Study on compensation effects of nitrogen nutrition and water stress in the yield of soybean

According to theory of the compensation effect of water deficit and re-watering and inorganic nutrients to improve crop drought resistance, the compensation effects test about nitrogen nutrition and water stress in the yield of soybean were devised, mechanisms of soybean yield to drought stress and inorganic nutrients were studied. The results showed that, under the conditions of 14d water stress re-watering, the soybean yield showed the strong compensation effect when relative soil water content was among the 40% to 60%, but the nitrogen content changed greatly. With the decrease of relative soil water content, nitrogen content was significantly increased. This shows that the yield of soybean showed a very complex change under the joint effect of the water stress and nitrogen nutrition, the soybean yield could achieve the maximum yield and show the strong compensation effect under the conditions that soil water content and nitrogen content coordinated.