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机构地区:[1]三峡大学法学与公共管理学院,湖北宜昌443002 [2]三峡大学应急管理研究中心,湖北宜昌443002 [3]三峡大学 [4]三峡大学科学技术处,湖北宜昌443002
出 处:《湖北农业科学》2014年第20期4826-4831,共6页Hubei Agricultural Sciences
基 金:湖北省人文社会科学研究项目(13q034);三峡大学人才科研启动金(KJ2012B056)
摘 要:为了分析湖北省耕地中主要水田和旱地的空间特征和分布成因,采用半变异函数和克吕格插值的方法分析水田旱地的空间分布特点,采用多元对数线性回归方法分析影响因素。结果表明,省内各县级行政单位的水田旱地具有明显的东西方向梯度分布特征;水田旱地结构指数由大到小的顺序为鄂东北低山丘陵区、鄂东南低山丘陵区、江汉平原区、鄂西高山区;多元对数线性回归模型显示,温度年较差、年均温、平均年降水、地形起伏度和人口密度是水田旱地梯度空间分布的主要因素,其中温度年较差、年均温、平均年降水和人口密度发挥正向作用,地形起伏度发挥负向作用。To study the spatial characteristics and factors influencing paddy field and dryland structure in Hubei province,semi-variable function and spatial interpolation was used to analyze the distribution characteristics of paddy field and dryland according to the data of each county in Hubei province.Multiple logarithm linear regression model was used to quantitatively estimate the key factors affecting the spatial distribution of paddy field and dryland.The results showed that the paddy field and dryland of each county in Hubei province had obvious gradient distribution characteristics from east to west direction.The index for paddy field and dryland structure decreased from low hill area in the northeast,low hill area in the southeast,Jianghan plain to high mountain area in the west of Hubei province.The multiple logarithm linear regression showed that annual range of temperature (ART),mean annual temperature (MAT),annual precipitation (AP),terrain undulation (TU) and population density (PD) were the main factors affecting the spatial distribution of paddy field and dryland.The index for paddy field and dryland structure increased with annual range of temperature (ART),mean annual temperature (MAT),annual precipitation (AP)and population density (PD),and decreased with terrain undulation (TU).
关 键 词:水田旱地 半变异函数 克吕格插值 多元对数线性回归 空间特征 梯度分布
分 类 号:S17[农业科学—农业基础科学]
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