Articles
WATER BALANCE UNDER PLASTIC HOUSE CONDITIONS IN EGYPT
Article number
303_8
Pages
61 – 72
Language
Abstract
Irrigation water requirements were calculated on the basis of class "A" pan evaporation measurements taken in carnation and pepper non-heated plastic houses.
Relative humidity was also measured.
A linear correlation formula was developed to estimate the pan evaporation as a function of average daily relative humidity in the open field.
A half cubic meter drainage lysimeter filled with clay and sandy soils were used to test the formula.
The drainage water was collected daily through a perforated tube buried in the bottom of the lysimeter.
The amount of water added was calculated and the amount of the drained water was subtracted to estimate the actual evapotranspiration.
Relative humidity was also measured.
A linear correlation formula was developed to estimate the pan evaporation as a function of average daily relative humidity in the open field.
A half cubic meter drainage lysimeter filled with clay and sandy soils were used to test the formula.
The drainage water was collected daily through a perforated tube buried in the bottom of the lysimeter.
The amount of water added was calculated and the amount of the drained water was subtracted to estimate the actual evapotranspiration.
The relative humidity (RH) varied between 42 and 82%. The pan evaporation values ranged between 0.70 and 4.10 mm/day throughout the year.
The regression analysis indicated a high correlation coefficient between the two variables.
The formula can be used to estimate pan evaporation under plastic house conditions in arid lands.
Publication
Authors
A.F. Abou-Hadid, A.S. El-Beltagy
Keywords
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