荒漠草原核心区水热分布格局与自然放牧对群落地上生物量的影响  

Influence of natural grazing and water-heat distribution pattern on the aboveground biomass in the core area of Desert Steppe

作　　者：邵惠敏 那日苏[2] Shao Huimin;Narisu(Agricultural and Animal Husbandry Technology Extension Center of Huhunbuir,Hailar,021008,China;Institute of Grassland Research of CAAS,Huhhot 010010,China)

机构地区：[1]呼伦贝尔市农牧技术推广中心,内蒙古海拉尔021008 [2]中国农业科学院草原研究所,内蒙古呼和浩特010010

出　　处：《草原与草业》2022年第1期33-37,共5页Grassland and Prataculture

基　　金：国家自然科学基金项目(41271322)。

摘　　要：以内蒙古苏尼特右旗为例,在不同水热空间上分布的放牧压力相近四户牧民的草场为研究对象,对内蒙古荒漠草原核心区不同水热空间分布格局下自然放牧对草原群落地上生物量影响进行分析。结果表明:荒漠草原不同水热分布区内部的植物群落地上生物量分布格局不同,离居民点越远植物群落生物量相对越高,居民点棚圈附近群落地上生物量和远离棚圈的牧场边缘群落地上生物量之间差异显著,只有高温低湿区牧户草场地上生物在空间上差异不显著;而荒漠草原不同水热分布区之间的比较发现,其植物群落地上生物量分布格局也不同,在自然放牧状态下年均气温偏低区域的荒漠草原植物群落地上生物量大于年均气温偏高的荒漠草原植物群落地上生物量,并且差异显著。Taking Sunite Right Banner of Inner Mongolia as an example,four herdsmen's grasslands with similar grazing pressures in different water-heat spaces were studied to analyze the effects of natural grazing on aboveground biomass of steppe communities under different water-heat spatial distribution patterns in the core area of desert steppe.The results showed that the aboveground biomass distribution pattern of plant communities in different water-heat distribution areas of desert steppe was different.The farther away from the residential area,the higher the aboveground biomass was,The spatial difference of aboveground biomass in high temperature and low humidity area was not significant.The comparison among different water-heat distribution areas in the desert steppe showed that the aboveground biomass distribution patterns were different.Under the natural grazing conditions,the aboveground biomass in the lower average annual temperature area was significantly higher than the area with high average annual temperature.

关 键 词：荒漠草原 水热空间分布 放牧压力 生物量 

分 类 号：Q948.1[生物学—植物学]