Abstract
据联合国粮农组织(FAO)推荐的参考作物蒸散计算方法和相关作物系数, 利用河北省84个地面气象站的资料, 计算了河北省主要作物冬小麦和玉米近35年(1965~1999年)的需水量和缺水量, 并分析了其变化趋势。结果表明: 河北省主要作物冬小麦和玉米的需水量在近35年呈减少趋势, 每10年下降量冬小麦全省平均26 mm, 其中中南部地区28 mm, 东部地区15mm; 夏玉米全省平均9.7 mm, 其中南部地区9.4 mm, 中部地区10.2 mm; 春玉米全省平均9.9 mm, 其中东部地区8.8 mm, 北部地区10.5 mm。全省和各区域作物需水量变化均通过0.05信度的显著性检验。不同作物缺水量不同, 其中冬小麦最多, 全省平均345 mm, 夏玉米20 mm, 春玉米29 mm; 虽然不同作物均表现出缺水增加的趋势, 但不显著。
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
