土壤含水量对地黄产量及质量的影响

目的：评价土壤含水量对地黄产量及质量的影响。方法：在地黄生长期的不同阶段调整土壤的含水量，收获后测定不同含水量土壤所产地黄药材的产量、浸出物和梓醇、毛蕊花糖苷及多糖的含量，使用灰色模式识别法对实验数据进行分析。结果：土壤含水量影响为中水分（M2>高水分（M3）>低水分（M1）>空白（M4）。结论：地黄栽培过程中，土壤含水量在苗期应保持在40%-50%，块根形成期和块根膨大期应为50%-60%，收获期应为20%-30%，合理调节土壤含水量能够显著提高地黄的产量及质量。

Effects of Different Soil Water Content on the Yield and Quality of Rehmannia Glutinosa

This study aimed to elucidate the effects of different soil water contents on the yield and quality of R.glutinosa.Different soil water contents were adjusted in different periods of growth of R.glutinosa.The yield,content of water extract,catalpol,verbascoside and polysaccharide were determined and analysed by the grey pattern recognition after harvests. The impacts of soil water content from the most important to the least important were medium moisture content(M2),high moisture content(M3),low moisture content(M1)and blank(M4).In the cultivation of R.glutinosa,the soil water content should be remained in the range of 40%-50% at seedling stage,while 50%-60% at the stage of root formation and tuber enlargement,and 20%-30% during harvesting,which can significantly improve the yield and quality of R.glutinosa.