研究秸秆还田及秸秆还田配合施钾对三大土壤类型土壤中钾的盈亏影响 ,结果表明 ,潮土和褐土区中小麦 +玉米轮作制下 ,施钾配合秸秆还田 (NPKM)处理 ,能够保持整个周期循环中钾的平衡 ,归还率达 10 9.1%～111.9%。其中每年还田的小麦秸秆可以提供 2 2 6 .5～ 2 6 1.0 kg/ hm2钾的归还量。而不实行秸秆还田的施钾处理(NPK处理 ) ,钾归还率为 95 .2 %～ 97.1%。在砂姜黑土区小麦 +大豆轮作制度下 ,即使小麦秸秆不还田 ,仅施用化学钾肥 ,亦能维持小麦大豆轮作周期钾素的平衡。施钾配合秸秆还田 (NPKM)处理 ,钾归还率达 14 2 .0 % ,施钾且秸秆不还田 (NPK)处理钾归还率达 119.9%。主要是大豆不象玉米那样带走较多的钾造成的 The results showed that potassium and straw combined with straw returning (NPKM) treatment under wheat and corn rotation in the alluvial soil and cinnamon soil were the most effective ways to control the potassium deficiency in the three soil types soils. , Able to maintain the balance of potassium throughout the cycle, the return rate of 10 9.1% ~ 111.9%. Among them, wheat straw returning to the field each year can provide 225-260 kg / hm2 potassium return. Without the application of straw returning potassium (NPK treatment), the return rate of potassium was 95.2% ~ 97.1%. In Shajiang black soil wheat + soybean rotation system, even if the wheat straw does not return to the field, only the application of chemical potash can also maintain the balance of wheat soybean cycle potassium. Potash fertilizer application combined with straw returning (NPKM) resulted in 14.2% return of potassium and 119.9% ​​return of potassium by applying potassium and straw without returning (NPK). The main reason is that soybeans do not carry more potassium than corn does