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大麦钾肥试验在浙江省中部红壤地区三熟制水稻土上进行，共设置１９个试验点。施用钾肥的增产幅度为５．０～１３１．７ｋｇ／亩，其中６３％的试验点增产达显著或极显著水平。土壤速效钾与相对产量的相关系数为０．６７５。提出了用“临界水平”和“足够水平”相结合划分土壤钾肥力指标的新方法。对钾肥用量试验中出现的非典型二次曲线模式进行判别；拟定不同钾肥力指标的钾肥用量。用Ｙ＝ａｅ指数国数建立土壤测定值与施钾增产量．增产百分率、养分效益、利润、产投比等五项农学与经济效应的相关关系，作为产前预测的依据。
The experiment of barley potash fertilizer was carried out on the paddy soil of the third tributary paddy soil in the middle red soil area of Zhejiang Province. A total of 19 experimental sites were set up. Potash fertilizer application rate of 5.0 ~ 131.7kg / mu, of which 63% of the experimental points yield significant or very significant level. The correlation coefficient of soil available K and relative yield was 0.675. A new method of dividing soil fertility index with “critical level” and “adequate level” is proposed. Discrimination was made on the atypical conicoid pattern which appeared in the experiment of potash fertilizer dosage. Potassium fertilizer dosage for different potassium fertilizers was drawn up. With Y = ae index number of soil to establish the national determination of potassium and increase production. The relationship between the five agronomic and economic effects, such as the percentage of increase in production, the benefit of nutrients, the profit, the ratio of production to investment, etc., serves as the basis for prenatal prediction.