Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.)

In the first experiment, high temperature tolerance, in terms of transplanting dates (1st May, 21st May and 10th June) was tested on six Iranian rice cultivars. The response of rice cultivars and transplanting dates for the morphological, and yield components showed the crop sown on 1st and 21st...

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Main Author:	Karbalaei Aghamolki, Mohammad Taghi
Format:	Thesis
Language:	English
Published:	2016
Subjects:	Rice - Growth Rice - Effect of temperature on Rice - Fertilizers
Online Access:	http://psasir.upm.edu.my/id/eprint/92662/1/FP%202016%2058%20-%20IR.pdf
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spelling	my-upm-ir.926622022-04-13T01:10:38Z Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.) 2016-02 Karbalaei Aghamolki, Mohammad Taghi In the first experiment, high temperature tolerance, in terms of transplanting dates (1st May, 21st May and 10th June) was tested on six Iranian rice cultivars. The response of rice cultivars and transplanting dates for the morphological, and yield components showed the crop sown on 1st and 21st May had better growth and yield components which resulted higher grain yield (6625 kg ha") of Neda cultivar. The second experiment was glass house conducted to evaluate the effects of high temperature (38±2°C) stress and normal temperature (32±2°C) on seven rice cultivars. The results showed the greater weight of 1000 grains (26.97 g) observed in Neda grown in normal condition. The maximum grain yield (51.3 g pot") was noted in MR219 planted in normal condition. In third experiment, the effect of normal and heat stress temperatures were tested on four rice cultivars (Fajr, Hashemi and Hovaze as exotic and MR219 as indigenous). The main effects of heat stress and growth stage were significant in all parameters except on effective tillers. The lowest grain yield per pot was observed in Hashemi (6.8 g pot") at flowering stage during heat stress condition and the highest was found in MR219 (42- 45d g pot") during normal condition. In conclusion, the major reason for yield reduction of all cultivars was enhancement of sterile and aborted spikelets numbers when plants exposed to heat stress during booting and flowering phases. The last experiment was conducted on the rice cultivars from previous experiment to evaluate the effect of normal temperature and heat stress using Potassium fertilizer, nitrogen, and Meister-20 (polymer coated urea). The grain yield was significantly higher (25.9 g pot") in the plants grown in normal condition and fertilized with Meister-20 at 160 kg N ha". In the heat stress condition, the grain yield ranged between 15.3 to 17.9 g pot:' in the N fertilized plants which is also considered satisfactory as compared to unfertilized plants in the heat stress condition. Rice - Growth Rice - Effect of temperature on Rice - Fertilizers 2016-02 Thesis http://psasir.upm.edu.my/id/eprint/92662/ http://psasir.upm.edu.my/id/eprint/92662/1/FP%202016%2058%20-%20IR.pdf text en public doctoral Universiti Putra Malaysia Rice - Growth Rice - Effect of temperature on Rice - Fertilizers Yusop, Mohd Khanif
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Yusop, Mohd Khanif
topic	Rice - Growth Rice - Effect of temperature on Rice - Fertilizers
spellingShingle	Rice - Growth Rice - Effect of temperature on Rice - Fertilizers Karbalaei Aghamolki, Mohammad Taghi Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.)
description	In the first experiment, high temperature tolerance, in terms of transplanting dates (1st May, 21st May and 10th June) was tested on six Iranian rice cultivars. The response of rice cultivars and transplanting dates for the morphological, and yield components showed the crop sown on 1st and 21st May had better growth and yield components which resulted higher grain yield (6625 kg ha") of Neda cultivar. The second experiment was glass house conducted to evaluate the effects of high temperature (38±2°C) stress and normal temperature (32±2°C) on seven rice cultivars. The results showed the greater weight of 1000 grains (26.97 g) observed in Neda grown in normal condition. The maximum grain yield (51.3 g pot") was noted in MR219 planted in normal condition. In third experiment, the effect of normal and heat stress temperatures were tested on four rice cultivars (Fajr, Hashemi and Hovaze as exotic and MR219 as indigenous). The main effects of heat stress and growth stage were significant in all parameters except on effective tillers. The lowest grain yield per pot was observed in Hashemi (6.8 g pot") at flowering stage during heat stress condition and the highest was found in MR219 (42- 45d g pot") during normal condition. In conclusion, the major reason for yield reduction of all cultivars was enhancement of sterile and aborted spikelets numbers when plants exposed to heat stress during booting and flowering phases. The last experiment was conducted on the rice cultivars from previous experiment to evaluate the effect of normal temperature and heat stress using Potassium fertilizer, nitrogen, and Meister-20 (polymer coated urea). The grain yield was significantly higher (25.9 g pot") in the plants grown in normal condition and fertilized with Meister-20 at 160 kg N ha". In the heat stress condition, the grain yield ranged between 15.3 to 17.9 g pot:' in the N fertilized plants which is also considered satisfactory as compared to unfertilized plants in the heat stress condition.
format	Thesis
qualification_level	Doctorate
author	Karbalaei Aghamolki, Mohammad Taghi
author_facet	Karbalaei Aghamolki, Mohammad Taghi
author_sort	Karbalaei Aghamolki, Mohammad Taghi
title	Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.)
title_short	Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.)
title_full	Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.)
title_fullStr	Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.)
title_full_unstemmed	Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.)
title_sort	effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (oryza sativa l.)
granting_institution	Universiti Putra Malaysia
publishDate	2016
url	http://psasir.upm.edu.my/id/eprint/92662/1/FP%202016%2058%20-%20IR.pdf
_version_	1747813750547677184

Effect of heat stress and planting date on yield, grain quality and fertilizer uptake of rice cultivars (Oryza sativa L.)

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