自然资源学报 ›› 2002, Vol. 17 ›› Issue (4): 430-437.doi: 10.11849/zrzyxb.2002.04.006

• 论文 • 上一篇    下一篇

黄土丘陵“梯田退耕”生态重建及地域分异特征

徐勇1, 田均良2, 沈洪泉1   

  1. 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、水利部、西北农林科技大学水土保持研究所,陕西杨凌712100
  • 收稿日期:2001-11-22 修回日期:2002-03-20 出版日期:2002-08-25 发布日期:2002-08-25
  • 作者简介:徐勇(1964~),男,陕西榆林人,副研究员,主要从事农业与乡村发展、区域持续发展模拟等领 域的科研工作。E-mail:yong,xu@sina.com
  • 基金资助:

    中国科学院知识创新项目(KZCX1-10-07-04);中国科学院地理科学与资源研究所创新工程主干项目(CX10G-E01-05-03)。

Eco-environmental rehabilitation and spatial differentiation based on enlarging terrace and de-farming in the loess hilly-gully region

XU Yong1, TIAN Jun-liang2, SHEN Hong-quan1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;
    2. Institute of Soil and Water Conservation,CAS,Yangling712100,China
  • Received:2001-11-22 Revised:2002-03-20 Online:2002-08-25 Published:2002-08-25

摘要: 基于黄土丘陵区过去10年科技攻关成果及延安燕沟流域示范成功经验,在总结“梯田退耕”生态重建模式特点的基础上,根据土地利用、坡耕地和1999年农业人口数据计算了各县(市、区)需新修梯田、园地扩建、林草植被恢复的面积及投资需求额度。通过构建并采用基本农田扩建指数、园地扩建指数、林草植被恢复指数以及投资需求密度等指标对55个县(市、区)进行了类型划分和地域分异特征分析。结果表明:黄土丘陵区需新修梯田面积69.16×104hm2,新扩建经济林果园地面积79.2×104hm2,林草植被恢复面积541.02×104hm2,投资需求总额度158.2×108元;生态重建在地域分布上明显存在两个重点区,一个位于陕北和晋西北交界地区,另一个位于陇东和宁南地区;宜及早制定区域性分类指导政策,并应将有限的资金集中在重点区。

关键词: 生态重建, 梯田退耕, 地域分异, 黄土丘陵区

Abstract: Based on research achievements in the past ten years and the successful experience of Yangou watershed demonstruction project in the loess hilly-gully region,as well as the characteristics of eco-environment al rehabilitation pattern of"enlarging terrace and de-farming",the areas of proposed reterraced fields,expanded graden plots and revegetated grass and forest as well as the amount of required investment on county(city,prefecture)level were calculated.With the aid of basic farmland enlargement index,garden plot expansion index,revegetated grass and forest index as well as investment demand density in dex,55counties of the loess hilly-gully region were classified into different categories,and their spatial differentiation characteristics were respectively analyzed.The following results are drawn as:(1)The area of newly built terraced fields needs to be is69.16×10 4 ha,expanded garden plots,79.2×10 4 ha,rehabilitated vegetation cover,541.02×10 4 ha,and total investment required,15.82billion yuan(RMB).Of which the enlarged terraces,expanded garden plots and rehabilitat-ed vegetation will need6.743,3.315and5.762billion yuan respectively.(2)There are two key eco-environmental rehabilitated areas in the loess hilly-gully region.The one is located in the contiguous areas between the northern Shaanxi province and the north-western Shanxi province,and the other is situated at the eastern Gansu province and the south-ern Ningxia autonomous region.(3)Regional policies adapted to different categories should be worked out as soon as possi-ble and the limited fund should be centralized in the two key areas of the loess hilly-gully re-gion.

Key words: eco-environmental rehabilitation, enlarging terrace and de-farming, spatial differen-tiation, loess hilly-gully region