家畜生态学报2024，Vol.45Issue(7)：41-49,9.DOI:10.3969/j.issn.1673-1182.2024.07.007
放牧强度对新疆伊犁托乎拉苏草原土壤理化性质的影响
Effects of Grazing Intensity on Soil Physical and Chemical Properties of Yili Tuohulasu Grassland in Xinjiang
摘要
Abstract
Grazing is an important utilization and management method of grassland.To explore the effects of grazing intensity on soil physical and chemical properties of Yili grassland,this study selected Yili Tuohulasu grassland of Xinjiang as the research object.Different grazing intensities were set up,the control(CK)without grazing intensity,light grazing(LG),moderate grazing(MG)and heavy grazing(HG),and the corresponding stocking rate levels were 0,0.45,1.35 and 2.50 sheep/hm2,respectively.After two years of grazing,soils of 0-20 cm and 20-40 cm were collected for the detection of soil bulk den-sity,pH,organic matter,nitrogen,phosphorus and potassium,to explore the appropriate grazing intensi-ty.The results showed that:(1)soil bulk density and pH in all soil layers showed a trend of initially de-creasing and then increasing with grazing intensity.(2)With the increase of grazing intensity,soil organic matter content in 0-20 cm showed a fluctuation,soil organic matter content in 20-40 cm exhibited a single peak,and soil cumulative organic carbon storage in 0-40 cm displayed a U-shape trend.(3)The total nitro-gen and available phosphorus in 0-20 cm also showed a U-shape trend with grazing intensity.Available po-tassium in 0-20 cm soil,and total nitrogen and available potassium in 20-40 cm soil exhibited a single-peak growth trend.The content of available phosphorus at 20-40 cm fluctuated.(4)The quadratic equation fit-ting between grazing intensity and soil indexes demonstrated that the optimal livestock carrying capacity was within the range of 1.09-1.89 sheep/hm2,and the average optimal livestock carrying capacity was 1.44 sheep/hm2.Therefore,from the perspective of soil physical and chemical properties,moderate graz-ing is more suitable for Yili Tuohulasu grassland in Xinjiang.关键词
放牧强度/载畜量/托乎拉苏草原/土壤/理化性质Key words
grazing intensity/livestock carrying capacity/Tuohulasu grassland/soil/physical and chemical properties分类
农业科技引用本文复制引用
武玉鑫,梁飞,崔东,刘文新,刘淑琪,吕立琴,刘璇,黄菊英..放牧强度对新疆伊犁托乎拉苏草原土壤理化性质的影响[J].家畜生态学报,2024,45(7):41-49,9.基金项目
第三次新疆综合科学考察(2022xjkk20220405) （2022xjkk20220405）
伊犁师范大学提升学科综合实力专项自科重点项目(22XKZZ01) （22XKZZ01）
