Cropland Protecting Pressure in Zhengning County of Gansu Province Affected by the" Grain for Green" Project

SHEN Jian-xiu; WANG Xiu-hong; ZHANG Wei

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Cropland Protecting Pressure in Zhengning County of Gansu Province Affected by the" Grain for Green" Project

- Cropland Protecting Pressure in Zhengning County of Gansu Province Affected by the" Grain for Green" Project
- Bulletin of Soiland Water Conservation Vol. 31, Issue 5, Pages: 23-27(2012)
- 作者机构：
  
  1. 中国科学院地理科学与资源研究所,北京,100101
  2. 中国科学院大学,北京,100049
  3. 浙江省城市湿地与区域变化研究重点实验室,浙江,杭州,311121
- 作者简介：
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- DOI：
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- Published：2012
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SHEN Jian-xiu, WANG Xiu-hong, ZHANG Wei. Cropland Protecting Pressure in Zhengning County of Gansu Province Affected by the" Grain for Green" Project[J]. Bulletin of Soiland Water Conservation, 2012, 31(5): 23-27.
DOI：

SHEN Jian-xiu, WANG Xiu-hong, ZHANG Wei. Cropland Protecting Pressure in Zhengning County of Gansu Province Affected by the" Grain for Green" Project[J]. Bulletin of Soiland Water Conservation, 2012, 31(5): 23-27. DOI：

摘要

以甘肃省正宁县1995

2000和2010年1∶10万的土地利用图和1995-2008年有关耕地利用的统计数据作为分析依据

以ENVI

ArcGIS和SPSS软件为主要工作平台

对案例区生态退耕前后的耕地分布格局变化及耕地保护压力进行了分析。生态退耕实施后

大部分坡耕地转为林地

建设用地占用平原耕地明显。耕地空间分布表现为由分散向集中

由不规则向规则方向转化。因子分析显示

耕地保护压力主要涉及3方面因素:人们生活和生产水平主导的人文因素

退耕补贴水平体现的政策因素以及成灾面积体现的自然因素。为了缓解生态退耕区的耕地保护压力

需要控制建设用地占用平原耕地

稳定生态补偿水平以避免已退耕地的复垦。同时需注意控制农资投入水平

防止农业面源污染加剧的风险。

Abstract

Based on the land use maps in 1995

2000 and 2010

as well as the statistical data of cropland use in Zhengning County of Gansu Province

cropland distribution change and cropland protecting pressure were studied before and after the "grain for green" project by using ENVI

ArcGIS and SPSS.After the "grain for green" project

most of low-quality slope croplands were returned to forestland

and some of high-quality plain croplands were occupied by expanding construction land.The spatial pattern of croplands changed from scattered and irregular to concentrated and regular distribution.Factors for cropland protecting pressure in Zhengning County can be divided into artificial

policy and natural factor.The artificial factor is mainly de-termined by people's living standards and crop production conditions

the policy factor is affected by restora-tion subsidy

and the natural factor is reflected by damage area of cropland.In order to relieve cropland pro-tecting pressure in the area where the "grain for green" project was implemented

more emphasis should be placed on protecting the existing plain cropland from being occupied by construction land

stabilizing a con-siderable ecological compensation level for avoiding reclamation of the returned cropland

and limiting agro-chemical inputs in order to reduce the risk of agricultural non-point source pollution?

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