定西土壤磷富集空间差异及其影响因素  

Spatial Variation of Soil Phosphorus Accumulation and the Driving Factors in Cultivated Lands in Dingxi

作　　者：黄怡 赵聪 达瓦拉姆 蒋攀 刘雷[1] 胡进耀 HUANG Yi;ZHAO Cong;DA WA La Mu;JIANG Pan;LIU Lei;HU Jingyao(School of Innovation,Mianyang Teachers'College,Mianyang,Sichuan 621000;School of Chemical Engineering,Northwest Minzu University,Lanzhou,Gansu 730000;Forestry and Grassland Bureau of Derong,Ganzi,Sichuan 627950)

机构地区：[1]绵阳师范学院创新学院,四川绵阳621006 [2]西北民族大学化工学院,甘肃兰州730000 [3]得荣县林业和草原局,四川甘孜627950

出　　处：《绵阳师范学院学报》2019年第11期97-103,共7页Journal of Mianyang Teachers＇ College

基　　金：2017年四川省大学生创新创业训练计划项目(201710639043)

摘　　要：磷素是农作物生长必需的成分之一,然而我国农业磷肥利用率仅为30%左右,大量土壤磷素盈余流失,对农业经济发展和环境保护都有不利影响.为此,本次研究以定西半干旱气象与生态环境试验基地温室土壤为研究对象,进行了土壤磷素测定试验,采用spss软件分析了总磷和有效磷在土壤A、B、C层的分布特征和主要影响因子.结果表明,定西实验基地土壤磷素随着土壤深度的加深而升高,呈现明显的上升趋势;同一层土壤磷素差异不显著;不同海拔同层土壤磷素呈现稳定性;研究区耕地土壤磷素富集及其空间差异主要受年均磷肥施用量、降雨、年均气温和土壤黏粒含量显著影响.Phosphorus is one of the essential nutrients for crop growth.However,the utilization rate of agricultural phosphorus fertilizer in China is only about 30%.A large amount of soil phosphorus surplus is lost,which has adverse effects on agricultural economic development and environmental protection.Therefore,the greenhouse soil from semi-arid meteorological and eco-environmental experimental base in DingXi was used as the research object in this study,soil phosphorus test were carried out,The distribution characteristics of total phosphorus and available phosphorus in soil layers A,B and C were analyzed by SPSS software,and the main influencing factors of soil phosphorus enrichment or deficiency were analyzed.The results showed that the content of soil phosphorus in Dingxi experimental base increased with the deepening of soil depth,and showed an obvious rising trend.the same layer of soil phosphorus showed no significant difference,and the same layer of soil phosphorus showed stability at the different elevation.The soil phosphorus enrichment and spatial variation of cultivated land in the research area were mainly affected by the annual amount of phosphate fertilizer,rainfall,average annual temperature and soil clay content.

关 键 词：耕层土壤 有效磷 总磷 空间分布 

分 类 号：S153.6[农业科学—土壤学]