Ecological Responses of Belowground Biomass and Soil Characteristics to Different Grazing Rest Modes in Alpine Meadow-Steppe
Belowground biomasses and soil characteristics of non-grazing during growing stage,non-grazing in summer and non-grazing for the whole year patterns were investigated in the alpine meadow-steppe of Qinghai-Tibet Plateau.The bulk densities,soil compaction,soil water contents,organic matter and root biomasses of the three patterns were compared and analyzed.The results showed that the bulk densities and soil compaction of non-grazing during growing stage pattern were lower than those of non-grazing in summer pattern.The soil water content of non-grazing during growing stage pattern was higher than that of non-grazing in summer pattern.The organic carbon and root biomasses of non-grazing during growing stage pattern were higher than those of non-grazing in summer pattern in the 0～30 cm soil layers.Nongrazing for the whole year pattern made root biomass distribute in the surface layer of soil,while non-grazing in summer pattern significantly increased the root biomass of 10～20 cm soil layer compared to other grazing patterns.Therefore,non-grazing for a short period is one of the main ways of improving production ability and ecological rehabilitation for degraded grassland.
NETL
NSTL
万方数据
维普
