防蚀植被的涵义商榷

论述了现有防蚀植被定义的缺陷,在阐明防蚀植被本质特征的基础上,认为防蚀植被应当是在侵蚀地区,以防止土壤侵蚀或以固沙为目的,植物充分占据地面空间,一般具紧密结构,或者显著具有有机体(枯落物以及生物量)贴地面覆盖特征的植被。进一步分析表明,防蚀植被就是发育良好的自然植被或者接近自然的人工植被,与纯粹追求经济目标的人工植被,不仅在结构上,而且在演替、经营等方面是不同的。还就荒坡问题进行了讨论,认为应当将灌草坡,尤其草坡与真正的荒坡区别开来对待。

Implication of Vegetation Protecting Soil from Erosion

In order to construct efficient vegetation protecting soil from erosion and avoid less efficient vegetation, the present paper evaluates the fault of the current anti-erosion vegetation definitions. Based on clarifying the essence of anti-erosion vegetation structural characteristics, it was considered that vegetation protecting soil from erosion should aim at protecting soil from erosion and fixing sands in erosive areas, ground space fully occupied by plants, in general with close structure, especially with outstanding coverage close to ground by organic matter ( litter and/or biomass). A further analyses showed that anti-erosion vegetation should be natural well developed or near natural, and it would be different not only in structure, but also in succession, management, etc., from artificial vegetation taking economical value as only a target. Finally, this paper also discusses the problem about waste slopes, and it is considered that shrub and/or grass slopes should be distinguished from real waste slopes.