中国药房2016，Vol.27Issue(31)：4353-4356,4.DOI:10.6039/j.issn.1001-0408.2016.31.10
玄参不同生长期氮、磷、钾的积累与分配特点研究
Study on the Accumulation and Distribution Characteristics of Nitrogen,Phosphorus and Potassium of Scrophularia ningpoensis at Different Growth Stages
摘要
Abstract
OBJECTIVE:To study the accumulation and distribution characteristics of nitrogen(N),phosphorus(P)and potas-sium(K)in Scrophularia ningpoensis at different growth stages,in order to provide theory evidence for the establishment of scien-tific fertilization technique for S. ningpoensis. METHODS:In field testing,through the dynamic sampling of S. ningpoensis at seed-ling stage,stem and leaves growth stage,root enlargement stage and root enrichment stage,the contents of N,P and K were mea-sured,and the accumulation and distribution regularity of N,P and K in stem,leaves,root,rhizome and bud were also studied. RESULTS:The accumulation of mineral elements in seedling stage of S. ningpoensis was less,the absorptive capacity of N,P and K accounted for 13.8%,13.2%,14.0% of the whole growth periods;the plants grew vigorously at stem and leaves growth stage, root enlargement stage,and the absorptive capacity of N,P and K accounted for 86.2%,85.2%,86.0% of the whole growth peri-ods;the plants drooped and languished at root enrichment stage,and the absorptive capacity of N,P and K appeared a downward trend. The allocation proportion of N,P and K at seedling stage,stem and leaves growth stage and root enlargement stage were al-ways leaf>stem>root>rhizome>bud,especially focusing on stem and leaves. In the later period of root enlargement,roots re-placed the aerial part of plants to be the center of growth,and the accumulation of N,P and K shifted from the stem and leaves to the roots. During growth period,the demand of N and K were the highest,followed by P. The dry weight of S. ningpoensis was positively correlated with the total accumulation of N,P and K(R2 were 0.844,0.959,0.827). CONCLUSIONS:The stem and leaves growth stage and root enlargement stage are the most crucial period of the absorption of N,P and K. It should be paid more attention to the supply of mineral nutrition to meet the requirement of plant. Under medium nutrition condition,the average N,P and K absorption amount per 100 kg try medicine are 7,0.73 and 6.5 kg respectively.关键词
玄参/氮/磷/钾/积累/分配/生长期Key words
Scrophularia ningpoensis/Nitrogen/Phospho-rus/Potassium/Accumulation/Distribution/Growth stage分类
医药卫生引用本文复制引用
张雪,陈大霞,李隆云,孙年喜..玄参不同生长期氮、磷、钾的积累与分配特点研究[J].中国药房,2016,27(31):4353-4356,4.基金项目
国家科技支撑计划课题（No.2011BAI13B02-2）；重庆市卫生和计生委中医药科技项目（No.zy201402132）；重庆市科技研发基地项目（No.cstc2014ptyjd10001）；重庆市集成示范计划项目（No. cstc2015jcsf10013）；重庆市科技惠民计划项目（No.2013GS500102-D2014-1）；科技富民强县专项行动计划项目 （）
