中国沙漠 ›› 1985, Vol. 5 ›› Issue (4): 25-35.

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  1. 中国科学院兰州沙漠研究所
  • 出版日期:1985-12-20 发布日期:1985-12-20

Land Desertification on the Fringe Area of Inner Mongolia Plateau Adjacent Hebei Province and Its Rehabilitation

Yang Taiyun   

  1. Institute of Desert Research, Academia Sinica, Lanzhou
  • Online:1985-12-20 Published:1985-12-20

摘要: 本文对河北坝上沙漠化土地的形成及特点作了初步的分析。认为,坝上沙漠化土地的形成主要是近30年来人类在干旱多风的自然条件下,大量开垦沙质草原引起强烈风蚀所致。沙漠化的主要特点是分布范围广,处于正在发展中和旱作农业风蚀。本文最后提出了坝上地区只有实行"以牧为主",退耕还牧,退耕还林;建立防护林体系以及林、草、田间作;种树种草、恢复植被,改善环境,才是坝上整治沙漠化的根本途径.

Abstract: Land desertification on the Fringe Area of Inner Mongolia Plateau adjacent Hebei Province, excluding 580867 ha. of latent desertified lands, covers 553180 ha. occupying 32.2% of the total land areas in the area,among which the on-going desertified land makes up 71.4% of the total desertified lands in the area; severe desertified land, 27.6% and most severe desertified 1.0%. The desertified lands on the Fringe Area are characterized by their large-scale distribution, unceasing expansion and serious erosion from rain-fed farming. The accurrance of desertified lands in the area is caused by excessive human activities and unfavourable climatic condition -serious drought and frequent winds. It is analyzed that the desertification is caused by following mistakes:a) Unlimited reclamation of sandy steppe and the destruction of steppe vegetation. This process brings much wind erosion and blowout on fragile sandy surface and it is principal factor to cause the problem; b) Uncontrolled growth of populations——human and animal. This' issue gives great pressure to lands and it is referred to as an impact to develop desertification; c) Severe drought and frequent winds are the physical factors to produce risks on lands. The appearrance of desertification in the area brings a serious threaten to agricultural practice and animal industry. It is estimated that 71.4% of cropping land and 43.5% of grazing land have been degradated and desertified. Lower and unstable grain yield and poverty are the results of the problem. It is suggested that the desertified lands can be rehabilitated as following steps:a) To reject and fence the degradated areas for increasing the percentage of plantation and rotation grazing; b) To establish shelterbelts for protecting farmlands and grasslands; c) To develop intercropping practice and agroforestry system; d) To extend reverse and reserve systems on grazing land; e) To encourage artificial plantation of sand-fixing species on the broken surface.