Effects of Sowing Date, Sowing Method and Coating Condition on Photosynthesis and Yield of Soybean (Glycine max L.)

Background: Soybean is in great demand and contains a variety of nutrients. Higher yield and stable production is extremely important to soybean farming. Sowing dates, sowing methods and seed coating are factors affecting soybean cultivation. Methods: This study used Kenfeng 16, a soybean variety widely cultivated in Heilongjiang province of China. Five sowing dates, two sowing methods (equidistant sowing and random sowing) and seed coating (coated and non-coated) were set as factors to determine the effects on flowering biomass, photosynthetic parameters and seed yield. Result: The results of the study indicated that selecting a suitable sowing date (May 7th), equidistant sowing method and seed coating resulted to more stable high yields. Compared with other sowing dates, random sowing and non-coated seeds, the yields increased by an average of 33.66%, 12.74% and 16.24%, respectively. This research elaborated the dynamic changes of important indicators of soybean under different sowing dates, sowing methods and seed coating, which holds significant guiding value for choosing appropriate cultivation measures for inmproved seed yield in the field.