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

Pengyao Qin, Bin Sun, Zengyuan Li, Zhihai Gao, Yifu Li, Ziyu Yan and Ting Gao
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Pengyao Qin: Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
Bin Sun: Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
Zengyuan Li: Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
Zhihai Gao: Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
Yifu Li: Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
Ziyu Yan: Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
Ting Gao: Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

Sustainability, 2021, vol. 13, issue 6, 1-20

Abstract: 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.

Keywords: drylands; grass yield; sand mobility; degradation condition; utilization pattern (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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