Spatial-temporal Difference Analysis of Cultivated Land Use Intensity Based on Emergy in Poyang Lake Eco-economic Zone
Spatial-temporal Difference Analysis of Cultivated Land Use Intensity Based on Emergy in Poyang Lake Eco-economic Zone
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发表时间：
2012
影响因子：
4.8
通讯作者：
Xie Hualin;Zou Jinlang;Peng Xiaolin
中科院分区：
文献类型：
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作者：
Xie Hualin;Zou Jinlang;Peng Xiaolin
以鄱阳湖生态经济区为研究对象，介绍了一种利用农业投入指标及其能值项测算耕地利用强度的方法。对研究区2000 - 2009年劳动强度、农机强度、化肥强度、农药强度和农膜强度的时间序列特征进行了分析。然后，以5个能值指标为共同基础，从整体上分析了耕地利用强度的时空变化。结果如下。1)10年间，鄱阳湖生态经济区耕地利用强度呈指数增长，农业机械强度占总投入的比重最大，超过99.50%，且逐年增加，表明农业机械化是鄱阳湖生态经济区农业发展的总趋势。2)耕地高度集约利用和耕地低度集约利用的县数最多，耕地高度粗放利用的县数最少。3)该区域可划分为5个耕地利用类型区：东部深度利用区、中东部低度集约利用区、中部高度集约利用区、南部中度集约利用区和北方中度集约利用区。4)耕地利用强度水平与经济发展相协调的县域逐年增加，社会经济发展对耕地利用强度的影响越来越明显。最后，提出了鄱阳湖生态经济区耕地集约利用发展规划的建议，特别是对不同集约利用水平的县提出了建议。
This paper introduces a measurement method for cultivated land use intensity by using indexes of farming input with its emergy terms, which is applied by taking Poyang Lake Eco-economic Zone as a research object. This paper conducts an analysis of the time series feature of labor intensity, agricultural machinery intensity, fertilizer intensity, pesticide intensity and agricultural film intensity in the study area from 2000 to 2009. Then, taking the five emergy indexes as a common basis, temporal and spatial changes of cultivated land use intensity as a whole are analyzed. Results are drawn as follows. 1) In the 10-year period, cultivated land use intensity increases exponentially in the Poyang Lake Eco-economic Zone; the agricultural machinery intensity has the largest proportion of the total inputs, exceeding 99.50%, and increases year by year, which indicates that the agricultural mechanization is the general trend of agricultural development in the zone. 2) The total number of counties belonging to highly and less intensive use of cultivated land is the largest, while that belonging to further and extensive use of cultivated land is the smallest. 3) This zone can be divided into five areas of cultivated land: eastern area with further use, central-eastern area with less intensive use, central area with highly intensive use, southern area of moderate intensive use, and northern area of moderate intensive use. 4) The counties with cultivated land use Intensity level coordinating its economic development increase year by year and the socio-economic development has more and more obviously effects on the cultivated land use intensity. Finally, the paper puts forward some suggestions on development plan of intensive cultivated land use in the Poyang Lake Eco-economic Zone, especially in the counties at different levels of intensive land use.