摘要
本文通过对藏南湖泊佩枯措湖区植被和土壤的调查,分析了环湖周边土壤主要养分元素的分布特征,探讨了佩枯措湖区不同空间的土壤养分状况与规律。研究结果表明:佩枯措湖区土壤养分总体为贫瘠,土地的可利用程度不高。除有机质外全部速效及全效养分(P、K、N)皆处于缺乏状况,土壤偏碱性。养分元素空间分布差异大,P、K元素最为缺乏。整个湖区来看,湖尾区域的土壤养分最低。各土层各养分元素含量有差异,速效P、速效K含量随土层深度递减,且上层与中、下层差异显著,其他养分元素随土层的变化规律不明显。湖中部土壤速效养分(P、K、N)以及全N、有机质含量大于湖尾和湖首。湖尾全(P、K)含量大于湖中。根据研究结果,应根据湖区实际环境情况采用不同手段和措施开展相应的保护工作,为该地区的生态环境保护工作提供科学依据,为西藏的生态文明与生态安全屏障建设提供借鉴。
Based on the investigation of vegetation and soil in Peiku Tso Lake in southern Tibet, the distribution characteristics of main nutrient elements in the soil around the lake were analyzed, and the soil nutrient status and its regularity in different space of Peiku Tso Lake were discussed in this paper.The results showed that the soil nutrients in Peiku Tso Lake area were generally poor, and the availability of land was not high.Except organic matter, all available nutrients and fully effective nutrients (P, K, N) were deficient, and the soil was alkaline.The spatial distribution of nutrient elements varied greatly, and P, K elements were the most scarcest.The soil nutrients in the lake tail area were the lowest.Contents of nutrient elements in different soil layers were different.Contents of available P and K decreased with the depth of soil layer, and the difference between upper layer and middle and lower layer was significant.The variation of other nutrient elements with soil layer was not obvious.Soil available nutrients (P, K, N), total N and organic matter contents in the middle of the lake were higher than those in the tail and head of the lake.The content of P and K in the tail of the lake was higher than that in the middle of the lake.Based on the research results, measures should be adopted to protect the lake area according to the actual environmental conditions.The research will also provide a scientific basis for the eco-environmental protection in this area as well as a reference for the construction of eco-civilization and security barrier in Tibet.
作者
赵津仪
莽杨丹
袁敏
王威威
薛会英
罗大庆
ZHAO Jinyi;MANG Yangdan;YUAN Ming;WANG Weiwei;XUE Huiying;LUO Daqing(Res.Institute of Tibet Plateau Ecology,Tibet Agriculture&Animal Husbandry University;National Key Station of Field Scientific Observation&Experiment of Alpine Forest Ecology System in Nyingchi Tibet;Key Laboratory of Forest Ecology of Tibet plateau,Ministry of Education;Resources&Environment College,Tibet Agriculture&Animal Husbandry University,Nyingchi Tibet 860000,China)
出处
《高原农业》
2019年第5期484-492,共9页
Journal of Plateau Agriculture
基金
西藏自治区科技重大专项项目（Z2016C01G01/03）
国家重点研发计划课题（2016YFC0502006）
西藏特色农牧资源研发协同创新中心-高原生态平台联合资助
西藏农牧学院研究生创新计划项目（STX2018-13）
关键词
佩枯措
土壤养分
PH
有机质
Peiku Tso
soil nutrient
pH
organic matter
