草业学报2024，Vol.33Issue(12)：1-12,12.DOI:10.11686/cyxb2024050
不同放牧管理下祁连山区冬季牧场植被-土壤协同耦合效应评价
Evaluation of vegetation-soil synergistic coupling in winter rangeland of the Qilian Mountains under different winter grazing management systems
摘要
Abstract
The degree of synergistic coupling of the vegetation-soil system serves as a comprehensive evaluation index to measure the complementarity and integration of grassland ecosystem components,and is an important tool in implementing the quantitative management of grassland.This study was conducted in Yeniugou Township,Qilian County,Qinghai Province,and three different grazing management systems were compared:all feed from grazing in winter,winter grazing+supplemental feeding,and winter enclosure(no grazing).We constructed an evaluation system composed of vegetation factors and soil factors,and used the entropy power method to determine the weight of each index,and formulated a model to score the degree of synergistic coupling of the vegetation-soil system.It was found that there were significant differences in the Shannon-Wiener index and Patrick richness index of vegetation communities under the different grazing managements,and the grassland in the grazing+supplementary forage winter feeding system had the highest score,while that where grazed grassland comprised the total feed supply had the lowest score.There were significant differences in the contents of soil total carbon,total nitrogen,total phosphorus,ammonium nitrogen,nitrate nitrogen,available potassium,and available phosphorus with different grazing management,and the highest soil system score was found in the grassland with no winter grazing,and the lowest in the grazed grassland with no feed supplementation.The score for the degree of synergistic coupling under the different grazing management systems ranked:enclosure(0.510)>grazing+supplementary feeding(0.482)>all feed from grazing(0.397).For the above three winter grazing systems,the grassland ecosystem could be categorized,respectively,as'barely coordinated vegetation-soil system lacking development','bordering on disordered vegetation-soil coordination lacking development',and'mildly disordered vegetation-soil coordination with development recession'.In conclusion,winter enclosure of animals with no grazing by animals of grassland in the Qilian Mountain area was the most conducive to the health and stability of the ecosystem,among the three grazing systems evaluated,but still exhibited a less than optimal level of vegetation-soil coordination.关键词
祁连山/放牧管理/植被-土壤系统/协同耦合效应Key words
Qilian Mountains/grazing management/vegetation-soil system/synergistic coupling effects引用本文复制引用
于泽航,俞旸,曹铨,刘玉祯,冯斌,张小芳,董全民..不同放牧管理下祁连山区冬季牧场植被-土壤协同耦合效应评价[J].草业学报,2024,33(12):1-12,12.基金项目
基于飞地经济的时空耦合型生态畜牧业技术研发和模式创新(2022-NK-134)资助. （2022-NK-134）
