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一年生植物功能群对放牧草原生物量和土壤呼吸的影响

梁茂伟, 梁存柱, 白雪, 苗百岭, 王英舜, 包桂荣, 王譞

梁茂伟, 梁存柱, 白雪, 苗百岭, 王英舜, 包桂荣, 王譞. 一年生植物功能群对放牧草原生物量和土壤呼吸的影响[J]. 草业科学, 2016, 10(12): 2407-2417. DOI: 10.11829/j.issn.1001-0629.2016-0094
引用本文: 梁茂伟, 梁存柱, 白雪, 苗百岭, 王英舜, 包桂荣, 王譞. 一年生植物功能群对放牧草原生物量和土壤呼吸的影响[J]. 草业科学, 2016, 10(12): 2407-2417. DOI: 10.11829/j.issn.1001-0629.2016-0094
Mao-wei Liang, Cun-zhu Liang, Xue Bai, Bai-ling Miao, Ying-shun Wang, Gui-rong Bao, Xuan Wang. Effects of annual plant functional group on biomass and soil respiration in a grazing community of a typical steppe grassland[J]. Pratacultural Science, 2016, 10(12): 2407-2417. DOI: 10.11829/j.issn.1001-0629.2016-0094
Citation: Mao-wei Liang, Cun-zhu Liang, Xue Bai, Bai-ling Miao, Ying-shun Wang, Gui-rong Bao, Xuan Wang. Effects of annual plant functional group on biomass and soil respiration in a grazing community of a typical steppe grassland[J]. Pratacultural Science, 2016, 10(12): 2407-2417. DOI: 10.11829/j.issn.1001-0629.2016-0094

一年生植物功能群对放牧草原生物量和土壤呼吸的影响

基金项目: 

国家自然科学基金项目&#x0201c

内蒙古退化草原碳库特征及其形成机理的整合研究&#x0201d

(31160476)

中国气象局气候变化专项项目&#x0201c

气候变化对锡林郭勒典型草原畜牧业的影响及适应技术研究&#x0201d

(CCSF201522)

摘要: 作为草原群落重要层片的一年生植物功能群,在湿润季节和年份高度发育补偿群落生物量、维持放牧草原生态系统稳定,但尚不清楚一年生植物功能群通过这一补偿方式如何补偿群落地上/地下生物量和影响土壤呼吸。基于2012年和2013年内蒙古锡林郭勒大针茅(Stipa grandis)+羊草(Leymus chinensis)典型草原两个放牧强度试验样地群落地上/地下生物量、土壤呼吸及相关环境因子的测定。研究表明,1)一年生植物功能群对群落生产力的补偿作用及生长季土壤呼吸累积量在湿润年份(2012年)均大于干旱年份(2013年);且在中度放牧处理中均显著大于轻度放牧处理(P<0.05);2)土壤呼吸与一年生植物功能群地上、地下生物量、土壤5 cm温度和土壤0-10 cm含水率均具有极显著正相关关系(P<0.001)。由此表明,当放牧降低了草原群落多年生功能群生物量时,一年生植物功能群在湿润季节和年份可补偿群落生产力、促进土壤呼吸排放速率,进而影响草原生态系统碳循环过程。

 

English

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  • 收稿日期:  2016-02-28
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