CAJ | 학술논문

[目的]揭示土壤全量养分空间分布的异质性,为农田的科学管理及提高作物产量提供理论依据.[方法]秋收后、上壤封冻前,在辽宁省59个农业气象站选择典型农业生态类型,分别丁0～20 cm和20～40 cm进行混合取样,并进行相应的GPS定位.分别分析不同深度土壤全量养分,有机碳和全氮:元素分析仪测定(Elementar Ⅲ,德国);全磷:Na2CO3熔融-钼锑钪比色;全钾:NaOH熔融-火焰光度计法.利用SPSS 13.0对土壤全量养分进行止态分布检验,不满足正态分布的进行对数转换,直至满足正态分布为止.利川SPSS13.0软件将Excel中的经度、纬度、海拔和属性数据转换为dbf格式.利用GIS9.2中的Kriging插值绘图,在ArcMap中将土壤属性的插值图与辽宁省行政区域图叠加,得到全量养分的空间分布图.[结果]不同土壤深度全碳、全氮和全磷呈现出东高西低的分布趋势,但全钾在辽西分布较高.土壤表层(0～20 cm)全碳、全氮、全磷和全钾含量均高于下层(20～40 cm),表现为土壤表层富集的现象全钾随土壤深度变化量较小,其表层和下层平均含量分别为17.64和17.08 g/kg.[结论]不同土壤深度全量养分的分布特征为农田管理提供了理论依据.
[목적]게시토양전량양분공간분포적이질성,위농전적과학관리급제고작물산량제공이론의거.[방법]추수후、상양봉동전,재요녕성59개농업기상참선택전형농업생태류형,분별정0～20 cm화20～40 cm진행혼합취양,병진행상응적GPS정위.분별분석불동심도토양전량양분,유궤탄화전담:원소분석의측정(Elementar Ⅲ,덕국);전린:Na2CO3용융-목제항비색;전갑:NaOH용융-화염광도계법.이용SPSS 13.0대토양전량양분진행지태분포검험,불만족정태분포적진행대수전환,직지만족정태분포위지.리천SPSS13.0연건장Excel중적경도、위도、해발화속성수거전환위dbf격식.이용GIS9.2중적Kriging삽치회도,재ArcMap중장토양속성적삽치도여요녕성행정구역도첩가,득도전량양분적공간분포도.[결과]불동토양심도전탄、전담화전린정현출동고서저적분포추세,단전갑재료서분포교고.토양표층(0～20 cm)전탄、전담、전린화전갑함량균고우하층(20～40 cm),표현위토양표층부집적현상전갑수토양심도변화량교소,기표층화하층평균함량분별위17.64화17.08 g/kg.[결론]불동토양심도전량양분적분포특정위농전관리제공료이론의거.
[Objective]The aim was to reveal the spatial distribution characteristics of total nutrients in soil and provide a theoretical basis for farmland management and improvement of crop yield.[Method]GIS technique was used to analyze the spatial distribution characteristics of total C,total N,total P and total K for different soil layers in Liaoning Province.[Result]The results showed that the content of total C,total N,total P decrease from east to west,but the content of total K was high in north district of Liaoning Province.The content of total C,total N,total P and total K was higher in soil surface (0-20 cm) than the lower (20-40 cm).Total K varied less with soil depth,and its mean content was respectively 17.64 g/kg and 17.08 g/kg for soil surface and soil lower layer.[Conclusion]The results of the distribution of soil total nutrients in different soil layers supplied a theory basis for farmland management.