Deep banding of controlled-release potassium sulfate improves soybean productivity by regulating soil microbial communities, enhancing soil enzyme activity and plant growth characteristics

Although both controlled-release potassium sulfate application and deep banding fertilization can improve crop yields, there is limited information on the effect of their coupling on soybean production. In the present study, two-year (2023-2024) field plot experiments were conducted to investigate soybean productivity, soil microbial community, soil enzyme activities, and plant growth characteristics in the different K fertilizer types and fertilization methods, which included potassium sulfate (PS) and controlled-release potassium sulfate (CPS) at two fertilization methods (broadcasting fertilization and deep banding fertilization).

尽管控释硫酸钾（controlled-release potassium sulfate, CPS）施用与带状深施肥（deep banding fertilization）均能提升作物产量，但目前关于二者耦合配施对大豆生产的影响的相关研究仍较为有限。本研究于2023-2024年开展为期两年的田间小区试验，设置不同钾肥类型与施肥方式组合处理，以探究其对大豆生产力、土壤微生物群落、土壤酶活性及植株生长特性的影响。试验中供试钾肥包括普通硫酸钾（potassium sulfate, PS）与CPS，施肥方式则涵盖撒施（broadcasting fertilization）与带状深施肥。