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2012 Vol.29(2)

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Characteristics of phosphorus contents in the rhizosphere soil of different shrubs on sandy grassland in Maqu
2012, 6(2): 167-173.
[Abstract](1733) [PDF 426KB](891)
Abstract:
Three native shrubs inhabiting in Maqu county, including Salix oritrepha, Amorpha fruticosa and Hippophae rhamnoides, were used as materials to investigate the differences of total P content, available P content and P fractions between rhizosphere and nonrhizosphere soils. It was found that there was a higher available P concentration in the rhizosphere soil comparing to that in the nonrhizosphere soils of A.fruticosa and S.oritrepha.The total P content in the rhizosphere soil was higher than that in the nonrhizosphere soil of the three shrubs. The concentrations of total P and H2OP were lower in the nonrhizosphere soil than that in the rhizosphere soil except H.rhamnoides. The contents of NaOHPi and NaOHPo were higher in the rhizosphere soil than that in the nonrhizosphere soil of the three shrubs. The concentration of HHClPi in the rhizosphere soil was lower than that in the nonrhizosphere soil except A.fruticosa. The concentration of HHClPo in the rhizosphere soil was higher than that in nonrhizosphere soil except S.oritrepha. Regression analysis indicated that there was a negative significant relationship between available P concentration and pH in both soils of S.oritrepha and A.fruticosa, but no relationship was found between total P and available P concent in both of the rhizosphere and nonrhizosphere soils.
A study on physicochemical properties of salinealkaline grassland soil in Loess Plateau of the north of Shanxi Province
2012, 6(2): 174-178.
[Abstract](1323) [PDF 375KB](939)
Abstract:
To explore the physicochemistry properties of salinealkaline grassland soil in the Loess Plateau, the soil of salinealkaline grassland at layers of 0-10 cm, 10-20 cm, 20-30 cm, 30-50 cm, 50-75 cm and 75-100 cm were sampled and analyzed in the fall of 2008, the spring and autumn of 2009 respectively. The results indicated that the average soil bulk density of plots was 1.37 to 1.44 g/cm3, and the average specific gravity of soil was 2.67 to 2.81. The soil was sandy loam of the mechanical components. The soil alkalized degree was high with average soil pH between 8.69 to 9.19 and average exchangeable sodium percentage above 20%. The average soil soluble salinity content was between 0.61% to 0.98%, the anion by Cl- and HCO3- primarily and the positive ion by Na+ and Ca2+ primarily. The organic matter and the total nitrogen in the soil were lack.
Screening of premergence herbicides in centipedegrassduring turf establishment
2012, 6(2): 179-183.
[Abstract](1541) [PDF 403KB](985)
Abstract:
Five premergence herbicides including Oxadiazon, Trifluralin, Barricade, Smetdachlor and Flazasulfuron were tested during the centipede turfgrass establishment period. The results showed that Oxadiazon will cause a direct and temporary leaf injury after herbicide application, but the injury was gradually recovered. Flazasulfuron caused significant and continuous injuries and growth inhibition to centipedegrass. Barricade, Turfluralin and Smetdachlor were all safe to centipedegrass, with no significant injuries occurred after their applications and all growth parameters measured were higher than the control. Barricade performed the best in the weed control among these three safety herbicides, and could be recommended for the weed control during the centipedegrass establishment.
control of fungal diseases of trees and shrubs at Lanzhou Wuquanshan Park
2012, 6(2): 184-188.
[Abstract](1446) [PDF 428KB](929)
Abstract:
The fungal diseases of some trees and ornamental shrubs in Lanzhou Wuquanshan Park were investigated from the summer to the autumn in 2008 and 2009. The results showed that there were 32 fungal diseases caused mainly by imperfect fungi and Ascomycetes, in which 20 diseases were found on the trees, and 12 on the ornamental shrubs. Most of them occurred on Salicaceae and Rosaceae plant leaves. The quarantine and biological control for the pathogens and reasonable agricultural technologies for the plants maintenance should be effective measures to prevent the spread of fungal diseaces.
Seasonal dynamics of soil microbes and their relationship with soil physicochemical factors in alpine meadow in Maqu of Gansu
2012, 6(2): 189-197.
[Abstract](1588) [PDF 532KB](1075)
Abstract:
The seasonal dynamics of different soil microbes and their relationships with soil physicochemical factors were studied. The soil samples were taken from six sampling points of alpine meadow located in Maqu of Gansu. The results showed that soil bacteria occupied absolute advantage among soil microbes. Seasonal variation had a great influence on soil microbial activities. Soil microbes and soil physicochemical factors had close relationship. The peak value of bacteria quantity in soil appeared in April. Actinomycetes number decreased gradually from spring to autumn, while activities of fungi were stable. Ammonifier and nitrobacteria had more activities in April and October; denitrifier had more in July; and amounts of aerobic nitrogenfixing bacteria and aerobic cellulose decomposer were more in January. The results of main composition analysis of soil microbial quantity showed that aerobic nitrogenfixing bacteria and aerobic cellulose decomposer offered more contribution to soil fertility. The results of canonical correlation analysis showed that there was only one group of canonical variable correlation, which was caused by bacteria, fungi, ammonifier, denitrifier and soil pH value, conductivity, nitrate nitrogen, ammoniacal nitrogen and total phosphorus.
Evaluation of ecological carrying capacities in Gannan based on PSR model
2012, 6(2): 198-203.
[Abstract](1674) [PDF 0KB](353)
Abstract:
Ecological carrying capacity refers to the natural ecosystems to maintain their service functions and health potential in a certain socioeconomic conditions. The evaluation system of the ecological carrying capacity was established by using satellite imagery (TM, ETM+) and the census data in Gannan region. The 22 indexes including average vegetation coverage, area of cultivated land per capita, grazing overload rate etc. were determined by using the PRS (PressureStateResponse) ecological safety evalutation model. On this basis, the AGAAHP was used to calculate the weight value of each index. Then the ecological carrying capacity of each county of Gannan region in 2000, 2004 and 2008 was assessed with help of the State Space Method. The results indicated that the ecological carrying capacities of Maqu, Diebu, Zhouqu, Lintan County and Hezuo City were overloaded in 2000, 2004 and 2008. The ecological carrying capacity of Xiahe County was overloaded in 2000 and 2004, but that was in an ideal state in 2008. The ecological carrying capacity in Zhuoni County was 1.081 0 in 2000, while that was 0.934 8 and 0.924 3 in 2004 and 2008, respectively, in which indicated the ecological carrying capacity was improved in 2004 and 2008. The ecological carrying capacity of Luqu County was in an ideal state in 2004, while that was excesses capacity in 2000 and 2008. This study provided an effective method for evaluation of alpine pastoral ecological carrying capacities.
fluxes of alpine meadow ecosystems on the Tibetan Plateau
2012, 6(2): 204-210.
[Abstract](1947) [PDF 510KB](1933)
Abstract:
Alpine meadow is the key vegetation widely distributed on the Tibetan Plateau. Alpine ecosystem is a great important part in biogeochemical cycle between air and the ground surface, and it plays an extremely important role in carbon balance in this area. Advances on CO2 fluxes of alpine ecosystem were reviewed. The variations of carbon dioxide fluxes of alpine meadow ecosystem and its effecting factors were summarized on the Tibetan Plateau. Furthermore, the potential of source/sink and value of Q10 were compared between typical alpine meadow ecosystems and others. More specifically, some unsolved questions which need to be answered in the future were raised in this review.
Ji-Zhou LIN
2012, 6(2): 211-212.
[Abstract](1097) [PDF 337KB](1542)
Abstract:
Evaluation of salt tolerance of 11 approved alfalfa cultivars at seed germination stage
2012, 6(2): 213-218.
[Abstract](1350) [PDF 384KB](891)
Abstract:
In order to determine the optimal concentration of salt tolerance standard and confirm the effect of different concentration of NaCl on alfalfa (Medicago sativa) seed germination, seeds of 11 approved alfalfa cultivars were germinated at different concentrations of NaCl solution. The differences of germination potential, germination rate, seedling height and root length were also compared. The results showed that there were significant differences (P0.01) on above indexes among the 11 cultivars when the seeds were treated with the 1.25% NaCl concentration; and the differences were the largest compared with other treatments. By cluster analysis of three indexes of seed germination rate, seedling height and root length of alfalfa, it could conclude that 1.25% of NaCl concentration should be the optimal concentration for determining the salt tolerance in seed germination of alfalfa. In additional, by analysis the relationship between root length and salt stress, it seemed that root growth of alfalfa could be promoted with 0.30% salt concentration treatment, but stopped with 1.00% salt concentration treatment. 1.25% salt concentration treatment inhibited root growth of alfalfa.
Establishment of the SRAPPCR reaction system and selection of the primers in Stipa bungeana
2012, 6(2): 219-228.
[Abstract](1596) [PDF 738KB](720)
Abstract:
An improved CTAB method, suitable for isolating genomic DNA of Stipa bungeana, using the young leaves of this grass speicies, was established in a previous study. Based on this result, an orthogonal design and a factor analysis method were combined to optimize the SRAPPCR reaction system of S. bungeana, including five main factors: DNA, Taq Polymerase, dNTPs, Mg2+ and primers. The results indicated that the optimum concentrations of each component in the 20 L reaction system were: DNA (20 ngL-1)3 L, Taq Polymerase (5 UL-1) 0.2 L, dNTPs(2.5 mmolL-1) 1.4 L, primer(10 molL-1)1.0 L, Mg2+ (25 mmolL-1) 2.0 L, 10Buffer 2.5 L, ddH2O 8.9 L. This reaction system has been experimentally validatied and primers selected, and should be a suitable system for the genetic diversity analysis of S. bungeana. This SRAPPCR reaction system could provide a basis for the analysis of genetic diversity within S.bungeana germplasm resources, with applications being vegetation restoration and ecological reconstruction in the loess plateau.
Influence factors for obtaining aseptic seedlings of early spring ephemeral Lachnoloma lehmannii in tissue culture
2012, 6(2): 229-237.
[Abstract](1457) [PDF 547KB](931)
Abstract:
In order to establish a system of aseptic seedling of Lachnoloma lehmannii in tissue culture, using seeds as material, different disinfection methods of seeds were compared. The influence factors of seed germination and seedling growth were investigated. The results indicated that 1) a suitable method for seed sterilization was that seeds were washed under running tap water for 1-2 min, soaked in 70% ethanol for 1 min and disinfected with 0.1% HgCl2 solution for 1.5 min. 2) Illumination was beneficial for seed germination, but different parts of seedlings had different responses to the lights. 3) Seed germination depend on a low temperature, while seedling growth required a certain high temperature. 4) Some hormones promote the seed germination, but different parts of seedlings had different reaction to the hormones. Therefore, the suitable culture system for seed germination and seedling growth of L. lehmannii was that seeds were placed in MS medium without growth regulators after seed sterilization, and cultured under lights at temperature of 15 ℃/5 ℃ for 4-5 d. Plates with germinated seeds were then transferred to a place with same illumination and temperature of 25 ℃ for seedling growth. The seed germination rate increased from 16% (control) to 90% and the seedlings grew well.
A study on seed germination characteristics of 15 Chenopodiaceae and Polygonaceae species of the eastern edge of QinghaiTibet Plateau
2012, 6(2): 238-244.
[Abstract](1628) [PDF 474KB](801)
Abstract:
Under different light gradients [100% and 3% natural sunlight (NS)], both seed germination percentage (GP) and relative light germination rate (RLG) of 15 Chenopodiaceae and Polygonaceae species of the eastern edge of QinghaiTibet Plateau were measured in this study. Differences on germination of these species under two light levels were also analyzed by pairedsamples T test. The relationship between seed size and RLG was investigated by Pearson analysis. The T test displayed that germination response to lights was different in all of the species, while the Pearson analysis showed that germination became less dependent on lights with increasing seed mass. We also found that there were differences on germination bewteen annual and perennial species. The germination of annual species needed light, but became less dependent with increasing seed mass (P0.001); while the germination of perennial species did not depend on the lights (P0.05). The study demonstrated that germination responses to lights of the 15 Chenopodiaceae and Polygonaceae species were affected by both seed size and life form.
A study on seed characteristics of Lotus japonicus at maturity stage
2012, 6(2): 245-248.
[Abstract](1370) [PDF 373KB](671)
Abstract:
The study analyzed maturated seed characteristics of Lotus japonicus. The results indicated that L. japonicus seeds matured at different time with splitting sharply. Under normal production circumstance, the seed loss was serious and quality of seed was not good. The yield and quality of seeds were affected by split numbers and matured pod numbers. The harvest of L. japonicus seeds should be at the stage with the lowest split and the highest matured pod number. The seeds harvested at this stage should not only have higher yield, higher numbers of filled seeds, heavier 1 000 seed weight and sufficient nutrients, but also have higher sprout ability, germinating potential, and germination percentage and vigor index as well.
Seed germination responses of four Limonium species to temperature
Dun-Nian WANG, De-Lu LI
2012, 6(2): 249-254.
[Abstract](1501) [PDF 461KB](784)
Abstract:
Seed germination responses to temperature in one indigenous species, Limonium aureum, and three introduced species, L. bicolor, L. gmelinii and L. otolepis were studied under controlled conditions in the laboratory. The temperature rang of seed maximum germination rate for L. aureum (95% to 97%) was 10 to 20 ℃, and for L. bicolor (95% to 100%), L. gmelinii (over 98%) and L. otolepis (97% to 99%) were 15 to 25 ℃, 20 to 35 ℃ and 20 to 30 ℃, respectively. The temperature rang for seed maximum germination potentiality of L. aureum was 15 to 20 ℃, for these of L. bicolor, L. gmelini, and L. otolepis were 15 to 20 ℃, 20 to 35 ℃ and 25 to 30 ℃. The temperature rang of seed maximum germination index for L. aureum was 15 to 20 ℃, but for L. bicolor was 20 to 25 ℃, for L. gmelinii was 25 to 30 ℃ and for L. otolepis was 20 ℃. The maximum value of germination index appeared in different temperatures, where for L. aureum, L. bicolor and L. otolepis appeared at 20 ℃ with the germination indexes of 36.26, 37.26 and 24.34, respectively. However, the maximum value of germination index for L. gmelinii presented to 30 ℃ with the index of 33.12. The temperature rang of seedling length maximum value for L. aureum was 15 to 20 ℃, for L. bicolor was 20 to 25 ℃, for L. gmelinii was 25 to 30 ℃ and for L. otolepis was 20 to 25 ℃. In general, the optimum germination temperature range for four Limonium were 15 to 20 ℃, 20 to 25 ℃, 25 to 30 ℃ and 20 to 25 ℃, respectively.
Allelopathy effects of aqueous extract of maize leaf on Scutellaria baicalensis seeds
Xiao-Bang BANG, Shuo-Xin ZHANG
2012, 6(2): 255-262.
[Abstract](1724) [PDF 498KB](812)
Abstract:
This study examined allelopathy effects of aqueous extract of maize (Zea mays) leaf on seed germination and seedling growth of Scutellaria baicalensis obtained from different regions and treated with different concentrations (0,0.005,0.010,0.020,0.030, and 0.040 gmL-1) of the aqueous extract. The results showed that low concentrations (0.005,0.010 and 0.020 gmL-1) of maize leaf aqueous extract stimulated the seed germination rate of S. baicalensis significantly. With the concentration of the aqueous extract increasing, the seed germination rates of all the receptors decreased gradually and were inhibited when the aqueous extract concentration reacheed a certain level. The results also indicated that maize leaf aqueous extract enhanced the root length, shoot height, relative electricity conductivity, content of soluble protein and content of soluble sugar of receptor plants. The S. baicalensis seeds treated with 0.020 gmL-1 concentration of maize leaf aqueous extract gave stronger promoting allelopathy than that of other concentration. Maize leaf aqueous extract can promote seed germination and seedling growth of S. baicalensis.
Allelopathy effects of Aconitum leucostomum aqueous extract on seed germination of four forage species
Cai-Qin XU, Sha-Zhou AN, HE Jun
2012, 6(2): 263-266.
[Abstract](1462) [PDF 367KB](890)
Abstract:
Effects of root and stemleaf aqueous extracts of Aconitum leucostomum on seed germination of 4 forages was studied in a pot culture. experiment The result showed that the aqueous extracts of root and stemleaf of A. leucostomum inhibited seed germination rates and germination indexes of the forages. Inhibition of root aqueous extract on germination rates and germination indexes was more severe than those of stemleaf aqueous extract. The inhibiting effect on germination indexes was greater than on germination rates. The inhibiting effect was increased with the increase of concentration of aqueous extracts. The order of allelopathic sensitivity to A. leucostomum aqueous extracts was Bromus inermis>Lolium perenne>Poa pratensis>Festuca arundinacea.
A study on introduction of Pennisetum purpureum cv.Guiminying
2012, 6(2): 267-273.
[Abstract](1628) [PDF 447KB](837)
Abstract:
A series of studies on performances of Pennisetum purpureum cv.Guiminying introduced from Taiwan in 2003 were conducted, including the plot, field and production trials. The results showed that P. purpureum cv.Guiminying had a wide adaptability, cold resistance and high yield. The average of annual hay yield of P. purpureum cv.Guiminying was 35.75 tha-1, increased by 33.59% and 53.19% compared with control (P. purpureum cv.Mott)[(P. americanumP. purureum) cv.Guimu No.1] (26.76 tha-1) and P. purpureum cv.Huanan (23.34 tha-1), respectively. In addition, as P. purpureum Schum cv.Guiminying grew fast and grass was soft. Furthermore, The protein and amino acids contents of this variety were higher by 10.5% and 7.89%, respectively. Therefore,P. purpureum cv.Guiminying has a higher nutritive value than other comparisons and it should be one of excellent forages in the subtropical region.
Effects of nitrogen,phosphorus and potassium on the DNJ yield of mulberry leaf in spring
2012, 6(2): 274-279.
[Abstract](1153) [PDF 424KB](668)
Abstract:
In order to increase the 1deoxynojimycin(DNJ) yield of mulberry leaf in spring,3414fertilizer experiment design, the DNJ yield of mulberry leaf as objective function and fertilization level of N、P、K as regulatory factor, was utilized to survey the effects of different proportion of N、P、K on the DNJ yield of mulberry leaf, and simulate regression between them. The results showed the different proportion of N、P、K had significant effect on the DNJ content of mulberry leaf,and the DNJ content were significantly increased with the increase of simple fertilization amount,to the peak at the 2 level(N2P2K2). The optimum recommended fertilization parameters and the optimum economical yield were respectively achieved by the fertilizer effect function, 286.11 kgha-1 N、95.22 kgha-1 P2O5、159.62 kgha-1 K2O and 23.23 kgha-1.The optimum fertilization design after conformation in productive practice would provide references on the high yield and qualities of mulberry leaf in Sichuan hilly area.
Animal demandingfeed availability balance control series studies 5 herbage yield monthly change
Jing-Feng LI, Zhi-Xin JI
2012, 6(2): 280-284.
[Abstract](1516) [PDF 422KB](781)
Abstract:
Based on the grassland primary production data obtained from Xilinguole League and Hulunbier League, the paper introduced the calculation method for herbage yield monthly dynamic coefficient. Herbage production dynamic changing patterns in different types of grasslands and in different regions were compared. The changing patterns under different grazing pressures were also examined. It was showed that herbage yield monthly changing patterns were similar in different situations. In most cases, the highest herbage yield occurred in August. In considering the similarity of climatic features in different pastoral regions in northern China, it was recommended that the method of calculating herbage yield dynamic coefficient introduced in this paper could be applied to more widespread regions in northern China. Some coefficients deduced from this paper could even be directly adopted by other regions with similar climate feature.
Analysis of nutritional value of common used forages in the goat production area in Sichuan Province
2012, 6(2): 285-290.
[Abstract](1469) [PDF 405KB](807)
Abstract:
Conventional nutrients and mineral elements of 12 common used forages (fresh grass,straw and silkworm) in five regions of Jianyang, Lezhi, Zigong, Nanjiang and Shuangliu in Sichuan Province were respectively measured in this study. The results showed that (1) Fresh grass and the silkworm had higher nutritional value compared with other forages. The crude protein contents in above forages were 13.94% and 13.03%, and crude fiber contents were 31.76% and 18.33%, so that they could be used as highquality forages for goats. The straw had lower nutritional value; its protein contents and crude fiber contents were 7.52% and 44.55% respectively. They could be used as supplements when the roughage was insufficient. (2) The contents of calcium, potassium, magnesium and iron in the forages were higher and could meet the basic requirements of animals. However, the additional phosphorus, sodium, zinc, copper, manganese and selenium should be supplemented due to be not enough for animal growth.
A comprehensive review of the estimation technology of feed intake and diet composition in grazing livestock
2012, 6(2): 291-300.
[Abstract](1274) [PDF 698KB](824)
Abstract:
Forage intake by grazing livestock is one of the keys to understanding forage grazing system dynamics. It is confirmed that understanding the types of plant species selected by the animal and the contribution of each species to the total intake could give an insight into the nutritional status of the animal and predict their performance, thus providing an objective basis for various management decisions and offering a feasible range management strategy to optimize resource utilization. However, estimating intake and diet composition of freeranging livestock is difficult and expensive. The advanced technology and the improved methods have significantly improved our ability to collect grazing behavior data, but measurement of feed intake, diet composition and nutrient digestibility in freeranging animals remains a challenge in nutritional study because of the inherent errors associated with the methods that are used at present. In this review, we discussed the advantages and disadvantages, and more or less accuracy of those main methods (including imitation, preand postgrazing technique, acidinsoluble ash method, in vitro digestibility in combination of intraruminal chromic oxide method, nalkanes plant cuticular wax markers and near infrared reflectance spectroscopy) and also expounded a growing tendency to evaluate the feed intake and diet composition, consequently to supply information for further studies.
Optimum conditions on extraction of tannin from Leucaena leucocephala
2012, 6(2): 301-305.
[Abstract](1245) [PDF 392KB](1146)
Abstract:
The optimum conditions, including four main factors: ratio of liquid to material, extraction temperature, extraction time and extractant concentration, for extracting tannins from leaves and stems of Leucaena leucocephala were optimized by using a combined method of single factor analysis and orthogonal experiment design. The results showed that the optimum conditions of each factor in tannin extraction were: ratio of liquid to material 40∶1, extraction temperature 50 ℃, extraction time 40 min and acetone concentration 50%. The extracting rate of the tannin from the leaves and stems of L. leucocephala was 2.54%. Key words: Leucaena leucocephala; tannins; extraction
Progress in the study on the ecological compensation of grassland
2012, 6(2): 306-313.
[Abstract](1499) [PDF 491KB](986)
Abstract:
Deterioration of the vast grasslands ecological environment in China has accelerated due to intensification of human activities. This deterioration has become an obstacle to economic and social development. Recognition that the grassland ecosystem is very important and irreplaceable has resulted in the investigation of ways to limit the deterioration. One system is ecological compensation in which those who obtain benefits pay costs of ecological services that serve to restore and maintain the ecosystem. Literature from China and abroad relating to ecological compensation, including the definition and rationale, the mechanism of ecological compensation were reviewed in this study. The types of studies in the previous studies were analyzed, including the research methods, contents and scale of ecological compensation. The direction of future studies on grassland ecological compensation was also discussed.
Urgency of further developing alfalfa industry in China
2012, 6(2): 314-319.
[Abstract](1229) [PDF 501KB](1144)
Abstract:
The rapid development of animal husbandry in China, especially the prosperous development of dairy farming, greatly increases the need for herbage of high quality, particularly alfalfa. This study pointed out that the alfalfa yield was low, and its quality was poor, and the supply of alfalfa did not meet its market demand in China. Consequently, the total quantity of imported alfalfa showed a increasing trend and came to 227 200 t in 2010, threatening the development of alfalfa industry in China. This study proposed that it is urgent to develop the alfalfa industry because alfalfa industry was regulated by many factors. Finally, this study proposed some suggestions for further developing the alfalfa industry. Firstly, it was urgent to make development plan of alfalfa industry; secondly, the compensation package needed to be improved for alfalfa producer; thirdly, it was effort to innovate the utilization technology and support the leading enterprise of alfalfa industry; fourthly, establishing the demonstration base with modern technology was necessary by integrating the alfalfa resources, which would benefit the establishment of alfalfa industry belt and increased the comprehensively productive ability and supply ability by optimizing regional distribution, planting scale, exercising mechanization and rationally managing with standard.
Research on history and current situation of forage and crop rotation in China
2012, 6(2): 320-326.
[Abstract](1348) [PDF 558KB](877)
Abstract:
Forage and crop rotation are commonly recommended for sustaining crop production and enhancing soil quality. Effects of forage and crop rotation in crop systems have been reported by many researchers from the Wei, Jin and Southern and Northern Dynasties period to present. Recent researches were focused on the potential, significance, profitability, mode and soil fertility of forage and crop rotation in China. Forage and crop rotation has numerous economic, ecologic and social benefits in the farming system, which can increase crop and forage yields, enhance nutrient cycles and improve the living standard of farmers.
QIAN Xu, YIN Zuoqian, JIN Hailin, YANG Kecheng, BAI Lou
2012, 6(2): 327-330.
[Abstract](1516) [PDF 382KB](808)
Abstract:
Forage Sorghum (Sorghum bicolor)seeds was introduced from Japan. Summer sowing test was conducted to observe its biological characteristics and local adaptive in Yuzhong County in Gansu province, and the grass yield and forage nutrients was analyzed after 120 days growth period. The results showed that, Japan forage sorghum have the advantages of cold and drought resistance and flourishes, and its adapted to the climate, soil and water fertilizer conditions of Yuzhong county. After 120 growing days, fresh yield and dry matter yield were 184 500 kgha-1 and 43 460 kgha-1, respectively, which is higher than that of local sorghum at the mature period. Main nutritional components(dry matter) of the whole plant of Japan forage sorghum were similar to those of local sorghum at the mature period, but, gross energy is about twice as much as local sorghum. Comparing with the whole plant of Japan forage sorghum that harvested at the mature period in Japan, when growing in Yuzhong county, the crude protein and nitrogenfree extract content were enhanced by 59.91% and 15.91%, and the crude fibre and ether extract were decreased by 20.14% and 72.52%, respectively. Overall, Japan forage sorghum is a good forage crop with excellent adaptability, high yield and high nutritional value, which is suitable for planting in Yuzhong county.