无定河中游左岸监测区潜伏的土壤退化问题及其对策研究

对无定河中游左岸监测区流域内农林业生产基地及主要农业作物进行详细调研与监测,选取不同地形结构(坡地、梯田和坝地)、不同措施配置(乔木林、灌木林)等10种农业用地的地类,进行土壤理化指标监测.对不同地形结构、不同措施配置下土壤理化指标,特别是水分的变化状况的监测结果进行横向和纵向2个层面分析,发现各种地类的各类指标均存在着不同水平的退化趋势,在广大的黄土丘陵沟壑区,水土流失不仅造成土壤水分减少,而且是土壤退化最活跃的因素,严重降低了水分利用率.通过对区域土壤性质,尤其是土壤退化及其内在危害、成因和可持续利用途径的研究,发现开发精耕细作高效种植,遵循自然规律有效配置植被可以防止水土流失和土壤退化,提高土壤入渗和持水能力.在开展无定河中游左岸区域进行监测的过程中,积累了比较丰富的监测数据.取得的这些基础资料和采用的监测方法是今后开展生态建设项目监测的重要技术依据.

Research on the latent problems and countermeasures of soil degradation in the Wuding river middle reaches area on the left bank monitoring

In this paper, a detailed investigation of the Wuding River Basin in the middle reaches of the river left bank monitoring area of agricultural production base of forestry and the main agricultural crops in, choose different topographic structure (slope, terrace and dam), different measures configuration (arbor, shrub) and other 10 kinds of agricultural land into land type, soil physicochemical index monitoring, and the monitoring results are analyzed with two horizontal and vertical level, find all kinds of index of each class there are the trend of degradation of different level, and proposes 3 measures to solve the problem.