减磷对黄芪生长与产量品质的影响

Effect of Phosphorus Reduction on Growth,Yield and Quality of Astragalus membranaceus

为研究减磷对黄芪Astragalus mongolicus生长及产量品质的影响,测定不同施磷水平下黄芪生长、生理、产量和品质指标。结果表明,施磷减量25%处理(P2)的减量增效效果显著,黄芪出苗率、叶面积、根长、根粗、鲜生物量、干生物量、类胡萝卜素含量、SOD活性、POD活性、CAT活性、经济效益和毛蕊异黄酮葡萄糖苷含量较全量施磷分别增加6.76%、3.32%、6.76%、18.01%、2.13%、3.80%、26.00%、7.12%、12.04%、3.90%、10.72%和13.47%,茎粗、鲜产量、干产量、折干率、总灰分、一等品率以及浸出物、叶绿素a、叶绿素b、多糖和黄芪甲苷含量较全量施磷无显著差异。

The effects of phosphorus reduction on the growth,physiology,yield and quality of Astragalus membranaceus were studied to provide scientific basis for its fertilization and cultivation.The growth,physiology,yield and quality indexes were measured by setting 4 phosphorus application levels.Results showed that phosphorus reduction by 25%treatment(P2)had a significant effect on growth,yield and quality of A.membranaceus.The seedling emergence rate,leaf area,root length,root diameter,fresh biomass,dry biomass,carotenoids content,SOD activity,POD activity,CAT activity,economic benefit and glucosinolate of acacia catechu content exhibited significantly increased by 6.76%,3.32%,6.76%,18.01%,2.13%,3.80%,26.00%,7.12%,12.04%,3.90%,10.72%and 13.47%respectively,compared to the full phosphorus application treatment.There were no significant differences in stem diameter,fresh yield,dry yield,drying rate,first grade rate,total ash and contents of chlorophyll a,chlorophyll b,extract,polysaccharide and astragaloside,compared with full phosphorus application.