气候变暖背景下华北平原冬小麦生育期温度条件变化趋势分析

被引：30

作者：

谭凯炎

邬定荣

赵花荣

机构：

[1] 中国气象科学研究院

来源：

中国农业气象 | 2017年 / 38卷 / 06期

关键词：

气候变暖; 增温; 冬小麦; 发育期; 气象条件; 华北平原;

D O I：

暂无

中图分类号：

S512.11 [];

学科分类号：

0901 ;

摘要：

利用华北平原42个农业气象观测站1981-2010年逐日平均气温和冬小麦发育期观测资料,结合增温试验数据,统计分析冬小麦生长季各月平均气温的变化特征、冬小麦关键发育日期和各主要生育阶段平均气温的变化趋势,以探究气候变暖对华北平原冬小麦生育过程温度条件的影响。结果表明:研究期内华北平原冬小麦生长季的10月、12月和2-6月增温趋势显著,2月平均气温上升线性倾向率最大。气候变暖使冬小麦越冬阶段和返青-拔节阶段的平均温度显著升高,从而导致冬小麦拔节-成熟日期显著提前,但冬小麦冬前生长阶段和拔节-成熟阶段的平均温度则未呈现上升趋势。冬小麦冬前生长阶段的温度环境因播种期适应性推迟而保持基本稳定,拔节-成熟阶段平均温度变化不明显则归因于发育期前移和当地气温的季节性变化特点。气候进一步变暖将使冬小麦冬后发育期提前更多,而拔节-成熟阶段的平均温度则不会明显升高。

引用

页码：333 / 341

页数：9

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