不同氮素水平对接种根瘤菌紫花苜蓿生长特性的影响  

Effects of different nitrogen levels on the growth characteristics of alfalfa inoculated with rhizobium

作　　者：蒯佳林[1] 刘晓静[1] 李文卿 

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心/甘肃省草业工程实验室,甘肃兰州730070 [2]天水市政府,甘肃天水741000

出　　处：《草原与草坪》2011年第3期56-59,63,共5页Grassland and Turf

基　　金：甘肃省科技厅自然科学基金(1010RJZA157);农业部行业专项"甘肃牧区优质高效饲草生产利用技术研究与示范"(201003023)资助

摘　　要：采用砂培试验方法,研究了不同氮素水平(N0、N105、N210、N315和N420)接种12531和LW107根瘤菌对甘农3号紫花苜蓿生长特性的影响。结果表明:紫花苜蓿的株高随氮素水平增加呈先增加后趋于稳定的趋势;紫花苜蓿单株叶片数、单叶面积、地上部和地下部干重、根冠比均随氮素水平的增大呈先增加后降低趋势;紫花苜蓿的根长随氮素水平的增大呈下降的趋势。总体表明,当氮素水平为210 mg/L时,甘农3号紫花苜蓿生长较好。The sand culture was used to study the effects of different nitrogen levels（N0,N105,N210,N315 and N420）on the growth characteristics of alfalfa（cultivar No.3,Gannong）inoculated with rhizobia 12531 and LW107.The results showed that plant height increased firstly and then stabilized as the increase of nitrogen lev-els.The number and area of leaf per plant,shoot and root dry weight,root/shoot ratio,and root length increased firstly and then declined as the increase of nitrogen levels.In general,there was a good growth of alfalfa（cultivar Gannong 3）with the nitrogen level at 210 mg/L.

关 键 词：紫花苜蓿 氮素水平 生长特性 

分 类 号：S551.706[农业科学—作物学]