CAJ | 학술논문

以天津市武清区为例,通过选取土壤pH值、有机质、全氮、速效磷、速效钾为土壤肥力指标,运用综合指数法对土壤肥力状况进行评价;并将地统计学与GIS相结合,进一步分析土壤各肥力因子及总体肥力质量的空间变异规律.结果表明：所选的5种肥力指标中,pH值具有弱空间相关性,有机质、全氮、速效磷、速效钾均表现中等强度的空间相关性;运用Kriging空间插值发现pH值较高的部分处于研究区中部,而较低的部分处于北部,有机质含量由北向南逐渐增大,全氮、速效钾均呈同心圆模式由内向外逐渐降低,其核心点为黄庄街道,速效磷含量由北向南逐渐降低;整个武清区土壤肥力质量呈现北高南低的趋势,以中等质量土壤为主.该评价结果能有效为规范农户种植、施肥行为和制定相关农业规划提供科学依据.
이천진시무청구위례,통과선취토양pH치、유궤질、전담、속효린、속효갑위토양비력지표,운용종합지수법대토양비력상황진행평개;병장지통계학여GIS상결합,진일보분석토양각비력인자급총체비력질량적공간변이규률.결과표명：소선적5충비력지표중,pH치구유약공간상관성,유궤질、전담、속효린、속효갑균표현중등강도적공간상관성;운용Kriging공간삽치발현pH치교고적부분처우연구구중부,이교저적부분처우북부,유궤질함량유북향남축점증대,전담、속효갑균정동심원모식유내향외축점강저,기핵심점위황장가도,속효린함량유북향남축점강저;정개무청구토양비력질량정현북고남저적추세,이중등질량토양위주.해평개결과능유효위규범농호충식、시비행위화제정상관농업규화제공과학의거.
Wish the research object of Wuqing District of Tianjin and the indicators of pH value, organic matter, total N, available P and available K, the soil fertility was evaluated by comprehensive index method. Geostatistics combined with GIS was used to analyze the spatial variation characteristics of soil fertility factors and the general quality. The results indi- cated that pH value demonstrated weak spatial dependence and others demonstrated moderate spatial correlation. Through kriging interpolation, it was found that the highest ofpH value was in the middle of the study area and the lowest was in the north. Soil organic matter increased from north to south, but available P varied in the contrary way. Both total N and available K decreased from the inside to the outside in the concentric circle mode and the core was in Huangzhuang Street. The fertility quality of Wuqing District was higher in the north and lower in the south, which was at a middle level of fertility. The con- clusions could effectively provide scientific reference for regulating household behavior of planting and fertilization and making agricultural policies.