Effects of nitrogen, phosphorus and potassium on root vigor and free amino acid content of {\sl Astragalus membranaceus} seedlings

作者：Yong Tan, Zongsuo Liang, Weiling Wang, Qimei Duan, Rang Cao · 发表于：Xibei zhiwu xuebao · 年份：2006 · 被引用次数：3 · 研究领域：Plant Physiology and Cultivation Studies、Plant nutrient uptake and metabolism、Polymer-Based Agricultural Enhancements

Hydroponics was employed to study the effects of different nutritional levels on root vigor and free amino acid composition and content of Astragalus membranaceus seedlings.The results indicated that nutrient deficiency significantly reduced the vigor of Astragalus membranaceus roots,the free amino acid contents in different nutritional treatments significantly differed,the total free amino acid amount increased in the order of leaf>root,and the total free amino acid content in various treatments increased in the order of -K>-P>-NPK>-N. The treatments with a complete set of nutrients could increase root vigor and harmonize root/shoot ratio compared with the nutrient deficiency treatments. Astragalus membranaceys seedlings strengthened their adaptability to the adverse environments characterized by nutrient stress by increasing the amino acid content in their bodies.