草业科学2016，Vol.33Issue(5)：886-890,5.DOI:10.11829/j.issn.1001-0629.2015-0372
补播对天祝高寒退化草地植被和土壤理化性质的影响
Effects of over-seeding on plant community and soil physical and chemical properties of degraded grassland in Tianzhu County
摘要
Abstract
In order to understand the effects of over-seeding on vegetation composition,soil physical and chemi-cal properties,a field experiment was conducted to determine the effect of over-seeding Elymusnutans,Bro-musinermis,Festuca sinensis seeds on degraded grassland during the period of 2007 to 2009 in Tianzhu county. The results of this study showed that over-seeding increased the aboveground and belowground biomass and in-creased the percentage of sedge and gramineain plant community composition.After three years of over-see-ding,the soil physical,chemical properties and microbial biomass contenthadbeen obviously improved when compared to control,indicating that soil bulk density at 0 ― 20 cm became low,and that porosity,moisture content,nutrient content and microbial biomass content C &N became higher.These implied that the degraded grassland had been improved by over-seeding.关键词
退化草地/补播/土壤理化性质/微生物生物量Key words
degraded grassland/over-seeding/soil physical and chemical properties/microorganism分类
农业科技引用本文复制引用
姬万忠,王庆华..补播对天祝高寒退化草地植被和土壤理化性质的影响[J].草业科学,2016,33(5):886-890,5.基金项目
全球环境基金(GEF)项目“社区发展与草原保护的关系研究”(052456、CHA-GS-Y-5) （GEF）
