文献类型：期刊文献

英文题名：Estimation of Grassland Carrying Capacity by Applying High Spatiotemporal Remote Sensing Techniques in Zhenglan Banner, Inner Mongolia, China

作者：Qin, Pengyao[1,2] Sun, Bin[1,2] Li, Zengyuan[1,2] Gao, Zhihai[1,2] Li, Yifu[1,2] Yan, Ziyu[1,2] Gao, Ting[1,2]

第一作者：Qin, Pengyao

通信作者：Gao, ZH[1];Gao, ZH[2]

机构：[1]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[2]Natl Forestry & Grassland Adm, Key Lab Forestry Remote Sensing & Informat Syst, Beijing 100091, Peoples R China

年份：2021

卷号：13

期号：6

外文期刊名：SUSTAINABILITY

收录：;Scopus(收录号：2-s2.0-85103080583);WOS:【SSCI(收录号:WOS:000645805800001)，SCI-EXPANDED(收录号:WOS:000645805800001)】；

基金：This research was supported by "the Fundamental Research Funds for the Central Nonprofit Research Institution of CAF", grant number CAFYBB2020ZB001, Inner Mongolia Autonomous Region Financial Special Project.

语种：英文

外文关键词：drylands; grass yield; sand mobility; degradation condition; utilization pattern

摘要：Overgrazing directly leads to grassland degradation, which is a serious constraint to the sustainable development of animal husbandry. In drylands, grassland biomass is highly heterogeneous in space and time. It is difficult to achieve sustainable utilization of grassland resources by focusing only on the average annual carrying capacity assessment obtained from grass yield. Here, we proposed a novel approach for assessing grassland carrying capacity, taking Zhenglan Banner (County) in Inner Mongolia as the study area. First, monthly grass yield at 30 m spatial resolution was estimated, derived from Carnegie-Ames-Stanford Approach (CASA) model and spatial and temporal adaptive reflectance fusion model (STARFM). Then, based on the degree of sand mobility and degradation condition of typical steppe, the utilization patterns for sandy land and typical steppe in different grazing seasons were developed separately to obtain available grass yield. Finally, the carrying capacity at the Gacha (Village)-scale was estimated and the current livestock carrying status was evaluated to facilitate the grassland refined management. In Zhenglan Banner, the carrying capacity was 237.46 thousand cattle-units in summer. The grassland resources are being overgrazed, with an overload rate of 19.32%. At Gacha-scale, the maximum reasonable stock density was ranged from 0.06 cattle-unit/ha to 0.42 cattle-unit/ha. Fifty-one Gachas exhibited livestock overload. This study is expected to provide technical support and scientific reference data for ecological conservation and grassland management in the study area, as well as in dryland pastoral areas of northern China.