浙北平原区富硒土壤基本特征和成因分析.pdfVIP

浙北平原区富硒土壤基本特征与成因分析 宋明义，蔡子华，黄春雷，胡艳华，王加恩 (浙江省地质调查院，浙江杭州 311203) 摘要：通过对浙北杭嘉湖平原区富硒土壤研究，发现区内富硒土壤环太湖周围不连续地分布，土壤硒全量主要在 0.3-0.5mg/kg，平均值为0.389mg/kg，标准离差和变异系数分别为0.037 和 9.4% 。土壤硒与土壤有机质关系密切 （n=779 ，r=0.550 ），而与土壤pH 不相关；土壤在有机质丰富和氧化条件下，农产品富硒效果好。在对富硒土壤 成因进行深入研究的基础上，提出湖沼相富硒土壤新类型。 关键词：湖沼相；土壤母质；富硒土壤；基本特征；成因分析；浙北平原 The Basic Characteristics and Genetic Analysis of Selenium-rich Soil in the Plain of Northern Zhejiang SONG Mingyi, CAI Zihua, HUANG Chunlei, HU Yanhua, WANG Jia’en (Zhejiang Institute of Geological Survey, Hangzhou 311203, China) Abstract: Based on the study of selenium-rich soil in Hangjiahu Plain, we found that the selenium-rich soil distributed around the Tai Lake. The amount of soil selenium was from 0.3 mg/kg to 0.5 mg/kg, and its average, standard deviation and coefficient of variation were respectively 0.389 mg/kg, 0.037and 9.4%. Correlation analysis indicated that selenium was closely related to soil organic matter, (n = 779, r = 0.550), but it was not related to soil pH. The result of further study showed that the possibility of the agricultural products selenium-rich was high in the soil condition of rich in organic matter and reducing environment. Finally, based on the results of the study, limnetic facies type of selenium-rich soil was first put forward. Keywords: Limnetic facies, Parent materials, Selenium-rich soil, Basic characteristics, Genetic analysis, the plain of Northern Zhejiang 1 概述 浙北平原区地处长江三角洲南岸，北临太湖，东接上海。这里土壤肥沃，经济发达，是我国著名的鱼 米之乡。由于该区为河湖相、湖沼相和滨海相沉积平原，土壤中硒含量一般较低，长期以来，一直被大多 [1-3] 数研究者认为是缺硒地区 。 硒是自然界中的一种稀散元素，能抑制化学致癌物，预防镉中毒，对汞和砷等重金属的毒性有明显拮 抗作用。人体