典型草原封育过程中植物凋落物的变化动态  

Dynamics of plant litter of typical steppe under enclosure management in Inner Mongolia Autonomous Region

作　　者：阚雨晨[1] 王堃[2] 王宇通[2] 黄欣颖[2] 邵新庆[2] 

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,甘肃兰州730070 [2]中国农业大学动物科技学院,北京100193

出　　处：《草原与草坪》2011年第4期25-29,共5页Grassland and Turf

基　　金：国家科技支撑项目(2008BAD95B03);公益性行业(农业)科研专项(200903060;201003061);国家牧草产业体系项目(CARS-35)资助

摘　　要：以内蒙古巴林右旗退化草原为研究对象,采用直接收集的方法,研究各种围封条件下,退化草原在自然演替过程中土壤凋落物的变化动态。结果表明:典型草原在封育演替过程中,凋落物呈增加的趋势,以封育10年的凋落物量最高;凋落物的养分,不同年限之间均存在显著差异,其中碳素含量以封育1年的最高,封育10年的最低,氮素则是以封育4年的含量最高,封育1年的含量最低;C/N比值随封育年限的增加呈现降低的趋势。A field experiment was conducted in a degraded area of typical steppe ecotype in Balinyou Banner, Inner Mongolia Autonomous Region,China to reveal the dynamics of plant litter, using direct collection. The result show that the plant litter shows an increasing trend in different enclosed sucession process,the litter in the first 10 year is the highest. Litter nutrients,in different years, there were significant differences. Carbon content of maximum 1 year fencing,fencing a minimum of 10 years, and nitrogen is based on 4 years of enclosure was the highest content of fencing a minimum 1 year, they were significantly different among. Carbon and nitrogen ratio increases with the enclosure years showed decrease.

关 键 词：典型草原 恢复 围封 植物凋落物 

分 类 号：S812[农业科学—草业科学]