利用草地早熟禾改建江河源区“黑土型”退化草地的研究  

Study on vegetation rebuilding of "black soil type" degraded grassland with Poa pratensis in the riparian areas of rivers

作　　者：文金花[1] 马玉寿[1] 施建军[2] 董全民[2] 王彦龙[2] 

机构地区：[1]甘肃农业大学草业学院,甘肃兰州730070 [2]青海省畜牧兽医科学院,青海西宁810016

出　　处：《草原与草坪》2006年第2期41-44,共4页Grassland and Turf

基　　金：国家"十.五"攻关项目(2001BA606A-02);教育部博士学科点专项科研基金(20040733004)

摘　　要：利用正在驯化选育中的野生草地早熟禾,进行了“黑土型”退化草地植被改建试验,结果表明:在海拔4 000 m的地区野生和人工栽培条件下草地早熟禾种子均能成熟;具有较强的有性繁殖和无性繁殖能力,在栽培条件下能形成良好的草皮和植被覆盖度;草地早熟禾人工草地土壤总体含水能力增强,物理性状改善;地上植物量显著高于原生植被,达到了垂穗披碱草人工草地水平;实验室研究发现,草地早熟禾具有很强的抗寒性。可见草地早熟禾是三江源区“黑土型”退化草地植被改建的优良草种。The six-year ＂black soil type＂ degraded grassland revegetated with wild Poa pratensiswas used to carry out the vegetation rebuilding experiment. The results showed that the seeds of Poa pratensis were curing under natural and cultivating conditions in the region where the altitude was around 4 000 m;the potency of sexual propagation and asexual propagation were excellent and it could form a fine sod and vegetable cover; the total capacity of soil and water conservation of Poa pratensis artificial grassland was increased and the soil physical characteristic was improved as well; the aboveground phytomass was higher than native vegetation and could reach the level of Elymus nutans artificial grassland;the cold resistance of Poa pratensis was strong. It could be concluded that it was a superior species for vegetation rebuilding of the ＂black soil type＂ degraded grassland in the riparian areas of the Changjiang River,Lantsang River and Yellow River.

关 键 词：草地早熟禾 “黑土型”退化草地 植被改建 三江源区 

分 类 号：S54[农业科学—作物学] S812.8