产地对山药生长期内成分积累的影响

The effect of producing areas on the accumulation of the components in Dioscorea opposita Thunb. in the growth stage

目的:研究山药在不同产地成分的动态变化,指导山药GAP的实施,阐明产地对山药的影响。方法:对生长期内山药根茎中淀粉、蛋白质、浸出物、N、P、K及多糖含量进行分析。结果:淀粉含量以膨大初期和膨大盛期为最高,蛋白质在整个生长期内变化比较稳定,浸出物含量随生长进程而降低,多糖含量以膨大初期和叶枯期为最高;沁阳产区山药各成分含量均高于平遥产区;山药生长期内多糖含量与P、K含量均呈负相关,与醇溶性浸出物含量呈正相关。结论:山药生长期内各成分变化规律不随产地改变,但含量因产地而不同。

Objective： To study the variance of the components in Dioscorea opposita Thunb. in the growth stage in different areas, supervising the implement of GAP and illuminating the effect of producing areas on Dioscorea opposita Thunb.. Methods： The content of starch, protein, soluble substance, polysaccharid, N, P and K were analyzed in Dioscorea opposita Thur,b. in the growth stage. Results： The starch content were higher in early and peak inflation stage, the variance of protein content was relatively stable, the content of soluble substance were decreasing with the growth course, the polysaccharid eontent were higher in early inflation and withered leaf stage; the components content in Qinyang were higher than Pingyao; the polysaccharid content had negative relation to the content of P, K and positive relation to that of mellow soluble substance. Conclusion： The variance law of components content has no change in the producing areas in the growth stage, but the content has difference with that.