盐碱白僵土与风沙土对羊草克隆构型的影响  

Effect of Saline-alkali White Muscardine Soil and Aeolian Sandy Soil on Clonal Architecture of Leymus chinensis

作　　者：沈振荣 马甜[2,3,4] 

机构地区：[1]宁夏农垦局农业综合开发办,宁夏银川750001 [2]宁夏农垦农林牧技术服务中心,宁夏银川750021 [3]宁夏大学农学院,宁夏银川750021 [4]中国科学院植物研究所,北京100093

出　　处：《宁夏农林科技》2013年第4期46-48,共3页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：宁夏农业综合开发项目"不同生态类型区牧草新品种关键种植技术示范与推广-引进羊草新品种生长适应性及不同种植技术筛选"

摘　　要：以不同生境条件(盐碱白僵土与风沙土)人工栽培羊草BG、BG-2、B、Y1群体为研究对象,研究了盐碱白僵土与风沙土的羊草克隆构型差异。结果表明:在盐碱白僵土上人工种植羊草的分蘖株平均间隔子长度、根茎节间长度、根茎分枝角度均比风沙土羊草大,促使羊草根系分散型分布;风沙土3种构件值较小,促使羊草根系集中型分布。分散性分布使羊草分蘖株避过盐碱加重的土壤斑块,避免了高浓度盐碱对羊草根系生长的危害。A study was made on the difference between the clonal architectures of Leymus chinensis grown on saline-alkali white muscardine soil and on aeolian sandy soil with the BG group,BG-2 group,B group and Y1 group of artificially cultivated Leymus chinensis under different habitat conditions（saline-alkali white muscardine soil and aeolian sandy soil） as the objects of study.The results showed that the tiller average interval length,rhizome internode length and rhizome branching angle of the artificially cultivated Leymus chinensis on saline-alkali white muscardine soil were all higher than those of the Leymus chinensis on aeolian sandy soil and this had promoted the dispersive distribution of the root of the Leymus chinensis.The component values with the aeolian sandy soil were relatively small and this had promoted the centralized distribution of the root of the Leymus chinensis.The dispersive distribution had made the Leymus chinensis tillers avoid the soil patches of aggravated salinity and thus the harm of high concentrated salinity on the growth of root system of the Leymus chinensis was avoided.

关 键 词：羊草 克隆构型 白僵土 风沙土 

分 类 号：S543.9[农业科学—作物学]