朱丽芬，骆检兰，黄逢秋，徐雪生

摘 要 本文以湖南省江永县香柚大宗产区为研究对象，采用1∶2.5万土地质量地球化学评价方法对香柚果实中理化性状指标与根系土中相关指标进行相关性分析。研究结果表明：香柚土壤综合质量一等及二等的面积占比为77.38%，产区内果实样本富硒比例达100%，果品皆为一等优质。县域香柚优质适生区地块总面积为27.51 km2，占全县耕地及园地面积比例为7.32%，确定了香柚优质适生区的集中分布区域。

关键词 江永县;香柚;土地质量地球化学评价;适生地质环境

中图分类号：P596 文献标志码：A

Geochemical Characteristics and Suitable Geological Environment of Fragrant Pomelo Production Area in Jiangyong County， Hunan Province

Zhu Lifen， Luo Jianlan， Huang Fengqiu， Xu Xuesheng

（Hunan Institute of Geophysical and Geochemical Exploration，Changsha Hunan 410116）

Abstract： The bulk production area of fragrant pomelo in Jiangyong County， Hunan Province was taken as study project in this article.  Land quality geochemical evaluation of 1∶25 000 was used to analyze the correlation between the physical and chemical properties of the pomelo fruit and the related indexes in the root soil. The results show that the comprehensive soil quality of the fragrant pomelo is the first-class and second-class soil areas， accounting for 77.38% of the total area. The selenium-enriched ratio of fruit samples in the production area reaches 100%， and the fruits are of first-class quality. The total area of the high-quality suitable area for fragrant pomelo in the county is 27.51 km2， which accounts for 7.32% of the county's cultivated land and garden area. At the same time， the concentrated distribution area of the high-quality suitable fragrant pomelo is determined.

Keywords： Jiangyong County; fragrant pomelo; land quality; geochemical evaluation; geological environment suitable for growth

江永縣位于湖南省南端，毗邻广东，与广西接壤，自然资源得天独厚，适宜农作物生长，特色农业资源丰富[1]。江永县名特优农产品众多，“香柚、香芋、香姜、香米、香菇”等“江永五香”远近闻名，多次获各级农博会金奖，且皆为国家地理标志产品[2]。近年来，江永县立足特色农业资源优势，把优质水果、优质蔬菜、优质稻等特色区域产业作为最具优势和潜力的主导产业来发展。本文在前人工作基础上，以江永香柚为研究对象，从香柚名优特农产品产区的地层、岩性、土壤类型、土壤pH、土壤肥力、土壤环境质量、地球化学特征元素等7个方面特征着手，对香柚产区的农业地质背景及地球化学特征进行综合研究，综合分析江永香柚名优特农产品的适宜性和限制性条件，揭示其品质优劣与特殊农业地质条件的关系，在此基础上，建立香柚的适生地质环境模式，提出适生区划建议，为科学指导名优特农产品推广种植、因地制宜发展名优特农产品提供科学依据。……