Spatial-temporal Characteristics of Carbon Capture Capacity by Crops in Shaanxi Province During Recent Twenty Years

ZHANG Hongyun; ZHANG Yanfang; WEI Hejie; WANG Shu

doi:10.13961/j.cnki.stbctb.2016.02.013

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Spatial-temporal Characteristics of Carbon Capture Capacity by Crops in Shaanxi Province During Recent Twenty Years

- Spatial-temporal Characteristics of Carbon Capture Capacity by Crops in Shaanxi Province During Recent Twenty Years
- Bulletin of Soiland Water Conservation Vol. 36, Issue 2, Pages: 65-71(2016)
- 作者机构：
  
  1. 陕西师范大学旅游与环境学院,陕西,西安,710119
  2. 北京师范大学资源学院,北京,100875
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.02.013
  CLC：
- Published：2016
- 稿件说明：
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ZHANG Hongyun, ZHANG Yanfang, WEI Hejie, et al. Spatial-temporal Characteristics of Carbon Capture Capacity by Crops in Shaanxi Province During Recent Twenty Years[J]. Bulletin of Soiland Water Conservation, 2016, 36(2): 65-71.
DOI：

ZHANG Hongyun, ZHANG Yanfang, WEI Hejie, et al. Spatial-temporal Characteristics of Carbon Capture Capacity by Crops in Shaanxi Province During Recent Twenty Years[J]. Bulletin of Soiland Water Conservation, 2016, 36(2): 65-71. DOI： 10.13961/j.cnki.stbctb.2016.02.013.

摘要

[目的] 研究近20 a陕西省农作物碳截获的时空特征及其影响因素

为区域生态系统碳循环研究提供参考依据。[方法] 基于陕西省主要作物的产量、播种面积等数据

运用系数法、灰色关联模型等进行估算与分析。[结果](1) 1991-2012年陕西省主要作物的碳截获量呈波动式增加

其中粮食作物的碳截获量大于经济作物

且粮食作物的年际波动比经济作物稳定。(2) 研究区主要作物碳截获量及其变化存在明显的空间差异

4个地理区作物碳截获量的大小依次为:关中地区 > 陕南地区 > 陕北黄土高原区 > 陕北风沙区

且除陕南地区外

其他3大区域的作物碳截获量都呈增加趋势。主要作物碳截获的重心位于西安和咸阳地区

呈由西南向东北方向移动的变化趋势。(3) 在各因素中

作物的有效灌溉面积、旱涝保收面积和播种面积对其碳截获量的影响较大

且各因素与作物碳截获量的关联度存在明显的空间差异。[结论] 陕西省作物生长过程中起到明显的碳汇作用

但其碳截获的增速小于中国大部分地区

提高有效灌溉率和人为投入

有利于增加作物的碳截获量

对缓解区域碳减排的压力具有现实意义。

Abstract

[Objective] This paper studied spatial-temporal characteristics and the influence factors of carbon capture by crops in Shaanxi Province during the recent twenty years in order to provide a reference for the research of regional ecosystem carbon cycling. [Methods] Based on the data of yield and planted acreage of major crops

and other else

coefficient method and gray correlation model were used to estimate and analyze the spatial-temporal characteristics. [Results] (1) The amount of carbon capture by major crops showed a fluctuated trend from 1991 to 2012 in Shaanxi Province. The amount of carbon capture by food crops was bigger than that of carbon capture by economic crops. Annual fluctuation of carbon capture by food crops was also more stable than that of carbon capture by economic crops. (2) There were obvious spatial differences in the amount of carbon capture by main crops and its change in Shaanxi Province. They were summarized as follows: Guanzhong region > South region of Shaanxi Province > the Loess Plateau in North Shaanxi Province > sand drift region in North Shaanxi Province. The amount of carbon capture by crops in three regions increased

except the south region of Shaanxi Province. The gravity center of carbon captured by major crops in Shaanxi Province mainly located in the districts of Xi'an and Xianyang area

showing a change trend from southwest to northeast. (3) Crops' effective irrigation area

harvest guaranteed coverage despite of drought and waterlogging

and planting area were the major factors on carbon capture by crops. The correlations between various factors and carbon capture by major crops were found spatially different. [Conclusion] Crops play an important role in carbon fixation in growing process

but its growth rate of carbon capture by major crops in Shaanxi Province is less than that of carbon capture by major crops in most parts of China. Improving effective irrigation rate and artificial input can help to increase the amount of carbon capture by main crops

and to alleviate the pressure of regional carbon emissions.

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