影响从化荔枝生长及果实品质的地球化学特征

从化地区是广东重要的荔枝产区,本文重点对从化荔枝进行了生态地球化学调查,采集了荔枝园表层土壤和荔枝果实以及配套根系土样品,测试了营养、有益和有害元素及荔枝果实的品质。通过计算荔枝果实元素的吸收系数、果实品质与根系土营养元素的相关性,获知影响荔枝生长及果实品质的特征元素,包括常量组分N、P、MgO、NaO、CaO、Al2O3和微量元素B、S、Sb、V。最后通过分析特征元素在评价区分布状况,获知种植荔枝最理想区域为第四纪松散堆积物以及白垩纪花岗岩。

Geochemical Characteristics for Growth and Fruit Quality of Conghua Litchi, Guangdong Province

The paper carried out an eco-geochemistry investigation in litchi plantation field of Conghua, Guangdong province. In the Conghua high-quality litchi producing area, we gathered surface soil and fruit of litchi, analysis for beneficial and nutritional elements. According calculated absorption coefficients, correla- tions between nutritional quality of litchi and elements of soil-in-root, we found the characteristic elements for affecting growth and fruit quality of litchi, including eleven elements such as N, P, MgO, Na20, CaO, A1203, B, S, Sb and V. At last, analysis for distribution of characteristic elements in evaluated area, the qua- ternary and Cretaceous granite are relatively suitable for growing Litchi.