放牧强度对内蒙古典型草原土壤磷素的影响  

Effects of grazing intensity on soil phosphorus in typical grassland of Inner Mongolia

作　　者：卢晓霞 张卫青[1,2] 王海茹 于红博[1] 万志强 LU Xiaoxia;ZHANG Weiqing;WANG Hairu;YU Hongbo;WAN Zhiqiang(College of Geographical Sciences,Inner Mongolia Normal University,Hohhot 010022;Key Laboratory of Climate Change and Regional Response in Mongolian Plateau,Hohhot 010022,China)

机构地区：[1]内蒙古师范大学地理科学学院,呼和浩特010022 [2]蒙古高原气候变化与区域响应高校重点实验室,内蒙古师范大学,呼和浩特010022

出　　处：《干旱区资源与环境》2022年第5期153-159,共7页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(42161023,41661009);内蒙古自治区自然科学基金(2020MS04002,2021BS03024)资助。

摘　　要：以内蒙古阿巴嘎旗典型草原为研究区,在长期轻度、中度和重度放牧3个放牧草场采集0-30cm深度土壤样品,并以禁牧17a的草场样品为对照,通过实验室测试并分析2010和2016-2021年土壤速效磷和全磷含量的变化及其影响因素。结果表明,绝大多数年份的土壤速效磷含量随着放牧强度的增加而减小,随着土层深度的增加而降低;而土壤全磷含量不随放牧强度变化。相关分析显示,放牧强度与土壤速效磷含量呈显著负相关(P<0.05),与全磷无显著相关性。可见,重度放牧不利于土壤速效磷的积累。Taking the typical grassland of Abaga banner in Inner Mongolia as the study area,soil samples with a depth of 0-30 cm were collected from three grazing pastures with light,moderate and heavy long-term grazing,and compared with the grassland samples banned for 17 years.The changes and influencing factors of soil available phosphorus and total phosphorus contents in 2010 and 2016-2021 were tested and analyzed in the laboratory.The results showed that the content of soil available phosphorus decreased with the increase of grazing intensity and soil depth in most years.Soil total phosphorus content did not change with grazing intensity.Correlation analysis showed that there was a significant negative correlation between grazing intensity and soil available phosphorus content(P<0.05),but there was no significant correlation with total phosphorus.It can be seen that heavy grazing is not conducive to the accumulation of soil available phosphorus.

关 键 词：放牧强度 典型草原 土壤速效磷 土壤全磷 

分 类 号：S812.2[农业科学—草业科学]