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Acta Prataculturae Sinica ›› 2026, Vol. 35 ›› Issue (7): 1-14.DOI: 10.11686/cyxb2025297

   

Remote sensing extraction and analysis of the spatial pattern of natural cutting pastures in semi-arid pastoral areas of China

Pu HUANG1,2(), Qing HUANG1,2(), Xiao-ping XIN1,2   

  1. 1.National Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China,Beijing 100081,China
    2.Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China
  • Received:2025-07-17 Revised:2025-09-03 Online:2026-07-20 Published:2026-05-21
  • Contact: Qing HUANG

Abstract:

As a vital component of grassland resources in semi-arid pastoral areas, natural cutting pastures play a significant role in maintaining the stability and sustainable development of grassland ecosystems. However, China has long faced a scarcity of spatial distribution data on natural cutting pastures, and existing data inadequately reflect their current status, hindering scientific management and conservation of grassland resources. To address this issue, this study employed a multi-source remote sensing data fusion approach (Sentinel-2 and Landsat-8 imagery), incorporating topographic features, spectral indices, and texture features. Using object-oriented segmentation and a support vector machine (SVM) algorithm, high-accuracy remote sensing extraction to identify natural cutting pastures in semi-arid pastoral areas was conducted. The results revealed that the total area of natural cutting pastures in semi-arid pastoral areas from 2020 to 2022 was 7.9492 million hectares, with the pastoral area in northern Inner Mongolia accounting for the largest proportion (81.19%), and temperate grasslands being the dominant type (61.87%). The areas of fixed cutting pastures and mobile cutting pastures were 4.7712 million and 3.1780 million hectares, accounting for 60.02% and 39.98% of the total area, respectively, showing distinct regional disparities in spatial distribution. The overall accuracy of remote sensing extraction reached 84.76%, with a Kappa coefficient of 0.69, indicating high consistency with ground survey data. The pastoral area in northern Inner Mongolia achieved the highest accuracy (87.16%). This study fills the gap in spatial distribution data of natural cutting pastures over the past decade and provides reliable data support for the scientific management, ecological conservation, and sustainable utilization of grassland resources.

Key words: semi-arid pastoral areas, cutting pastures, multi-source data fusion, object-oriented segmentation, machine learning model, remote sensing extraction