氮磷钾肥对黄芩产量及黄芩苷含量的影响

Effects of N P K on Yield and Baicalin Contents of Scutellaria baicalensis

目的：探讨肥料对黄芩生长发育、生理指标及黄芩苷的影响。方法：采用氮磷钾三因素五水平的D-最优饱和设计，用盆栽法测量黄芩的生长、生理指标及黄芩苷含量。结果：黄芩各项生长、及黄芩苷含量均为复肥型高于单肥型，复肥型中又以营养平衡型大于营养失调型。在复肥型中，磷元素与氮合理配施可以提高磷的肥效。结论：根据氮磷钾二次肥料数学模型计算结果，确定最佳施肥量：N：22．6-25．0g／m^2，P：30．6～44．6g／m^2，K：5．4～21．4g／m^2，氮、磷、钾的最佳配比：2N：3P：1K。

Objective： To find out the effects of different levels and combinations of nitrogen, phosphorus and potassium on the growth and secondary metabolites of ScuteUaria baicalensis. Methods： The quantities of growth, physiological indicators and baicalin contents in different fertilization treatment were calculated and compared. Results： The growth physiological indicators and baicalin contents of S. baicalensis in complex fertilization treatment were better than those in single element fertilization treatment, and nutrition balance types better than maladjustment type. The reasonebly fertilitzing in complex fertilization treatment, nitrogen could improve the fertilizer efficiency of phosphorus. Conclusion： According to the fertilization mathematic model, the optimum fertilization dosage should be primarily defined as N： 22.6 -25.0 g/m^2,p：30. 6 -44.6 g/m^2 ,K：5.4 -21.4 g/m^2, that is 2N： 3P： 1K.