关键词:  , 生态地球化学, 优质沙糖桔产地, 土壤-沙糖桔生态系统, 营养、有益元素, 有害元素 

Abstract:

This study carried out an ecogeochemistry investigation on Shatang citrus plantation field in Weizheng and Didou of Sihui, Guangdong Province. Soils, leaves and fruits of citruses were sampled from Shatang citrus plantation field, and the contents of their nutritional, beneficial and harmful elements were measured. The measurements revealed the following results: (1)in the high quality Shatang citrus producing area in Sihui, the content of beneficial and nutritional elements is suitable, and the content of harmful elements, such as Cd, Cr and Hg is in accord with the environmental demand of the unpollutedfruit producing area; (2)in the ecological system of soil Shatang citrus, the variation regularity of total and effective contents of beneficial and nutritional elements is similar to each other from the depth to the surface; (3)in different organs of Shatang citrus , i.e. leaves, pericarps and fleshes, elements are enriched mostly in leaves, and harmful elements are enriched a little in fleshes, and the content of beneficial and nutritional elements in leaves are higher than that in fleshes; (4)the crimson soil with the parent materials from granites or sandstones(especially sandstones), is relatively suitable for planting Shatang citrus.

Key words: eco-geochemistry, highquality Shatang citrus producing area；ecological system of soilShatang citrus, beneficial and nutritional element, harmful element