The influence of the application amount of N,P,K and its provision on the yield of Angelical dahurica var. formosasa
氮、磷、钾施用量及其配比对白芷产量的影响

The influence of the application amount of N,P,K and its provision(on) the yield of Angelical dahurica var.(formosasa) was studied through 3 years experiments.The result indicates the positive relationship between the provision of N,P,K and the yield of Angelical dahurica var.formosasa.(With) the ascending of the fertilizers usage,(the) yield is(promoted.) The yield of the plant(to)(which) the(fertilizers) are applied is higher than the one to which the fertilizers are(applied) singly.