湖北省优质柑桔林地质-地球化学背景

Geological and Geochemical Background of Good Quality Oranges in Hubei Province

以岩石—土壤（水体）—柑桔为系统,地质学、地球化学与农学相结合,研究鄂西地区的柑桔种植,建立起种植柑桔的5个岩土体系,通过岩土体系的地球化学特征、柑桔叶片营养状况、柑桔果实品质及其相互关系的系统研究,排列出种植柑桔的岩土体系的优劣排序:Ⅲ>Ⅱ>Ⅰ>Ⅳ>V;指出研究区岩土体系普遍缺乏K、Zn、B3种元素;与果实品质好坏关系最密切的微量元素是Ca、B、Mg、Mn、Zn5个元素;叶片营养状况诊断对果实品质有指示意义,提出鄂西地区今后柑桔种植发展的方向及增产培优措施的农业地球化学依据。

This paper researches geological - geochemical background of the good quality orange. In orange plant study the rock-soil(water)-orange should be taken as a system, combines geolo-gy,geochemistry with agronomy. Rock-sou system of orange plant can be divided into five types in Hubei Province, and arrange fine-bad sequence in Ⅲ>Ⅱ>Ⅰ>Ⅳ>Ⅴ, based on geochemical characteristics of rock - soil systems, nourishmeht of orange leaves, fruit quality and their relationship. It also indicates that rock-soil systems of research area are universal poor in K, Zn, B, and a close relationship exists between fruit quality and Ca, B, Mg, Mn, Zn and diagnosis of leaves nourishment has indication for fruit quality. The research shows agrogeochemical basis of future develop, measure of increase production and culture of'orange plant in Hubei Province.