摘要
应用Penman—Montieth、Priestley—Taylor和FAO-24 Blaney—Criddle3种方法计算了太行山山前平原高产区的参考作物蒸散量并对计算结果和利用实际蒸散量计算的作物系数进行了分析，结果表明：Penman—Montieth公式和FAO-24Blaney—Criddle公式估算的参考作物蒸散量结果相近，而Priestley—Taylor方法结果偏低；在不同公式基础上计算的作物系数也存在着明显的差异，以Penman—Montieth公式为基础计算的作物系数比较合理，FAO一24Blaney—Criddle计算的作物系数在4月到10月之间比较合理，Priestley—Taylor公式计算的作物系数偏高；在分析了多年作物系数的基础上，对不同水分年型下的作物需水量和灌溉需水量进行了计算，冬小麦和夏玉米季的灌溉需水量分别在270～400mm和O～330mm之间。
Reference evapotranspiration was estimated by using Penman-Montieth （P-M） equation, Priestly- Taylor（P-T） equation and FAO-24 Blaney-Criddle （B-C） equation, and crop coefficient was also calculated by using the reference and actual evapotranspiration. Results show that the reference evapotranspiration calculated by using P-M equation is similar to that by using B-C equation, and the estimation calculated by using P-T equation is obviously lower than that of others. The crop coefficients calculated by using three equations are also significant different, and it is suitable using P-M equation and using B-C equation during April to October according to the annual change of crop coefficient. However, the crop coefficient calculated by using P-T equation is remarkably higher than that of others. The irrigation demands were also estimated based on the crop water requirements and rainfall which were significant different in difference rainfall years. The irrigation demands range is from 270 mm to 400 mm and 0 to 330mm for winter wheat and summer maize, respectively.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2007年第2期26-30,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金(40371024)
国家科技攻关课题(2004ba508b01)
关键词
太行山山前平原
参考作物蒸散量
实际蒸散量
作物需水量
piedmont of Taihang Mountain
reference evapotranspiration
actual evapotranspiration
crop irrigation demands
