Fertilizer Effect And Nutrient Accumulation Rule Of Angelica Dahurica In Normal Soil Nutrient Condition

Chinese traditional medicine is a traditional science system of China. It plays an important part in safeguarding men's health. There has been an upsurge in coming back to the nature all over the world since 1990's, it enormous market and commercial opportunities for China. Now China is establishing GAP(Good Agricultural Practice) policies of different kinds of Chinese traditional medicine so that China is able to catch up with the international evolution of Chinese traditional medicine soon. Using Hebei's authentic herb medicine Angelica dahurica (Fisch.ex Hoffm.)Benth.et Hook.f. as the experiment material, this research studied the growth characteristics, nutrient accumulation rule and the influence function of different kind of fertilizers on Angelica dahurica at vegetable growth period in normal soil nutrient condition in order to provide theory basis for making proper fertilization method. The main results are as follows:The vegetative growth period of spring sowing Angelica dahurica can be preliminarily divided into three phases: seedling period, leaf peak growth period and root peak growth period. In leaf peak growth period, the growth center was overground part. At that time, the plant developed higher rapidly, accumulated more photosynthate in leaves and the ratio of root-shoot was smaller than one. The physiological metabolism in leaf reached peak, with higher concentration of soluble protein, soluble sugar and coumarine which produced rapidly in leaf. In root peak growth period, the growth center changed into underground part. The root dry weight and root diameter grew rapidly, at the same time the amount of soluble protein, soluble sugar, starch and coumarine gained in root was faster than that gained in leaf. So it was the crucial period for formation of herb medicine Angelica dahurica. Angelica dahurica demanded N most in vegetable growth period, the next were K and P. In seedling period, the Angelica dahurica needed more P;then it needed more N and K. The N absorbed in root was mainly shifted to leaves, while P and K mainly shifted to growth center.In terms of nitrogen fertilizer, phosphate fertilizer, potash fertilizer and organic manure's fertilizer effect, different fertilizers showed different effect on the growth of Angelica dahurica, but they were all in favor of its growth and promoted the yield andquality.Nitrogen fertilizer first promoted the growth of overground part. It increased content of chlorophyll, the concentration and total amount of soluble sugar, soluble protein and starch both in leaf and root, the concentration and accumulation of N in leaf and root, the concentration of coumarine in root and yield. Phosphate fertilizer could reduce the height, root length. While it could increase the moisture content, the concentration and accumulation of N in leaf, the concentration and accumulation of coumarine in leaf and yield. Potash fertilizer was good for plant height, root length , root diameter and dry weight. It could increase the total amount of soluble sugar, soluble protein and starch both in root, the concentration and accumulation of P and K and the accumulation of coumarine in leaf and root, meanwhile reduce the concentration and accumulation of N in root. As to organic manure, it helped to increase the plant height, root length, root diameter and content of chlorophyll. It could increase the total amount of soluble sugar, soluble protein and starch both in leaf and root, the concentration and accumulation of N, P, K in leaf and root, the accumulation of coumarine in leaf and root and yield. Comparing all mentioned above, organic manure showed better fertilizer effect than that of only application of chemical fertilizer.The height of Angelica dahurica showed positive correlation with root length, leaf dry weight and root dry weight and showed negative correlation with concentration of coumarine in leaf and root. The concentration of soluble sugar and starch in leaf showed positive correlation with leaf dry weight. The concentration of soluble protein and soluble sugar in root showed positive correlation with root dry weight. The concentration of soluble protein, soluble sugar in leaf and root showed negative correlation with concentration of coumarine in root.