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期 刊 ：中国中药杂志 1996年 21卷 11期 页码：653.

关键词：黄芪；正交设计；采叶强度；采叶时间；产量；

Keywords:Radix Astragali seu Hedysari, orthogonal design, proportion of leaf picking, time of leaf picking, output,

摘 要 ：运用正交设计，明确了采叶强度和采叶时间对黄芪根粗和产量均有显著影响。采叶强度是影响根产量的最重要因素。随着采叶强度加大，采叶时间推迟，根粗和产量都明显下降，不采叶产量最高。采叶强度１／３，采叶时间６月１５日左右较为适宜，对产量影响较小。

Abstract:Based on an orthogonal design,the experiments have shown that proportion and time of leaf picking are the major factors to influence the thickness and output of Radix Astragali seu Hedysari.If the proportion is extended and the time is delayed,both the thickness and output of the roots will be reduced accordingly.The output will not change much if the time is set on around June 15 each year and the proportion is taken l out of 3.

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