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一、主要作物的钾肥效应 1.主要粮食作物的钾肥效应:据1981年497次试验资料统计。亩施5～6kgK_2O,平均每kgK_2O增产4.2kg小麦或5.7kg玉米。土类间钾肥肥效为棕壤>褐土>潮土;作物种类间为夏玉米>冬小麦。1988～1990年在淄博市潮褐土高产区50多个钾肥试验结果表明,在土壤速效钾含,98～108.3mg/kg的情况下,亩施10kgK_2O小麦增产28.4％、玉米增产27.0％,平均每kgK_2O可增产13.4kg小麦或12.0kg玉米。1981～1983年114次甘薯试验结果表明,平均每kgK_2O增产30kg薯块。1991～1992年在海阳、沂水、平度、长清等20余处平衡施肥试验示范结果,亩施7.5kg
First, the main crop potassium effect 1. Potassium effect of the main food crops: According to 1981 statistics of 497 test data. Mushi 5 ~ 6kgK_2O, an average yield of 4.2kg kg kg of wheat or 5.7kg of corn. Potassium fertility of soil is brown soil> cinnamon soil> alluvial soil; summer corn> winter wheat. From 1988 to 1990, more than 50 potash experiments were conducted in the high-yielding area of Zibo Cinnamon soil. The results showed that under the condition of 98 ~ 108.3mg / kg of available potassium, the yield of 10kgK_2O wheat increased 28.4% and that of corn increased 27.0% Each kgK_2O can increase 13.4kg of wheat or 12.0kg of corn. The results of 114 sweet potato experiments from 1981 to 1983 showed that 30 kg of potato mass per kg K_2O was added on average. 1991 to 1992 in Haiyang, Yishui, Pingdu, Changqing more than 20 balance fertilization test demonstration results, Mushi 7.5kg