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标题

基于气候和土壤要素的中国耕地适宜性指数构建

作者

魏希文 崔雪锋

机构

北京师范大学全球变化与地球系统科学研究院;北京师范大学地表过程与资源生态国家重点实验室

摘要

中国历史土地利用的重建工作主要分为数据重建和空间重建,而建立具有空间指示作用的参数对于历史土地利用的空间重建具有举足轻重的指示意义。本文基于此想法,参考前人经验,构建了一套耕地适宜性指数,作为历史土地利用空间重建的基础。首先通过分析影响耕地时空分布的多种自然要素和人文因素,从中厘定土壤和气候这两个关键要素,然后基于此构建了一套计算耕地适宜性指数的方法。通过获取的气候适宜性与土壤适宜性的空间分布图与实际土地利用的相关性分析验证了这两个要素的一定代表性。本文最终的结果代表自然状态下耕地分布的最初可能性,具体特征有:①对耕地分布起影响的气候适宜性分为四个等级的块状分布;②对耕地分布有影响的土壤适宜性比较零散,但是大体还是以秦岭-淮河一线为分界线,呈现北高南低的分布;③对于不同地区耕地分布,影响的主导因素有区别,西北为土壤要素,东南为气候要素;④耕地适宜性最高的地区基本集中在华北平原、长江中下游平原区域,而青藏高原地区的适宜性最低。结合人口、经济等因素,这样一套耕地适宜性分布图对历史土地利用空间分布有重要的空间指示作用。

关键词

中国;历史耕地;重建;气候;土壤;适宜性指数

引用

魏希文, 崔雪锋. 基于气候和土壤要素的中国耕地适宜性指数构建[J]. 北京师范大学学报(自然科学版),2016,52(1):63-69.

基金

国家重点基础研究发展计划基金资助项目(2013CB956001)

分类号

N53

DOI

10.16360/j.cnki.jbnuns.2016.01.014

Title

Construction of cultivated land suitability index for China based on climate and soil properties

Author

WEI Xiwen, CUI Xuefeng

Affiliations

College of Globe Change and Earth System Science,Beijing Normal University;State Key Laboratory of Earth Surface Processes and Resources Ecology, Beijing Normal University

Abstract

Reconstruction of historical land use includes volume reconstruction and spatial pattern reconstruction. A Cultivated Land Suitability Index (CLSI) was established in the present work to serve as distribution proxies for spatial reconstruction. Key factors of climate and soil were first identified from series of physical and anthropogenic factors. Cultivated land suitability map for climate and soil were then developed based on these two key factors. Suitability maps were validated; CLSI was then produced. CLSI reflects naturally cultivated land without human intervention. It was found that climate suitability map of China can be divided into 4 major parts with the largest area located in traditionally agriculture area. Soil suitability map of China is more scattered with many patches with slightly more in the north than the south along the Qinling Mountains-Huaihe River Line. There is a clear division that the northwest is more controlled by soil and the southeast is more controlled by climate. Cultivated Land Suitability Index shows that the most suitable area mainly focuses on The North China Plain and The Yangtze Plain. The Tibetan Plateau is barely suitable for cultivation. With information of population and economy, CLSI index could be really helpful for historical land use spatial reconstruction.

Key words

China; Historical; cultivated land; Reconstruction; Climate; soil; Suitability lndex

cite

WEI Xiwen, CUI Xuefeng. Construction of cultivated land suitability index for China based on climate and soil properties[J]. Journal of Beijing Normal University(Natural Science)),2016,52(1):63-69.

DOI

10.16360/j.cnki.jbnuns.2016.01.014

Copyright © 2014 Journal of Beijing Normal University (Natural Science)
Designed by Mr. Sun Chumin. Email: cmsun@mail.bnu.edu.cn