知识与财富的链接
【目的】获得玄参的最佳施肥方案。【方法】采用N、P、K三因素二次D-饱和最优设计方案,在陕西省镇坪县进行了玄参的N、P、K肥施用量及配比试验。【结果】求得玄参的N、P、K肥效反应数学模型,通过模拟选优,提出了玄参目标产量为8000~9000 kg/hm2时,纯N施用量为196.2138~337.0852 kg/hm2,P2O5施用量为97.92685~189.9207 kg/hm2,K2O施用量为152.7422~325.0003 kg/hm2。【结论】玄参对N肥和K肥的耐受力差,施用P肥对其产量影响较大。
【Objective】 The study is to obtain the best fertilization scheme.【Method】 Through the optimum design of N,P,K with 4 levels,the field experiments were conducted in Zhenping of Shaanxi province.【Result】 The optimization mathematical models of N,P,K fertilization were obtained. Based on optimal mathematical models, the fertilizer rate of N,P,K for certain figwort yields in different soil conditions were obtained.The target yield was over 8 000-9 000 kg/hm2,fertilizer amount of N was 196.213 8-337.085 2 kg/hm2,P2O5 was 97.926 85-189.920 7 kg/hm2,K2O was 152.742 2-325.000 3 kg/hm2.【Conclusion】 It was concluded that figwort didn''t adapt to N and K,while P affected the output of figwor greatly.