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黄淮海平原雨养条件下冬小麦水分胁迫分析

DOI: 10.11820/dlkxjz.2010.04.006, PP. 427-432

Keywords: 黄淮海平原,水分胁迫,雨养,作物生长模型

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Abstract:

雨养条件下的水分胁迫分析能够反映当地气候土壤条件下作物生长的水分环境对农作物生长的影响,可为农业干旱管理及灌溉策略的实施提供依据,减少农业干旱的发生.本文在阐述EPIC(EnvironmentalPolicyIntegratedClimateModel)作物生长模型水分胁迫计算过程的基础上,模拟黄淮海平原冬小麦在雨养条件下的生长过程,分析水分胁迫现象的时空分异.结果发现,研究区内自然降雨远不能满足冬小麦的正常生长,从水分胁迫现象发生时间上讲,雨养条件下在冬小麦生长期后段(5月中旬以后)水分胁迫现象较为严重,以5月下旬最为严重,重度水分胁迫发生频率高达48.2%;从区域分布上分析,冀鲁豫低洼平原区和山东丘陵农林区水分胁迫现象在整个研究时间段上均较为突出.

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