农业资源与环境学报Issue(6)：530-536,7.DOI:10.13254/j.jare.2015.0146
华北小麦玉米轮作区耕地地力等级划分及特征
Characteristics and Gradations of Cultivated Land Fertility for Winter Wheat-Summer Maize Rotation System in North China
摘要
Abstract
North China area is playing a significant role in grain production in China. Winter wheat-summer maize rotation is a major cropping system in this region. Based on the database of county cultivated land survey of soil fertility in Ministry of Agriculture of the People’s Republic of China, total 23 862 samples were selected, 17 945 evaluation units were taken from the superposition of soil map, landuse map and administrative map. 11 evaluation indicators, including precipitation, accumulated temperature, top layer thickness, texture, organic matter, available P, available K, available Zn, salinity and irrigation capacity, were used to evaluate the gradation of the cultivated land fertility. The results showed that the fertility grades from first to sixth of the cultivated land for winter wheat-summer maize rotation system in North China accounted for 11.29%, 19.30%, 28.06%, 21.57%, 11.99% and 7.80%, respectively, and the overall cultivated land fertility upgraded in comparison with the second soil survey. The concentrations of soil organic matter, available P, available K were increasing significantly. In conclusion, this study will provide some basic information and scientific insights into specifically practical fertilization and soil improvement, scientific layout of crop production and adjustment of agricultural structure to promote cultivated land production capacity.关键词
华北小麦玉米轮作区/耕地地力/等级划分/地力特征Key words
winter wheat-summer maize rotation system in North China/cultivated land fertility/gradoation/fertility characteristics分类
农业科技引用本文复制引用
薛彦东,辛景树,任意,万广华,张桂兰,杨瑞让..华北小麦玉米轮作区耕地地力等级划分及特征[J].农业资源与环境学报,2015,(6):530-536,7.基金项目
农业部耕地质量保护项目 （）
