湘西州土壤肥力综合评价及空间分布特征  

Comprehensive Evaluation and Spatial Distribution Characteristics of Soil Fertility in Xiangxi Prefecture

作　　者：彭欢 周迎 曾汉勇 罗金 李强 贺建武[3,4] PENG Huan;ZHOU Ying;ZENG Hanyong;LUO Jin;LI Qiang;HE Jianwu(Agricultural Product Quality Inspection and Testing Center,Xiangxi Tujia and Miao Autonomous Prefecture,Jishou 416000,Hunan China;Forestry Bureau,Xiangxi Tujia and Miao Autonomous Prefecture,Jishou 416000,Hunan China;National&Local United Engineering Laboratory of Integrative Utilization Technology of Eucommia Ulmoides,Jishou 416000,Hunan China;College of Biology and Environmental Sciences,Jishou University,Jishou 416000,Hunan China)

机构地区：[1]湘西土家族苗族自治州农产品质量检验检测中心,湖南吉首416000 [2]湘西土家族苗族自治州林业局,湖南吉首416000 [3]吉首大学杜仲综合利用技术国家地方联合工程实验室,湖南吉首416000 [4]吉首大学生物资源与环境科学学院,湖南吉首416000

出　　处：《吉首大学学报（自然科学版）》2022年第6期38-44,共7页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(42001200)。

摘　　要：为提升湘西州土壤肥力,建设高质量农田,以土壤pH值、有机质、全氮、有效磷、速效钾为评价指标,结合指数和法构建土壤肥力综合评价体系,对湘西州土壤肥力进行综合评价.结果表明,湘西州土壤存在轻微酸化现象,有机质含量偏高,全氮含量适中,有效磷和速效钾含量极差较大,平均含量偏高;湘西州Ⅰ,Ⅱ,Ⅲ,Ⅳ级肥力土壤面积占比分别为17.66%,17.62%,8.21%,56.51%.The comprehensive evaluation of soil fertility in Xiangxi autonomous Prefecture provides a basis for improving soil fertility and building high-quality farmland.Soil pH,organic matter,total nitrogen,available phosphorus,and available potassium were selected as evaluation indicators,combined with the index summation method,a comprehensive evaluation system of soil fertility is constructed,and the soil fertility is comprehensively evaluated.The results showed that the soil pH in Xiangxi Prefecture is acid,there is slight soil acidification,the content of organic matter is high,the content of total nitrogen is moderate,the content of available phosphorus and available potassium vary greatly,and the average content was high.The proportion of soil area with gradeⅠ,Ⅱ,ⅢandⅣfertility in Xiangxi Prefecture was 17.66%,17.62%,8.21%and 56.51%respectively.

关 键 词：土壤肥力分级 肥力综合评价 空间分布特征 

分 类 号：S158[农业科学—土壤学]