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桑田合理配施磷钾肥肥效试验研究,通过四年研究再次证实桑田合理配施磷钾肥不仅能提高桑叶产量与质量,而且具有提高肥料利用率和对土壤养份消长及养分平衡等方面的作用。在N、P、K、三要素中,桑树对N的需要量最大,施用N肥的增产效应最显著,但施N素超过一定界限,不仅产量提高不显著,而且影响桑叶质量下降,为了探索桑树最佳施N量和更好的发挥三要素配比增产效应,提高肥料的经济效益,84年起进行盆栽试验,85年进行田间小区试验,现将结果整理,提供参考。
Through the four-year research, it was proved again that the rational application of P and K fertilizer in mulberry field could not only improve the yield and quality of mulberry leaf, but also improve the utilization rate of fertilizer and its effect on the decline of soil nutrients and nutrient balance . Among N, P, K and three factors, mulberry had the greatest demand for N and the yield-increasing effect was the most significant when N fertilizer was applied. However, the application of N exceeded a certain limit, not only the yield was not significantly increased but also the quality of mulberry leaves was decreased. Explore the best amount of N application mulberry and better play the role of the three elements of the ratio of stimulation effect and improve the economic benefits of fertilizer, 84 years of pot experiment, 85 years of field plot test, the results are collated to provide reference.