目的 建立N、P、K施肥量与巫山淫羊藿Epimedium wushanense品质的回归模型, 探索巫山淫羊藿的最佳施肥方案。方法 采用3因素4水平设计施肥方案, 布置巫山淫羊藿N、P、K肥料效应实验, 并对实验数据进行整理与统计分析。结果 建立了N、P、K肥配施效应模型与巫山淫羊藿产量和质量之间的关系, 并对各因子之间的交互作用进行了分析, 对模型进行了优化。在不同施肥措施中N₂P₂K₂处理效果最佳, 不施或者少施N、P、K中的任何一种养分均不同程度导致巫山淫羊藿减产和质量下降;单因子效应分析表明, 随着N、P和K施肥量的提高, 产量和有效成分的量呈先升后降的趋势;双因素交互效应分析表明, 以巫山淫羊藿产量为考察对象, N、P、K肥间相互作用都存在一个值域, 低于这个值域时都表现为协同促进作用, 高于这个值域时则都表现为拮抗作用;以淫羊藿苷和朝藿定C的量为考察对象, N、K和P、K肥间相互作用存在一个值域, 有效成分的量表现出与产量相同的趋势。结论 模型优化结果表明, 大田实验适宜的N、P、K肥施用量分别为224.154～269.461、176.324～214.651、152.624～197.354 kg/hm²。

Objective To estabolish te fertilization index of nitrogen (N), phosphorus (P), and potassium (K) and regression model of Epimedii Wushanensis Herba, and to explore the optimization of fertilization. Methods The design of the fertilizer element 3 and factor 4 was introduced, the effect test of N, P, and K fertilizers was laid out and the test data were collected and analyzed statisticly. Results An empirical model of the relationship between Epimedii Wushanensis Herba and the contents of Icariin and epimedin C to N, P, and K were established and optimized to analyze the interaction among the tested factors. Conclusion Yield and quality of Epimedii Wushanensis Herba are lower significantly without one of N, P, and K and the optimization treatment efficiency is N₂P₂K₂. Single-factor analysis shows that the yield and the contents of active ingredients Icariin and epimedin C increase and then decrease steadily with the increase of the N, P, and K application. The first order interaction analysis indicates that there exists an interaction range between N and P, N and K, P and K. The synergistic and antagonistic effects are shown in the lower and higher.

重庆市教委自然科学项目(KJ131802)