优化施肥对夏枯草果穗干物质及其产量的效应分析

目的:研究氮、磷、钾及有机复合肥不同施肥量对夏枯草果穗干物质及其产量的影响,以期为夏枯草规范化栽培技术的建立提供理论依据.方法:田间小区试验采用四因素二次正交旋转组合设计,建立夏枯草果穗产量的函数模型.结果:通过模型解析,氮、磷、钾对夏枯草果穗产量均有显著影响,其中,氮肥对夏枯草果穗产量影响最大,其次为磷肥、再次钾肥,有机复合肥最小;在低肥力条件下,夏枯草果穗产量均随氮、磷、钾及有机复合肥施用量增加而提高;当氮、磷、钾及有机复合肥施用量过多,则导致果穗产量下降.结论:本试验条件下,夏枯草果穗产量超过为722 kg·hm-2的优化施肥方案为N 303.9 ～335.1 kg·hm-2,P2O5 432.5 ～ 500.6 kg·hm-2,K2O 206.6 ～240.2 kg·hm-2,有机复合肥2 312.5 ～2 687.5 kg·hm-2.

Effect of optimized fertilization on spicas biomass and yield of Prunella vulgaris

Objective: To study the effects of nitrogen (N), phosphorus (P₂O₅), potassium (K₂O) and organic compound fertilizer(OF)on spicas biomass and yield of Prunella vulgaris in order to provide a theoretical basis for good agriculture practice (GAP). Method: Field plot experiments with a 4-variable quadratic orthogonal rotation combination design were adopted, and a function model of spicas yield in P. vulgaris was established. Result: The model analysis showed that spicas yields of P. vulgaris were significantly influenced under the N, P₂O₅ and K₂O applications, among there factors, N had the greatest effects on spicas yield of P. vulgaris, the next was P₂O₅ and K₂O, OF had the smallest effects on spicas yield. At the lower fertility levels, the spicas yields of P. vulgaris were improved along with the increasing of N, P₂O₅, K₂O and OF applications, but the spicas yields decreased when N, P₂O₅, K₂O and OF were applied too much. Conclusion: In this experiment condition, the spicas yields of P. vulgaris could reach to 722 kg·hm^-2 when the fertilizer rates were N 303.9-335.1 kg·hm^-2, P₂O₅ 432.5-500.6 kg·hm^-2, K₂O 206.6-240.2 kg·hm^-2, OF 2 312.5-2 687.5 kg·hm^-2.