Effects of Different Irrigation Rates on Growth and Yield of Mengdou 1137
In order to provide a certain reference basis for rational irrigation during the key growth period of soybeans,this study utilized potted water control experiments to clarify the relationship between soybean growth and development characteristics,yield formation process,and soil drought by setting different irrigation amounts during key growth periods.The results showed that Mengdou 1137 were subjected to drought stress for a longer period of time during the grain filling stage than during the flowering stage.The plant height of S65％under mild drought during the grain filling stage was 85.2 cm,and the stem diameter value was 7.63 mm,which was the highest value in the two experimental areas.The mild drought treatment during the grain filling stage could achieve the goal of increasing soybean stem diameter value;The F65％treatment with mild drought during the flowering period increased yield by 6.2％,while other treatments reduced yield by 7.5％and 19.8％.The S65％treatment with mild drought during the grain filling period increased yield by 47.3％,while other treatments reduced yield by 14.4％and 26.4％.This indicated that drought during the grain filling period had the most severe impact on grain yield,with a greater degree of reduction than during the flowering period;The water consumption showed that the control group had sufficient water supply＞mild drought＞moderate drought＞severe drought treatment,while the yield showed that the control group had sufficient water supply＞moderate drought＞severe drought treatment.Considering the growth,development,and yield of soybeans,in order to produce tall and thick soybean plants without affecting yield and reducing water consumption,mild drought(field water holding capacity of 65％)treatment can be moderately adopted during the key growth period and pod setting period of soybeans,thus achieving the effect of water conservation and yield increase.
irrigation ratesdroughtsoybeancritical reproductive periodyieldgrowth and developement
万方数据
维普
