The effect of Molybdenum and Boron fertilizer on Stylosanthes guianensis

The soil in the tropical region was generally short of Molybdenum and Boron, therefore, rational application of Molybdenum and Boron is important to increase the yield of forage production in the tropical regions. A field trial was conducted to determine the effects of Boron and Molybdenum on Stylosanthes guianensis by spraying way. This study showed that the application of Boron and Molybdenum with right amount increased the forage yield of S. guianensis when the soil was lack of Boron and molybdenum, and Molybdenum performed better than Boron, indicating that application of Molybdenum and Boron increased the forage by 2 475 kg/ha and 973 kg/ha with 16.4% and 6.0% increase rates, respectively. The spraying Boron and Molybdenum fertilizers increased the protein, phosphorus and potassium content of S. guianensis forage, and also increased the effective root nodules and the root activity of S. guianensis. Compared to Boron, S. guianensis treated by molybdenum showed the more effective root nodules and the higher oxidated anaphthylamines content in root. This study also indicated that application of right amount boron increased the crude ash content of S. guianensis.