Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties

Rice straw has been used as ruminant feed in many Asean countries although it is regarded as poor quality feed due to its low protein concentration and digestibility. It has been reported that the nutritive quality of rice straw varies among different varieties and is affected by environmental co...

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Main Author:	Nori, Hollena
Format:	Thesis
Language:	English
Published:	2005
Subjects:	Rice - Nitrogen fertilizers - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/6210/1/FP_2005_24.pdf
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spelling	my-upm-ir.62102023-10-16T03:10:33Z Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties 2005-07 Nori, Hollena Rice straw has been used as ruminant feed in many Asean countries although it is regarded as poor quality feed due to its low protein concentration and digestibility. It has been reported that the nutritive quality of rice straw varies among different varieties and is affected by environmental condition that determines its growth pattern. In view of the reports on the environmental effect on straw quality, this study was designed to evaluate the nutritive quality of rice straw with increasing application of nitrogen fertilizer. Samples of rice straw from two varieties, MR 21 1 and MR 21 9 which were grown under five levels of nitrogen fertilizer (0, 120, 160, 200 and 240 kg Nha) were harvested and analyzed for chemical composition and digestibility. The results showed that the straw nutritive quality was improved with nitrogen application. iii Increases in the level of nitrogen fertilization were found to increase the straw crude protein significantly. The maximum nitrogen level at 240 kg N/ha was found to produce crude protein of 8.45%, which is above the level required for ruminant feed. The straw cell wall (NDF) and fiber (ADF) &tion were found to decrease significantly with nitrogen application. The organic matter digestibility was slightly lowered with increasing nitrogen level. The concentration of hemicellulose, cellulose, lignin (ADL), silica, organic matter, ash and the dry matter digestibility were not affected by the nitrogen fertilization level. In the agronomic characteristics and yield components, the level of nitrogen was shown to increase the tiller numbers, stem height, maturity, number of spikelets per panicle, total spikelets per square meter, grain and straw yield and total yield. There were significant varietal differences in the concentration of cell wall (NDF), hemicellulose, cellulose, lignin (ADL) and silica in rice straw, where MR 21 9 had higher cell wall (NDF), hemicellulose and cellulose concentration where as MR 21 1 had higher amount of lignin (ADL) and silica in the straw. In the agronomic characteristics, MR 219 had higher number of tillers per plant, total panicles per square meter, total spikelets per square meter, grain yield, total yield and grain: straw ratio where as MR 21 1 had shorter stem height, maturity period and higher leaf: stem ratio. Both varieties were shown to produce straw with improved nutritive quality. In comparison between the two varieties, MR 219 is superior to MI2 21 1 in view of its higher grain yield and grain: straw ratio. The grain and straw yield were positively correlated with the straw crude protein and digestibility and negatively correlated with the cell wall (NDF) and fiber (ADF) fraction. Rice - Nitrogen fertilizers - Case studies 2005-07 Thesis http://psasir.upm.edu.my/id/eprint/6210/ http://psasir.upm.edu.my/id/eprint/6210/1/FP_2005_24.pdf text en public masters Universiti Putra Malaysia Rice - Nitrogen fertilizers - Case studies Faculty Agriculture Abdul Halim, Mohd Ridzwan
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Abdul Halim, Mohd Ridzwan
topic	Rice - Nitrogen fertilizers - Case studies
spellingShingle	Rice - Nitrogen fertilizers - Case studies Nori, Hollena Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties
description	Rice straw has been used as ruminant feed in many Asean countries although it is regarded as poor quality feed due to its low protein concentration and digestibility. It has been reported that the nutritive quality of rice straw varies among different varieties and is affected by environmental condition that determines its growth pattern. In view of the reports on the environmental effect on straw quality, this study was designed to evaluate the nutritive quality of rice straw with increasing application of nitrogen fertilizer. Samples of rice straw from two varieties, MR 21 1 and MR 21 9 which were grown under five levels of nitrogen fertilizer (0, 120, 160, 200 and 240 kg Nha) were harvested and analyzed for chemical composition and digestibility. The results showed that the straw nutritive quality was improved with nitrogen application. iii Increases in the level of nitrogen fertilization were found to increase the straw crude protein significantly. The maximum nitrogen level at 240 kg N/ha was found to produce crude protein of 8.45%, which is above the level required for ruminant feed. The straw cell wall (NDF) and fiber (ADF) &tion were found to decrease significantly with nitrogen application. The organic matter digestibility was slightly lowered with increasing nitrogen level. The concentration of hemicellulose, cellulose, lignin (ADL), silica, organic matter, ash and the dry matter digestibility were not affected by the nitrogen fertilization level. In the agronomic characteristics and yield components, the level of nitrogen was shown to increase the tiller numbers, stem height, maturity, number of spikelets per panicle, total spikelets per square meter, grain and straw yield and total yield. There were significant varietal differences in the concentration of cell wall (NDF), hemicellulose, cellulose, lignin (ADL) and silica in rice straw, where MR 21 9 had higher cell wall (NDF), hemicellulose and cellulose concentration where as MR 21 1 had higher amount of lignin (ADL) and silica in the straw. In the agronomic characteristics, MR 219 had higher number of tillers per plant, total panicles per square meter, total spikelets per square meter, grain yield, total yield and grain: straw ratio where as MR 21 1 had shorter stem height, maturity period and higher leaf: stem ratio. Both varieties were shown to produce straw with improved nutritive quality. In comparison between the two varieties, MR 219 is superior to MI2 21 1 in view of its higher grain yield and grain: straw ratio. The grain and straw yield were positively correlated with the straw crude protein and digestibility and negatively correlated with the cell wall (NDF) and fiber (ADF) fraction.
format	Thesis
qualification_level	Master's degree
author	Nori, Hollena
author_facet	Nori, Hollena
author_sort	Nori, Hollena
title	Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties
title_short	Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties
title_full	Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties
title_fullStr	Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties
title_full_unstemmed	Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties
title_sort	effects of nitrogen fertilization levels on the straw nutritive quality of mr 211 and mr 219 rice varieties
granting_institution	Universiti Putra Malaysia
granting_department	Faculty Agriculture
publishDate	2005
url	http://psasir.upm.edu.my/id/eprint/6210/1/FP_2005_24.pdf
_version_	1783725703263420416

Effects of Nitrogen Fertilization Levels on the Straw Nutritive Quality of Mr 211 and Mr 219 Rice Varieties

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