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红砂土是由嘉定群夹关组砖红砂岩坡残积物发育而成,速效钾含量一般在40—60ppm左右,低的仅20—30ppm,致使小麦亩产长期徘徊在300—400斤左右。从1981—83年,我所在该土壤进行了定位试验,小麦亩施K_2O8斤,亩产由351.8—481.4斤,提高到528.9—582.9斤,净增96.5—177.0斤,每斤K_2O净增11—21斤,增产效果极显著,亩纯收入也增加20元以上。1984年又分别在乐山市、犍为县布置了38个小麦施钾示范点,并推广示范了1478.8亩。采用对比法,施钾处理亩施K_2O2.9—21.3斤,作底肥一次施用,取得
The red sandy soil is formed by the residue of the brick-red sandstone in the Jiaguan QunGuan group. The available potassium content is generally about 40-60ppm and the low is only 20-30ppm, resulting in the long-term wheat husking about 300-400kg per mu. From 1981 to 1983, the soil of which I was located was tested for location. Wheat Mushu K_2O8 kg per mu increased from 351.8-481.4 kg to 528.9-582.9 kg, a net increase of 96.5-177.0 kg, a net increase of K_2O of 11- 21 pounds, the effect of increasing yield is extremely significant, net income of mu also increased by 20 yuan or more. In 1984, 38 wheat demonstration sites for wheat were arranged in Leshan and Qiongwei counties respectively, and 1478.8 mu of land was promoted and demonstrated. Using contrast method, potassium application K 2 O 2 9-21.3 kg of K, applied as a base fertilizer, obtained