利用反推法进行农田灌溉预报的初步研究  

A Study on Farmland Irrigation Forecast by the Method of Counter deduction

作　　者：肖俊夫[1] 陈玉民[1] 孙景生[1] 

机构地区：[1]中国农科院农田灌溉研究所

出　　处：《灌溉排水》1997年第1期29-32,共4页Irrigation and Drainage

基　　金：国家自然科学基金

摘　　要：根据农田水量平衡方程，在假设某地块土壤水分降至作物适宜水分下限值时，反推上次灌水日期，而后根据预报时段的作物耗水量与降水量大小比较，预报某月某日以前灌水地块灌水与否。每旬初如此反复预报直至作物生长结束。Based on the water balance equation and on the assumption that soil moisture in the field declined to the proper lower limit,the date of last irrigation was deduced reversely.Then,according to the comparision between crop water consumption and rainfall during the forecasting period,the field which was previously irrigated at a given date can be predicted whether it needs to be irrigated or not.This predicting procedure is repeated at the beginning of a ten day time span until the end of crop growth.In this way,farm water use has been managed dynamically in the whole period of crop growth.

关 键 词：农田水量平衡 作物耗水量 土壤水分 灌溉 

分 类 号：S275[农业科学—农业水土工程]