Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization

The use of periodical water stress and potassium fertilization may enhance rice tolerance to drought stress and improve the crop’s instantaneous water use efficiency without much yield reduction. This study was conducted to assess the effects of different periodical water stress combined with potass...

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Main Authors: Mohd Zain, Nurul Amalina, Ismail, Mohd Razi, Mahmood, Maziah, Puteh, Adam, Ibrahim, Mohd Hafiz
Format: Article
Language:English
Published: MDPI 2014
Online Access:http://psasir.upm.edu.my/id/eprint/36362/1/Alleviation%20of%20water%20stress%20effects%20on%20MR220%20rice%20by%20application%20of%20periodical%20water%20stress%20and%20potassium%20fertilization.pdf
http://psasir.upm.edu.my/id/eprint/36362/
http://www.mdpi.com/1420-3049/19/2/1795
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Institution: Universiti Putra Malaysia
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spelling my.upm.eprints.363622015-10-06T04:24:01Z http://psasir.upm.edu.my/id/eprint/36362/ Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization Mohd Zain, Nurul Amalina Ismail, Mohd Razi Mahmood, Maziah Puteh, Adam Ibrahim, Mohd Hafiz The use of periodical water stress and potassium fertilization may enhance rice tolerance to drought stress and improve the crop’s instantaneous water use efficiency without much yield reduction. This study was conducted to assess the effects of different periodical water stress combined with potassium fertilization regimes on growth, yield, leaf gas exchanges and biochemical changes in rice grown in pots and compare them with standard local rice grower practices. Five treatments including (1) standard local grower’s practice (control, 80CF = 80 kg K2O/ha + control flooding); (2) 120PW15 = 120 kg K2O/ha + periodical water stress for 15 days; (3) 120DS15V = 120 kg K2O/ha + drought stress for 15 days during the vegetative stage; (4) 120DS25V = 120 kg K2O/ha + drought stress for 25 days and (5) 120DS15R = 120 kg K2O/ha + drought stress for 15 days during the reproductive stage, were evaluated in this experiment. Control and 120PW15 treatments were stopped at 100 DAS, and continuously saturated conditions were applied until harvest. It was found that rice under 120PW15 treatment showed tolerance to drought stress evidenced by increased water use efficiency, peroxidase (POX), catalase (CAT) and proline levels, maximum efficiency of photosystem II (fv/fm) and lower minimal fluorescence (fo), compared to other treatments. Path coefficient analysis revealed that most of parameters contribute directly rather than indirectly to rice yield. In this experiment, there were four factors that are directly involved with rice yield: grain soluble sugar, photosynthesis, water use efficiency and total chlorophyll content. The residual factors affecting rice yield are observed to be quite low in the experiment (0.350), confirming that rice yield was mostly influenced by the parameters measured during the study. MDPI 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/36362/1/Alleviation%20of%20water%20stress%20effects%20on%20MR220%20rice%20by%20application%20of%20periodical%20water%20stress%20and%20potassium%20fertilization.pdf Mohd Zain, Nurul Amalina and Ismail, Mohd Razi and Mahmood, Maziah and Puteh, Adam and Ibrahim, Mohd Hafiz (2014) Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization. Molecules, 19 (2). pp. 1795-1819. ISSN 1431-5157; ESSN: 1420-3049 http://www.mdpi.com/1420-3049/19/2/1795 10.3390/molecules19021795
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 The use of periodical water stress and potassium fertilization may enhance rice tolerance to drought stress and improve the crop’s instantaneous water use efficiency without much yield reduction. This study was conducted to assess the effects of different periodical water stress combined with potassium fertilization regimes on growth, yield, leaf gas exchanges and biochemical changes in rice grown in pots and compare them with standard local rice grower practices. Five treatments including (1) standard local grower’s practice (control, 80CF = 80 kg K2O/ha + control flooding); (2) 120PW15 = 120 kg K2O/ha + periodical water stress for 15 days; (3) 120DS15V = 120 kg K2O/ha + drought stress for 15 days during the vegetative stage; (4) 120DS25V = 120 kg K2O/ha + drought stress for 25 days and (5) 120DS15R = 120 kg K2O/ha + drought stress for 15 days during the reproductive stage, were evaluated in this experiment. Control and 120PW15 treatments were stopped at 100 DAS, and continuously saturated conditions were applied until harvest. It was found that rice under 120PW15 treatment showed tolerance to drought stress evidenced by increased water use efficiency, peroxidase (POX), catalase (CAT) and proline levels, maximum efficiency of photosystem II (fv/fm) and lower minimal fluorescence (fo), compared to other treatments. Path coefficient analysis revealed that most of parameters contribute directly rather than indirectly to rice yield. In this experiment, there were four factors that are directly involved with rice yield: grain soluble sugar, photosynthesis, water use efficiency and total chlorophyll content. The residual factors affecting rice yield are observed to be quite low in the experiment (0.350), confirming that rice yield was mostly influenced by the parameters measured during the study.
format Article
author Mohd Zain, Nurul Amalina
Ismail, Mohd Razi
Mahmood, Maziah
Puteh, Adam
Ibrahim, Mohd Hafiz
spellingShingle Mohd Zain, Nurul Amalina
Ismail, Mohd Razi
Mahmood, Maziah
Puteh, Adam
Ibrahim, Mohd Hafiz
Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization
author_facet Mohd Zain, Nurul Amalina
Ismail, Mohd Razi
Mahmood, Maziah
Puteh, Adam
Ibrahim, Mohd Hafiz
author_sort Mohd Zain, Nurul Amalina
title Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization
title_short Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization
title_full Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization
title_fullStr Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization
title_full_unstemmed Alleviation of water stress effects on MR220 rice by application of periodical water stress and potassium fertilization
title_sort alleviation of water stress effects on mr220 rice by application of periodical water stress and potassium fertilization
publisher MDPI
publishDate 2014
url http://psasir.upm.edu.my/id/eprint/36362/1/Alleviation%20of%20water%20stress%20effects%20on%20MR220%20rice%20by%20application%20of%20periodical%20water%20stress%20and%20potassium%20fertilization.pdf
http://psasir.upm.edu.my/id/eprint/36362/
http://www.mdpi.com/1420-3049/19/2/1795
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