摘要
从土壤－作物－大气系统出发，采用最新公认的Ｐｅｎｍａｎ－Ｍｏｎｔｅｉｔｈ潜在蒸散业务计算方法，并考虑底墒和灌溉因素，计算了华北地区各点多年小麦土壤水分平衡，在此基础上，以各发育阶段实际蒸散与农田最大蒸散的差值衡量小麦水分亏缺程度，分析了水分亏缺的时空变化规律及其与小麦干旱的关系；本研究有助于小麦干旱的分布规律、监测及影响评估研究，并可为合理利用水资源，促进农业持续发展提供依据。
From the point of view of the soil-plant-atmosphere system,the soil water balanceis calculated by taking the soil moisture and irrigation factors into account based on theupdate operational estiYnates of potential evapotranspiration by Penman-Monteith.Onthe basis of it the water deficits measured against the difference between actualevapotranspiration and crop maximum evapotranspiration in each development stage ofthe winter wheat in North China are computed ,and the characteristics of spacial andtemporal distribution of water deficits are analysed.The relationship betvveen the waterdeficits and wheat drought is also studied.The resuIts are useful for monitoring andassessing of wheat drought and also for rational irrigation scheme and sustainabledevelopment of agricuIture.
出处
《应用气象学报》
CSCD
北大核心
1995年第A01期42-48,共7页
Journal of Applied Meteorological Science
基金
中国气象局部门重点课题
关键词
小麦
水分
亏缺
土壤水分
Soil water
Crop water deficits
Wheat drought.
