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Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition

Realistic estimate of evapotranspiration (ET) is a major factor in agricultural planning and determining crop production potential of a given region. It varies with crop growth stage. An assessment of water loss as evapotranspiration was conducted using field testing of a simplified, sensitive and a...

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Main Authors: Abdullahi, Abubakar Sadiq, Ahmad, Desa, Mohd Soom, Mohd Amin, Mohamed Shariff, Abdul Rashid
Format: Conference or Workshop Item
Language:English
Published: Faculty of Engineering, Universiti Putra Malaysia 2012
Online Access:http://psasir.upm.edu.my/id/eprint/50656/1/_TechnicalPapers_CAFEi2012_44.pdf
http://psasir.upm.edu.my/id/eprint/50656/
http://cafei.upm.edu.my/download.php?filename=/TechnicalPapers/CAFEi2012_44.pdf
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spelling my.upm.eprints.506562017-03-02T06:11:11Z http://psasir.upm.edu.my/id/eprint/50656/ Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition Abdullahi, Abubakar Sadiq Ahmad, Desa Mohd Soom, Mohd Amin Mohamed Shariff, Abdul Rashid Realistic estimate of evapotranspiration (ET) is a major factor in agricultural planning and determining crop production potential of a given region. It varies with crop growth stage. An assessment of water loss as evapotranspiration was conducted using field testing of a simplified, sensitive and accurate microlysimeter for ponded paddy field. A constant water level is maintained in the microlysimeter with a Marriott tube system and water losses from the manometer were measured. Daily variations of ET and deep percolation (DP) were determined in Peninsula Malaysia for main (August to December) and off (January to May) season cropping. Measured evapotranspiration values were compared between season and location. The average ET rates of rice growing areas are in the range of 3.3 – 6.2 and 4.6 – 6.5 mm day-1 for main and off season respectively. The relationships between ET and paddy growth period for the entire site had highly significant values with r2 > 83 %, and the DP is between 0.35 and 2.1 mm day-1. The study showed no significant difference in the rate of ET for both seasons and locations. The microlysimeter with the Marriott tube systems measures evapotranspiration on daily or hourly basis and can be fabricated locally. Faculty of Engineering, Universiti Putra Malaysia 2012 Conference or Workshop Item PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/50656/1/_TechnicalPapers_CAFEi2012_44.pdf Abdullahi, Abubakar Sadiq and Ahmad, Desa and Mohd Soom, Mohd Amin and Mohamed Shariff, Abdul Rashid (2012) Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition. In: International Conference on Agricultural and Food Engineering for Life (Cafei2012), 26-28 Nov. 2012, Palm Garden Hotel, Putrajaya. (pp. 131-140). http://cafei.upm.edu.my/download.php?filename=/TechnicalPapers/CAFEi2012_44.pdf
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Realistic estimate of evapotranspiration (ET) is a major factor in agricultural planning and determining crop production potential of a given region. It varies with crop growth stage. An assessment of water loss as evapotranspiration was conducted using field testing of a simplified, sensitive and accurate microlysimeter for ponded paddy field. A constant water level is maintained in the microlysimeter with a Marriott tube system and water losses from the manometer were measured. Daily variations of ET and deep percolation (DP) were determined in Peninsula Malaysia for main (August to December) and off (January to May) season cropping. Measured evapotranspiration values were compared between season and location. The average ET rates of rice growing areas are in the range of 3.3 – 6.2 and 4.6 – 6.5 mm day-1 for main and off season respectively. The relationships between ET and paddy growth period for the entire site had highly significant values with r2 > 83 %, and the DP is between 0.35 and 2.1 mm day-1. The study showed no significant difference in the rate of ET for both seasons and locations. The microlysimeter with the Marriott tube systems measures evapotranspiration on daily or hourly basis and can be fabricated locally.
format Conference or Workshop Item
author Abdullahi, Abubakar Sadiq
Ahmad, Desa
Mohd Soom, Mohd Amin
Mohamed Shariff, Abdul Rashid
spellingShingle Abdullahi, Abubakar Sadiq
Ahmad, Desa
Mohd Soom, Mohd Amin
Mohamed Shariff, Abdul Rashid
Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition
author_facet Abdullahi, Abubakar Sadiq
Ahmad, Desa
Mohd Soom, Mohd Amin
Mohamed Shariff, Abdul Rashid
author_sort Abdullahi, Abubakar Sadiq
title Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition
title_short Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition
title_full Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition
title_fullStr Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition
title_full_unstemmed Estimating evapotranspiration from paddy (Oryza sativa) field under humid tropical condition
title_sort estimating evapotranspiration from paddy (oryza sativa) field under humid tropical condition
publisher Faculty of Engineering, Universiti Putra Malaysia
publishDate 2012
url http://psasir.upm.edu.my/id/eprint/50656/1/_TechnicalPapers_CAFEi2012_44.pdf
http://psasir.upm.edu.my/id/eprint/50656/
http://cafei.upm.edu.my/download.php?filename=/TechnicalPapers/CAFEi2012_44.pdf
_version_ 1643834727454474240
score 13.211869

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