Soil water carrying capacity for vegetation

Nonnative plantations can effectively conserve soil and water improve the ecology environment, but desiccation occur may become severe in forest grass lands water-limited regions, leading to degradation, vegetation decline, crop failure. Therefore, it is necessary regulate changing relationship between plant growth water. However, there no universally accepted theory provide guidance sustainable use of resources, management forests, production crops such regions. The regulation regions be expressed by resources limit (SWRULP) carrying capacity for (SWCCV) indexes. SWCCV population a or density indicator plants community when supply equal consumption root zone at given time, changes with type, location, time. For example, SWRULP caragana shrubland 222.8 71 bushes per 100 m2 semiarid region. degree coverage, productivity, benefits quantity an equals provides theoretical basis ensuring development land.