福建水稻区域施肥模型和推荐施肥研究
Studies on the Regional Fertilizer Response Model and Fertilizer Recommendation on Rice in Fujian
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摘要: 根据89个水稻三要素肥料试验结果的无肥区产量水平,将福建稻田土壤划分成5个肥力等级。取同一肥力等级内的不同试验点的相同处理产量平均值,建立水稻区域施肥模型。依据这些模型,采用边际产量法或产量频率分析法确定各肥力等级的水稻最优施肥量。32个验证试验表明,不同肥力等级的水稻最优施肥量比常规施肥平均增产稻谷405-600Kg/hm2,每公顷净增收352~399元。Abstract: According to the field level Oo nonfertilization treatments from 89 N.P.K fertilizer trials on rice, the paddy soil was divided into 5 fertility grades in Fujian.In the same soil fertility grace, the regional fetilizer response models were established by the average yield of the same treatment in different sites.Based on the regional fertilizer response models that was the typical model or non-typical mode, the optimum fertilizer application rate in different soil fertility grades were recommended by the marginal yield method and yield freguency analysis method respetively.The thirty-two test and verify trials showed that the rice optimum fertilizer application rate in different fertility grades may increase 405-600kg/hm2 rice yield and 352-399 yuan/hm2 net income more than fanner’s practice in average.
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