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采用盆栽试验 ,研究秸秆钾和化肥钾两种不同来源的钾素在作物和土壤中的吸收利用情况。结果表明 :施用秸秆钾与化肥钾 ,稻麦轮作制中两季作物总产量基本相当 ;作物对秸秆钾与化肥钾的两季利用情况有较大差异 ,但两季总吸收量与利用率相差不大 ;作物施用秸秆钾当季应加强氮素的配合施用 ,特别是在小麦上 ;作物所吸收的秸秆钾与化肥钾有约 80 %以上贮存于秸秆中 ,只有约 10 %左右通过籽粒带走 ,另有约 5%存在根茬
Pot experiments were conducted to study the uptake and utilization of potassium in crops and soils from two different sources of straw and fertilizer potassium. The results showed that the total crop yield of the two seasons was basically the same with the application of straw potassium and chemical fertilizer potassium. The utilization of crop potassium and chemical fertilizer potassium in the two seasons was quite different, but the total absorption and utilization of the two seasons were different Is not; crop application of potassium should be strengthened in the current season with the application of nitrogen, especially in wheat; crop absorbed by potassium and potassium fertilizer about 80% stored in straw, only about 10% through the grain Go, and about 5% of the existence of stubble