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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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北方土石山区的土地压力及其缓解途径
DOI: 10.11821/xb201004009, PP. 476-484
Keywords: 土地压力,缓解途径,生态建设,北方土石山区
Abstract:
以北方土石山区27个小流域样本数据为基础,针对流域粮食生产、经济发展和生态保护对土地的需求,构建了土地压力定量评估方法,评估了各流域的土地压力,并将其与实际土地生产力进行了比较,进而从各小流域的经验事实中提取出使两者平衡的有效途径。结果表明,土地压力在空间上具有非均衡性,但相对于土地生产力的相对土地压力则存在空间均衡化的趋势。2000年前后,只有76%的样本小流域能够支撑人均300kg/a的粮食生产压力,只有约20%的样本小流域能够支撑其经济发展压力,但这些小流域的土地压力最终都得到了有效缓解。劳动力转移、发展经济林果和特色产业等是缓解上述压力的主要途径。
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