地球信息科学学报 ›› 2018, Vol. 20 ›› Issue (9): 1274-1285.doi: 10.12082/dqxxkx.2018.180212
收稿日期:
2018-04-27
修回日期:
2018-06-25
出版日期:
2018-09-25
发布日期:
2018-09-25
通讯作者:
刘玉洁
E-mail:dailiangucas@163.com;liuyujie@igsnrr.ac.cn
作者简介:
作者简介:代粮(1993-),男,硕士生,研究方向为气候变化与粮食安全。E-mail:
基金资助:
DAI Liang1,2(), LIU Yujie1,2,*(
), PAN Tao1
Received:
2018-04-27
Revised:
2018-06-25
Online:
2018-09-25
Published:
2018-09-25
Contact:
LIU Yujie
E-mail:dailiangucas@163.com;liuyujie@igsnrr.ac.cn
Supported by:
摘要:
水资源分布不均制约了地区农业生产。从虚拟水角度研究作物需水的时空变化特征及影响因素对提高水资源的合理配置与利用效率,缓解地区水资源短缺问题具有重要参考意义。本文基于Penman-Monteith模型和GIS地统计分析工具,从虚拟水视角分析1986-2012年东北大豆生长季内的需水量变化和虚拟水时空分异特征及其影响因素。结果表明:①1986-2012年,东北地区大豆生长季增温明显,平均风速下降显著,相对湿度整体下降,日照时数有增有减,气候暖干化趋势加剧。②东北大豆生长季内需水量西南多东北少,南部地区需水量减少而北部增加。平均风速的显著下降导致大豆需水量减少,其余气象因子变化均导致需水量增加,温度变化对需水量影响最大,相对贡献率为36.9%,其次为相对湿度、日照时数和平均风速。③大豆虚拟水的空间分布整体为西多东少,虚拟水变化以下降为主(80.6%站点)。虚拟水高值区集中于东北地区西部,向东虚拟水含量降低。气候变化导致了大豆需水量的增加,进而使虚拟水上升,大豆生产变化尤其是单产增长则使得虚拟水下降,气候变化对大豆虚拟水的影响抵消了部分大豆生产变化导致的虚拟水下降。因此,针对大豆虚拟水的时空分异特征,适当调整东北地区大豆的生产布局、选取如耐高温耐旱等大豆品种以及调整灌溉、施肥等田间管理措施等是气候变化背景下提高大豆水资源利用效率的有效适应措施。
代粮, 刘玉洁, 潘韬. 中国东北三省大豆虚拟水时空分异及其影响因素研究[J]. 地球信息科学学报, 2018, 20(9): 1274-1285.DOI:10.12082/dqxxkx.2018.180212
DAI Liang,LIU Yujie,PAN Tao. Spatial-temporal Distribution of Soybean Virtual Water and Its Influencing Factors in Northeast China during 1986-2012[J]. Journal of Geo-information Science, 2018, 20(9): 1274-1285.DOI:10.12082/dqxxkx.2018.180212
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