华北农牧交错带不同土地利用类型的土壤养分特征:以张北县为例  

Effects of land use type on soil nutrient elements in the agro-pastoral ecotone of north China:A case study in Zhangbei County

作　　者：张怡颖 谷丰 刘泉[1] 周明华[2] ZHANG Yiying;GU Feng;LIU Quan;ZHOU Minghua(School of resources and Environment Engineering,Mianyang Teachers’College,Mianyang 621000,Sichuan,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,Sichuan,China)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621000 [2]中国科学院、水利部成都山地灾害与环境研究所,四川成都610041

出　　处：《草业科学》2020年第7期1239-1248,共10页Pratacultural Science

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07101001);中国科学院战略性先导科技专项(A类)(XDA23090403)。

摘　　要：本研究以华北农牧交错带旱地、水浇地、草地和林地4种土地利用类型为研究对象,测定分析了0-15和15-30 cm土层土壤有机质、全氮、全磷、速效钾、有效铁、有效锰、有效铜和有效锌等营养元素含量差异及其影响因素。结果表明:1)土壤有机质、全氮和全磷含量从大到小依次为水浇地、草地、林地和旱地,而土壤有效钾含量从大到小依次为水浇地、林地、旱地和草地;水浇地土壤有机质、全氮、全磷和土壤有效钾含量均最高,分别为43.42、2.62、2.86和444.00 g·kg^-1。2)不同微量元素对土地利用类型的响应不同,但水浇地土壤有效铁、有效锰、有效铜和有效锌含量在4种土地利用类型中均较高,分别达到11.45、15.21、0.59和2.04 mg·kg^-1。3)土壤养分含量与土壤颗粒组成、pH等基础理化性质具有显著的相关性。土地利用类型对土壤养分元素含量均具有显著的影响,水浇地土壤由于其高水肥投入而具有较高的养分含量。研究结果对区域土壤养分科学管理和土地资源的可持续利用提供理论依据。Four main land use types including dry land,irrigable land,grassland and forestland in the agriculture-pasture ecotone of north China were taken as research objects.The contents of soil organic matter,nitrogen,phosphorus,potassium,available iron,available manganese,available copper,and available zinc in 0-15 and 15-30 cm soil layers were systematically analyzed.The results showed that:1)Irrigated land showed the highest soil organic matter,total nitrogen,total phosphorus and available potassium compared with grassland,forest land,and dry land,with values of 43.42,2.62,2.86 and 444.00 g·kg^-1,respectively.2)The effect of land use types varied between different trace elements,but the contents of the available iron,available manganese,available copper,and available zinc in the irrigated soil were all higher in all the four land use types,reaching up to 11.45,15.21,0.59 and 2.04 mg·kg^-1,respectively.3)Soil nutrient content had a significant correlation with soil particle composition,pH,and other basic physi-chemical properties.In summary,the influences of land use type on soil nutrients were significant,nutrient contents were higher in irrigable land soil due to high water and fertilizer input.These results will provide a theoretical basis for the scientific management of soil nutrients and sustainable use of land resources.

关 键 词：土地利用类型 土壤养分变化 农牧交错带 

分 类 号：S158[农业科学—土壤学]