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通过对“小麦-玉米-甘薯”旱三熟连续3年9茬作物(玉米、甘薯、小麦)施用氯化钾试验结果的灰色关联分析表明:增施钾肥和有机肥能提高“麦-玉-薯”旱三熟生产系统的稳定性;作物经济产量随施钾量提高而提高,增施有机肥也可显著提高作物产量,特别是玉米、甘薯的生物产量;在保证无机氮、无机磷供应的前提下,中钾处理增产效果高于低钾加有机肥处理,而低钾处理增产效果又高于有机肥;有机肥及钾肥能显著提高玉米、小麦的粗蛋白含量、穗粒数、千粒重,促进甘薯薯块增大增重。土壤速效钾含量随着施钾量增加而增加。
Through the gray correlation analysis of the results of potassium chloride application experiment on “three-year crop of wheat-corn-sweet potato” for three years and three crops (maize, sweet potato and wheat), the results showed that potassium and organic fertilizers increased “ Potato ”dry three-crop production system stability; crop economic output increased with the increase of potassium, organic fertilizer can also significantly increase the crop yield, especially corn, sweet potato biological production; to ensure the supply of inorganic nitrogen, inorganic phosphorus Under the premise of medium-potassium treatment yield higher than low potassium plus organic fertilizer treatment, and low potassium treatment yield higher than organic fertilizer; organic fertilizer and potassium fertilizer can significantly increase the corn, wheat protein content, grain number per spike, grain weight , To promote sweet potato tuber gain weight gain. Soil available potassium content increased with the increase of potassium supply.