章丘大葱特征元素农业地球化学研究

Study on Agricultural Geochemistry of Characteristic Elements of Green Onion Plantation in Zhangqiu Area

以章丘大葱产区生态地球化学调查为基础,采集了表层土壤、大葱、根系土及出露的代表性岩石样品,实测了大量和微量营养元素的含量,查明了研究区土壤地球化学背景。通过计算大葱对土壤营养元素的吸收率及大葱品质与营养元素的相关性分析,查明了大葱生长的特征营养元素为N,K2O,Zn,B,P,Cu,Mn。在岩石-土壤-大葱这一生态体系中,营养元素在土壤中保持一定的储备和积累,为大葱的生长提供了有利的农业地球化学环境。

Based on agricultural geochemistry survey of green onions plantation field in Zhangqiu area, collecting the samples of topsoil, green onions, root soil and representative outcropped rocks, contents of major elements and nutrients have been tested, and geochemical background of soil in studying area has been identified. Through calculation of absorption coefficient and correlation analysis between green onion varieties and nutrients, it is showed that N, K20, Zn, B, P, Cu, Mn are the specific nutrient elements. Through analyzing the migration and mass balance of nutrient elements in rock ＂ soil - green onion ecologic system, it is found that certain reserve and accumulation of nutrient elements in soil will provide beneficial geochemical environment for the growth of green onion.