【摘要】 钾素在植株—土壤体系内循环的定位试验研究表明 ,施钾和秸秆还田具有明显的增产作用 ,同时维持了作物生长体系中钾素的平衡。冬小麦施钾可增产 7 9%～ 8 9% ,夏玉米施钾可增产 1 2 4%～ 1 4 4%。施钾能使轮作周期中的钾平衡系数达到 0 95 ,施钾且小麦秸秆还田能使轮作周期中的钾平衡系数达到 1 1 5。更多还原

【Abstract】 The fixed position experiment research of Potassium circulating in plant-soil system showed that two controls of applying Potassium and wheat straw return to soil can obviously increase yield. They can keep Potassium balance in growth circle. Applying Potassium can increase yield 7.9%～8.9% on winter wheat and 12.4%～14.4% on summer corn. The Potassium balance coefficient reached 0.95 with the application of Potassium, and 1.15 with Potassium application and straw return to soil together.更多还原