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Item

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Four levels of in- organic fertilizer (0%, 50%, 75%, and 100% NPK), based on recommended rates of 150 kg N ha−1, 70 kg P2O5 ha−1, and 120 kg K2O ha−1, were used with cow manure, poultry manure, and vermicompost (5 t•ha−1each) in a split-plot design with three replicates. In both seasons, with 50% NPK, the N uptake level achieved with poultry manure was similar to that obtained with 75% and 100% NPK. The greatest N use, internal, agronomic N use, and recovery effi- ciencies were obtained with 50% NPK + poultry manure, but were similar to those obtained from cow manure and vermicompost subplots. As the amount of applied N from organic and inorganic fertilizer increased, the N use effi- ciency and related parameters decreased, due to similar yields among plots with different NPK application levels. Poultry manure resulted in the highest significant correlations between applied N and N accumulation, followed by cow manure and vermicompost, in both seasons. Neither chemical fertilizer nor organic manure alone led to optimum N use and N recovery efficiencies. The combination of 50% inorganic fertilizer (75 kg N ha−1) and poultry ma- nure (5 t•ha−1) enhanced the N uptake, the N use and recovery efficiencies of hybrid rice. Cow manure (5 t•ha−1) in combination with 75% inorganic ferti- lizer (112.5 kg N ha−1) was an adequate substitute for reduced chemical ferti- lizer usage. 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Effects of Combined Application of Inorganic Fertilizer and Organic Manures on Nitrogen Use and Recovery Efficiencies of Hybrid Rice (Palethwe-1)

http://hdl.handle.net/20.500.12678/0000000096
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defd0474-6e82-43d2-a041-676b5896a990
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Paper Paper 1.pdf (2169 Kb)
Publication type
Journal article
Upload type
Publication
Title
Title Effects of Combined Application of Inorganic Fertilizer and Organic Manures on Nitrogen Use and Recovery Efficiencies of Hybrid Rice (Palethwe-1)
Language en_US
Publication date 2017
Authors
Kyi Moe
Kumudra Win Mg
Kyaw Kyaw Win
Yamakawa, Takeo
Description
We conducted two field experiments to investigate combined effects of or- ganic and inorganic fertilizers on nitrogen use and recovery efficiencies of hybrid rice (Palethwe-1) during dry and wet seasons, 2015. Four levels of in- organic fertilizer (0%, 50%, 75%, and 100% NPK), based on recommended rates of 150 kg N ha−1, 70 kg P2O5 ha−1, and 120 kg K2O ha−1, were used with cow manure, poultry manure, and vermicompost (5 t•ha−1each) in a split-plot design with three replicates. In both seasons, with 50% NPK, the N uptake level achieved with poultry manure was similar to that obtained with 75% and 100% NPK. The greatest N use, internal, agronomic N use, and recovery effi- ciencies were obtained with 50% NPK + poultry manure, but were similar to those obtained from cow manure and vermicompost subplots. As the amount of applied N from organic and inorganic fertilizer increased, the N use effi- ciency and related parameters decreased, due to similar yields among plots with different NPK application levels. Poultry manure resulted in the highest significant correlations between applied N and N accumulation, followed by cow manure and vermicompost, in both seasons. Neither chemical fertilizer nor organic manure alone led to optimum N use and N recovery efficiencies. The combination of 50% inorganic fertilizer (75 kg N ha−1) and poultry ma- nure (5 t•ha−1) enhanced the N uptake, the N use and recovery efficiencies of hybrid rice. Cow manure (5 t•ha−1) in combination with 75% inorganic ferti- lizer (112.5 kg N ha−1) was an adequate substitute for reduced chemical ferti- lizer usage. Therefore, this study highlighted combined application of inorganic fertilizers and organic manures had the benefits not only in reducing the need for chemical fertilizers but also in improving N uptake by hybrid rice (Palethwe-1) leading to the better environment.
Keywords
Nitrogen Uptake
Identifier https://yauor-yau.archive.knowledgearc.net/handle/123456789/65
Journal articles
American Journal of Plant Sciences
Conference papaers
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Thesis/dissertations
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