丹参氮、磷肥效效应及最佳施肥模式研究

Study on N,P fertilization model of Salvia miltiorrhiza in different soil fertility

在陕西省商州市山阳县不同肥力土壤上,采用N、P二因素五水平最优设计,进行了丹参氮、磷优化配方施肥模式研究的多点田间试验。根据田间试验结果,求得不同土壤肥力水平下的N、P肥效反应方程,根据方程提出丹参不同产量水平的N、P合理配比和肥料用量。寻优结果表明,在山阳低肥力土壤目标产量10000～11500kg/hm2之间的施氮为88.17～165.7kg/hm2,施磷(P2O5)为88.18～165.7kg/hm2;中肥力土壤目标产量在11000～14000kg/hm2之间的施N量为108.5～187.4kg/hm2,施磷(P2O5)为105.1～179.5kg/hm2;高肥力土壤目标产量在20000～25000kg/hm2之间的施N量为85.4～173.1kg/hm2,施磷(P2O5)为121.95～179.01kg/hm2。合理施用N、P肥有利于提高丹参产量,但过量施肥会造成丹参减产。

It was adopted that the optimum design of N,P with 5 levels in the field experiment which was conducted in Shanyang county of Shaanxi province.The fertilizer rate of N,P for certain Salvia miltiorrhiza yields in different soil condition were obtained base on the response equations the optimum amount of N,P fertilizers in different soil fertility condition.The fertilizer amount of N,P is N 88.17~165.7 kg/hm2 and P2O5 88.18~165.7 kg/hm2 when Salvia miltiorrhiza target yield at 10 000~11 500 kg/hm2;If Salvia miltiorrhiza target yield at 11 000~14 000 kg/hm2,N rate is N 108.5~187.4 kg/hm2 and P rate is P2O5 105.1~179.5 kg/hm2;N rate is N 85.4~173.1 kg/hm2 and P rate is P2O5 121.95~179.01 kg/hm2 when Salvia miltiorrhiza target yield at 20 000~25 000 kg/hm2.N,P fertilizer promoted the Salvia miltiorrhiza yield but using excess N,P fertilizer can reduce the output of Salvia miltiorrhiza.