摘要
科学合理的灌水定额能减少深层渗漏量,可以有效避免灌溉水的浪费,在农业生产中极为重要。利用HYDRUS-1D模型对元氏冬小麦3个生育时期的土壤水分动态、深层渗漏规律进行模拟研究,探讨适宜的灌水定额。模型验证结果表明冬小麦3个生育时期土壤含水率模拟值与实测值相关系数达到了a=0.05水平上的显著,模拟值与实测值吻合较好。利用验证后的模拟模型模拟研究了冬小麦3个生育时期、不同灌水定额、不同土层深度的土壤水分变化动态和深层渗漏量,回归分析结果表明深层渗漏量与灌水定额之间呈正相关关系,与土层深度之间呈负相关关系。建议元氏冬小麦返青期、拔节期和开花期的适宜灌水定额分别为<90、90和90 mm,以减少深层渗漏量、促进水资源的充分合理利用。
Scientific and reasonable irrigation requirement can reduce deep seepage and avoid the waste of irrigation water effectively,which is extremely important in the agricultural production.This research employed the HYDRUS-1D model to make a simulation research for dynamics of soil water and law of deep leakage in three growth stages of Yuanshi winter wheat,and explored the suitable irrigation requirement.The model results showed that the related coefficient between simulated and measured values of soil moisture content in three growth periods of winter wheat was significant at the level of a=0.05,and the simulated value was suitable for the measured value.The dynamic changes of soil moisture and the amount of deep leakage in three growth periods,different irrigation requirements and different soil depths of winter wheat were studied by using the validated simulation model.Results of regression analysis showed the positive correlation between deep leakage and irrigation requirement,and the lack of positive correlation with soil depths.It suggested that the suitable irrigation requirement of Yuanshi winter wheat in regreening stage,jointing stage and flowering stage was less than 90,90 and 90 mm respectively to reduce deep seepage and promote the full and reasonable utilization of water resources.
作者
王遥
刘玉春
王宁
姜长松
WANG Yao;LIU Yuchun;WANG Ning;JIANG Changsong(College of Urban and Rural Construction,Hebei Agricultural University,Baoding 071001,China)
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2020年第4期104-111,共8页
Journal of Hebei Agricultural University
基金
石家庄市科学技术研究与发展计划项目(171491322A).
