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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N_2P_2K_2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,大阳实验适宜的N、P、K肥施用量分别为224.154~269.461、176.324~214.651、152.624~197.354 kg/m~2。
Objective To establish a regression model of N, P, K fertilizers and Epimedium wushanense quality in Wushan Mountain, and explore the best fertilization scheme of Epimedium wushanense. Methods The three-factor and four-level design fertilization program was used to arrange N, P, K fertilizers effect experiment of Wushan epimedium, and the experimental data were arranged and statistically analyzed. Results The relationship between N, P and K fertilizers and the yield and quality of Epimedium wuenshan were established. The interaction among different factors was analyzed and the model was optimized. N 2 P 2 K 2 treatment had the best effect under different fertilization measures. The yield and quality of Epimedium wuenshanense decreased with the application of N 2, P 2 and K 2, respectively. The single factor analysis showed that with the increase of N , P and K increased, the yield and the amount of active ingredients increased first and then decreased. The two-factor interaction analysis showed that the interaction among N, P and K There is a range of values, below this range showed synergistic facilitation, higher than this value range showed antagonism; Icariin and Epimedin C as the object of investigation, N, K There is a range of interactions between P and K, and the amount of active ingredient shows the same trend as yield. Conclusion The results of model optimization showed that suitable application rates of N, P and K fertilizer in Dayang were 224.154 ~ 269.461, 176.324 ~ 214.651 and 152.624 ~ 197.354 kg / m ~ 2, respectively.