安徽农业科学2024，Vol.52Issue(22)：151-156,6.DOI:10.3969/j.issn.0517-6611.2024.22.032
不同施氮处理对西藏绿肥植物幼苗根系生长的影响
Effects of Different Nitrogen Application Treatments on Root Growth of Green Manure Plants Seedlings in Xizang
摘要
Abstract
To study the effect of nitrogen fertilizer on the root system of green fertilizer plants in Qinghai-Tibet Plateau,green manure plants(alfalfa and Vicia sativa)were used as experimental materials in pot experiments with different nitrogen application levels(0,0.06,0.12,0.18,0.24,0.30 g/dm2)in Xizang University of Agriculture and Animal Husbandry.The effects of different nitrogen application treatments on root characteristics of green manure plants were studied.The results showed as follows:the root length,projected area,area,surface area,volume and branch number of alfalfa showed a trend of first decreasing,then increasing and then decreasing under different nitrogen application levels,and the changes were the largest under N5 treatment(0.30 g/dm2),which were higher than those in the control group.The number of root tips of Vicia sativa decreased first,then increased and then decreased.Root length,root projection area,root area,root surface area,root volume and root branching number showed a trend of first gradually increasing,then decreasing and then increasing.Root growth of Vicia sativa was signifi-cantly affected when common vetch was more than 0.18 g/dm2(N3 treatment).In general,for alfalfa,the effect of low nitrogen level on root growth was not obvious,and high concentration of nitrogen was helpful to promote the growth of plant roots.Root growth of Vicia sativa was sig-nificantly affected by overapplication of nitrogen fertilizer.Therefore,the appropriate nitrogen concentration should be controlled in the growth management of green manure plants to achieve the best production benefits.The results provide a theoretical basis for the improvement of nitro-gen fertilizer application technology in Tibet,and also provide a scientific reference for the large-scale cultivation of alfalfa and Vicia sativa.关键词
施氮/紫花苜蓿/箭筈豌豆/根系生长Key words
Nitrogen application/Alfalfa/Vicia sativa/Root system growth分类
农业科技引用本文复制引用
赵帅,代雪,柏要强,刘贤,王瑶..不同施氮处理对西藏绿肥植物幼苗根系生长的影响[J].安徽农业科学,2024,52(22):151-156,6.基金项目
西藏自治区教育厅"农业资源与环境"优势特色专业建设项目 （）
西藏农牧学院校级教改项目 （）
西藏自治区高校人文社会科学研究项目. （）
