【摘 要】
：
本文对干旱区内陆河流域下游具有代表性的渭干河-库车河三角洲绿洲土地资源特征和存在的问题进行了详细的分析,分析表明,土地资源数量大、质量差、利用率低,土壤类型多;草场
【机 构】
：
新疆师范大学生命与环境科学学院,乌鲁木齐市第十四中学
论文部分内容阅读
本文对干旱区内陆河流域下游具有代表性的渭干河-库车河三角洲绿洲土地资源特征和存在的问题进行了详细的分析,分析表明,土地资源数量大、质量差、利用率低,土壤类型多;草场面积大、质量差;森林覆盖率低、疏林、灌木林比重大;土地利用中存在结构不合理,特别是林业、畜牧业比重偏低,绿肥和饲料作物面积过小;土壤次生盐渍化严重、土壤肥力下降,经营管理粗放、单产水平不高;草场面积锐减,森林资源破坏严重,保护绿洲的能力下降.在此基础上,提出了优化农业用地结构,提高土地利用综合效益;增加对农业用地开发利用的投入,促进农业用地由粗放型向集约型的转变;保护和更新胡杨林;保护和建设草场;大力治理盐碱;发展节水灌溉农业,提高水资源利用效益;扩大绿洲规模,加快城市化建设等持续合理利用土地资源的对策.
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