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土地沙化,并非是单指在风力作用下沙丘前移,而是包括沙丘形成发育、风沙侵袭、水土流失、草原退化、土地盐渍化和人类历史时期在潜在的自然因素基础上,以人为不合理的过度经济活动为主,使原非沙漠地区,由于生态平衡失调,导致生物生产量急剧降低,土地生产潜力衰退,可利用土地资源丧失等所产生的环境退化。 榆林县位于北方农牧交错沙漠化区的南沿,沙区属我国十二大沙区之一的毛乌素沙漠。沙漠化地区涉及20个乡镇,面积达
Land desertification does not refer to the single forward movement of sand dunes under the action of wind but includes the development of sand dunes, sandstorm invasion, soil erosion, grassland degradation, land salinization and human history. Based on potential natural factors, Reasonable and over-economic activities, which will lead to the environmental degradation of the original non-desert areas due to the imbalance of ecological balance, the drastic reduction of biological production, the decline of the potential of land production and the loss of available land resources. Yulin County is located in the north along the desertification of agriculture and animal husbandry in the south along the sand area is one of China’s twelve large sand Wu Mu desert. Desertification involving 20 townships, up to the area