现代农业科技Issue(8)：97-101,114,6.DOI:10.3969/j.issn.1007-5739.2024.08.026
张家川县耕地土壤肥力评价及空间分布特征
Soil Fertility Evaluation and Spatial Distribution Characteristics of Cultivated Land in Zhangjiachuan County
摘要
Abstract
Through the determination of soil fertility indicators of cultivated land in three townships(Yanjia Township,Zhangjiachuan Town and Gongmen Town)of Zhangjiachuan County,the quality of soil fertility was evaluated by principal component analysis,and the spatial variability of each soil fertility indicator and comprehensive soil fertility were analyzed by combining GIS analysis.The results showed that,the soil in the study area was alkaline,with strong alkaline soil in the southern area of Gongmen Town;organic matter content was medium,the organic matter content of Yanjia Township was the richest,reaching 16.75 mg/kg;total nitrogen content was rich while available nitrogen content was lacking,and the spatial distribution showed a gradual increase from west to east;the available potassium content and available phosphorus content were rich,and showed the distribution trend of high in east and low in west,low in south and high in north respectively.Principal component analysis results showed that the supply capacity of soil available nutrients in Zhangjiachuan Town and Gongmen Town was strong,but the fertilizer retention capacity was poor;Yanjia Township soil nutrient accumulation capacity was strong.The soil comprehensive fertility quality from high to low was in the order of Yanjia Township,Zhangjiachuan Town,Gongmen Town,showing a spatial distribution trend of high in the east and low in the west.In summary,soil nutrients and comprehensive fertility distribution in the study area is uneven,so it is necessary to coordinate the application ratio of nitrogen,phosphorus and potassium fertilizer,to achieve precise fertilization in stages through"due to the land,due to seedlings,due to water,due to the time".关键词
耕地/土壤肥力/分布特征/空间变异/甘肃张家川Key words
cultivated land/soil fertility/distribution characteristic/spatial variability/Zhangjiachuan Gansu分类
农业科技引用本文复制引用
章梅..张家川县耕地土壤肥力评价及空间分布特征[J].现代农业科技,2024,(8):97-101,114,6.基金项目
中国煤炭地质总局科技项目(ZMKJ-2022-J04-4). （ZMKJ-2022-J04-4）
