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中文摘要: 本文根据邯郸地区的观测资料,建立了小麦、玉米和棉花地的土壤相对含水量和14时冠气温差(Tc-Ta)的作物旱情温差模型RW=a+b(Tc-Ta)14和裸地土壤相对含水量和14时土气温差(Ts—Ta)的土壤旱情温差模型RW=a′+b′(Ts-Ta)14。经检验,平均相对误差小于20%,适于灌溉管理和大面积监测旱情之用,具有快速、简便的特点。本文还提出了冠层温度的覆盖度校正方法和进行旱涝等级划分的温差指标。
中文关键词:
Abstract:The canopy-air temperature-difference models, RW = a + b (Tc-Ta), for wheat, corn and cotton, and the soil-air temperature difference model, RW = a' + b'(Ts -Ta), for bare soil were developed based on the data observed in Handan area in 1990 and 1991. The average relative error was less than 20%. The models are simple and easy to be used for irrigation management and drought monitoring over large areas. The method of crop coverage calibration for the canopy temperature and the temperature-difference indexes of the drought grades were also presented in this paper.
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基金项目:国家自然科学基金资助项目和河北省项目
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引用文本：
李韵珠,陆锦文,吕梅,史美胡,牛德贵,赵秀英,1992.作物和土壤旱情的温差模型[J].气象,18(5):9-15.
,1992.The temperature-difference models for crop and soil water stress[J].Meteor Mon,18(5):9-15.
李韵珠,陆锦文,吕梅,史美胡,牛德贵,赵秀英,1992.作物和土壤旱情的温差模型[J].气象,18(5):9-15.
,1992.The temperature-difference models for crop and soil water stress[J].Meteor Mon,18(5):9-15.