不同水分处理对野生早熟禾种子萌发特性的影响  

Effects of moisture treatments on seed germination characteristics of wild Poa

作　　者：王靖婷[1] 刘自学 白小明[1] 贺佳圆[1] 董沁[1] 吕优伟[1] 

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/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]北京克劳沃草业开发中心,北京100029

出　　处：《草原与草坪》2012年第1期58-62,共5页Grassland and Turf

基　　金：国家科技支撑计划课题(2007BAD52B06);甘肃省自然科学基金项目(0803RJZA035);国家科技基础条件平台工作项目(2004DKA30440)资助

摘　　要：用3%、5%、10%、15%、20%、23%,6个水分处理,研究了水分对8个野生早熟禾种子萌发特性的影响,旨在为野生早熟禾的引种驯化和草坪建植提供依据。结果表明:8个野生早熟禾种子的发芽率、发芽势、发芽指数、苗长、根长和鲜苗重均随土壤含水量的增加呈先增大后下降的趋势;肃南草地早熟禾的发芽率、发芽势和发芽指数在土壤含水量5%时最大,其他7个材料在10%时最大,且显著高于同种其他水分处理(P<0.05);小药早熟禾和硬质早熟禾在土壤含水量10%时幼苗最长,其他6个材料在土壤含水量15%时幼苗最长;土壤含水量5%时8个野生早熟禾的幼根均最长;水分梯度过高或过低都会明显抑制早熟禾的鲜苗重。Seeds of 8 wild Poa materials collected in Gansu Province under different moisture gradients were used study the effect of moisture on germination characteristics in order to provide the basic information for the domestication.The results indicated that the germination rate,germination potential,germination index,seedling height,root length and fresh weight showed a pattern of rising at beginning and then decreasing with the increase of moisture gradients;The germination rate,germination potential and germination index of seeds collected in Sunan were the highest under 5% of moisture,while those of the rest reached the highest under 10% of moisture,and they were significantly higher than other moisture treatments.The seedling height of Poa micrandra and P.sphodylodes were the highest under 10% of moisture,while other reached the highest under 15% of moisture;The root length reached the largest under 5% of moisture;The fresh weight were significantly inhibited when the moisture was too high or too low.

关 键 词：水分 野生早熟禾 种子萌发特性 

分 类 号：S54[农业科学—作物学] S351.1