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水土保持的核心任务是防治土壤侵蚀 ,植物措施能有效地控制水土流失 ,因此水土流失区植被的恢复和建造成为水土保持工作的重心之一。植被盖度是衡量植物群落水土保持功能大小的一个重要质量指标 ,潜势盖度、有效盖度和临界盖度是植物恢复过程中的三个重要标准。较详细地论述了三个盖度的含义 ,并举例说明了有效益度、临界盖度的确定方法。
The core task of soil and water conservation is to control soil erosion, and plant measures can effectively control soil erosion. Therefore, the restoration and construction of vegetation in soil and water loss areas become one of the focuses of soil and water conservation. Vegetation coverage is an important quality index to measure the function of soil and water conservation in plant community. Potential cover, effective cover and critical cover are three important criteria in plant restoration. The meaning of three covers is discussed in detail, and the method of determining the effective cover and the critical cover is illustrated.