Study On Effects Of Different Nitrogen Forms And Ratioes On Yield And Quality Of Ligusticum Chuanxiong

With the seed of Shuimo town of Wenchuan County of Sichuan as the material,a field experiment in Dujiangyan and a pot experiment in Ya' an were conducted to study the effect of different nitrogen forms and ratioes on growth,dry mass allocation,nitrate reductase,the content of NPK in different position,yield,quality and the underground stem of Fe,Zn,Cu,Mn,Cd,Mg and Ca content.The results showed the following aspects:1.The plant height,stem number and root length were effected by different Nitrogen forms and ratioes to some extent.Compared with other treatments,The treatment N6(50% NO₃^--N+50%NH₄^--N) was better in promoting root and increasing the stem number than other treatments,the best effect of promoting plant height was treatment N4 and N5, secondly was N3å’ŒN6.This was the breed base of yield and quality of Ligusticum chuanxiong which was effected by nitrogenous fertilizer.2.The content of chlorophyll,nitrate reductase,Peroxidase and malondialdehyde were increased to some extent by using the nitrogenous fertilizer,the Chlorophyll content of the mix of NO₃^--N and NH₄^--N was higher than other treatments which was the single application of NO₃^--N,NO₃^--N or amide nitrogen.In addition,the highest content of nitrate reductase was treatment N6.This was the physiology base of yield and quality of Ligusticum chuanxiong which was effected by nitrogenous fertilizer.3.The nitrogen concentration was increased significantly by nitrogenous fertilizer, the underground part was increased faster than the ground part,the nitrogen concentration of the mix of NO₃^--N and NH₄^--N was higher than other treatments which was the single application of NO₃^--N,NO₃^--N or amide nitrogen,in addition,the content of the whole potassium and phosphonium can be increased by the proper application of nitrogenous fertilizer.This was the nutrient base of yield and quality of Ligusticum chuanxiong which was effected by nitrogenous fertilizer.4.The dry mass allocation especially the underground part was increased significantly by nitrogen fertilizers,so the ratio of root-shoot was also improved.The dry mass allocation and the ratio of root-shoot of the mix of NO₃^--N and NH₄^--N was higher than other treatments which was the single application of NO₃^--N,NO₃^--N or amide nitrogen.This was the mass base of yield and quality of Ligusticum chuanxiong which was effected by nitrogen fertilizers5.The content of the mineral elements of the rhizome of Ligusticum chuanxiong was effected by different Nitrogen forms and ratioes,the content of Fe,Zn,Cu,Mn,Mg,Ca, and Cd were increased significantly by treatment N2,N3 and N1,the content of Cu was declined and the content of Fe,Mn,Mg,Ca,Cd were increased by the application of the mix of NO₃^--N and NH₄^--N.6.The yield was increased significantly by nitrogenous fertilizer.The yield of treatment N6(50%NO₃^--N+50%NH₄^--N) was the maximal in all treatments,which was increased 27.29%than treatment CK.secondly,the yield of treatment N5 (75%NO₃-N+25%NH₄-N) and N4(25%NO₃-N+75%NH₄-N) was also respectively increased 22%and 20.76 than treatment CK.7.The quality was also effected by different nitrogen forms and ratioes to some extent.The highest content of Total ferulic acid was treatment N4,secondly was N5,N6 and N3.The highest content of Total alkaloid was treatment N3 and N5,secondly was N2, N1 and N6...