干旱地区农业研究2009，Vol.27Issue(6)：23-26,32,5.
关中农田土壤有机质和碳酸钙空间变异特征及其机理分析
Spatial variability of soil organic matter and calcium carbonate and its reason in Guanzhong farmland
摘要
Abstract
In order to study the effect and influence of human activities on spatial variability of soil organic matter and calcium carbonate in farmland, an experiment was made in the farmland of Duzhai Village, Yangling, Shaanxi, and meanwhile, the variation mechanism was analyzed. The results showed that the average soil organic matter contents in top soil and substratum soil were 20.64 g/kg and 10.81 g/kg, while the coefficients of variation were 0.087 and 0.013 respectively, belonging to a low level; the average soil organic matter content in subsurface was 16.96 g/kg belonging to a moderate level; a low level of variation coefficient of calcium carbonate appeared in all the soil layers. Through analyzing the contour map of soil spatial variability, the same changing law was found in soil organic matter and calcium carbonate content in the horizon direction, which showed that higher soil organic matter and calcium carbonate content appeared in the points closer to the village, forming a concentric circle.关键词
有机质/碳酸钙/空间变异/人为活动Key words
organic matter/calcium carbonate/spatial variability/human activities分类
农业科技引用本文复制引用
王金贵,王益权,徐海,冯小龙,王永健,伏耀龙,张育林..关中农田土壤有机质和碳酸钙空间变异特征及其机理分析[J].干旱地区农业研究,2009,27(6):23-26,32,5.基金项目
陕西省农业科技推广项目"关中灌区小麦玉米高产技术"(14220210) （14220210）
