Response of Soil Physical Properties and Microbial Quantities to Simulated Trampling on Alpine Meadow
In order to investigate the response mechanism of alpine meadow soil to livestock trampling,the simulated trampling experiment of yak and Tibetan sheep was carried out in Tianzhu.The effects of different simulated trampling density on soil physical property and microbial biomass were studied.The results showed that the soil compaction and bulk density at the 0～ 10 cm depth increased with the increase of trampling intensity;however,the respiration rate and saturated hydraulic conductivity decreased.Meanwhile,the three types of microorganism reduced with the increase of trampling intensity.At the same trampling intensity,the soil compaction and bulk densityof 0～10 cm soil depth under yak trampling were higher than under Tibetan sheep trampling,while the saturated hydraulic conductivity,respiration rate and microbial biomass under yak trampling treatment were lower than Tibetan sheep trampling treatment.The comprehensive analysis showed that the compaction effect on soil was more significant with the increase of livestock trampling intensity.Simulated trampling of one growing season primarily affected the physical properties at the soil depth of 0 to 10 cm;and the compaction effect on soil and inhibitory effect on microorganism distribution of yak were higher than Tibetan sheep.
NETL
NSTL
万方数据
维普
