Performance of site-specific nutrient management for irrigated rice in Southeast China
Rice (Oryza sativa L.) yield increases in Zhejiang, China have slowed since 1985 despite the increasing use of hybrids and fertilizers. On‐farm experiments at 21 sites were conducted to evaluate a new approach for site‐specific nutrient management (SSNM). Field‐ and season‐specific N–P–K application...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Wiley
2001
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| Online Access: | https://hdl.handle.net/10568/167036 |
| _version_ | 1855531924463812608 |
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| author | Wang, Guanghuo Dobermann, Achim Witt, Christian Sun, Quingzhu Fu, Rongxing |
| author_browse | Dobermann, Achim Fu, Rongxing Sun, Quingzhu Wang, Guanghuo Witt, Christian |
| author_facet | Wang, Guanghuo Dobermann, Achim Witt, Christian Sun, Quingzhu Fu, Rongxing |
| author_sort | Wang, Guanghuo |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Rice (Oryza sativa L.) yield increases in Zhejiang, China have slowed since 1985 despite the increasing use of hybrids and fertilizers. On‐farm experiments at 21 sites were conducted to evaluate a new approach for site‐specific nutrient management (SSNM). Field‐ and season‐specific N–P–K applications were calculated by accounting for the indigenous nutrient supply, yield targets, and nutrient demand as a function of the interactions between N, P, and K. Nitrogen applications were fine‐tuned based on season‐specific rules and field‐specific monitoring of crop N status. The performance of SSNM was tested for four successive rice crops. Compared with the current farmers' fertilizer practice (FFP), average grain yield increased from 5.9 to 6.4 Mg ha−1 while plant N, P, and K uptake increased by 8 to 14%. The gross return over fertilizer cost was about 10% greater with SSNM than with FFP. Yields were about 20% greater in late rice (hybrid cultivars) than in early rice (inbred cultivars), but SSNM performed equally better than FFP in both seasons. Improved timing and splitting of fertilizer N increased N recovery efficiency from 0.18 kg kg−1 in FFP plots to 0.29 kg kg−1 in SSNM plots. The agronomic N use efficiency (grain yield increase per kilogram fertilizer applied) was 80% greater with SSNM than with FFP. As defined in our study, SSNM has potential for improving yields and nutrient efficiency in irrigated rice. Future research needs to develop a practical approach for achieving similar benefits across large areas without field‐specific modeling and with minimum crop monitoring. |
| format | Journal Article |
| id | CGSpace167036 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2001 |
| publishDateRange | 2001 |
| publishDateSort | 2001 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1670362025-02-19T14:26:05Z Performance of site-specific nutrient management for irrigated rice in Southeast China Wang, Guanghuo Dobermann, Achim Witt, Christian Sun, Quingzhu Fu, Rongxing agronomy crop science Rice (Oryza sativa L.) yield increases in Zhejiang, China have slowed since 1985 despite the increasing use of hybrids and fertilizers. On‐farm experiments at 21 sites were conducted to evaluate a new approach for site‐specific nutrient management (SSNM). Field‐ and season‐specific N–P–K applications were calculated by accounting for the indigenous nutrient supply, yield targets, and nutrient demand as a function of the interactions between N, P, and K. Nitrogen applications were fine‐tuned based on season‐specific rules and field‐specific monitoring of crop N status. The performance of SSNM was tested for four successive rice crops. Compared with the current farmers' fertilizer practice (FFP), average grain yield increased from 5.9 to 6.4 Mg ha−1 while plant N, P, and K uptake increased by 8 to 14%. The gross return over fertilizer cost was about 10% greater with SSNM than with FFP. Yields were about 20% greater in late rice (hybrid cultivars) than in early rice (inbred cultivars), but SSNM performed equally better than FFP in both seasons. Improved timing and splitting of fertilizer N increased N recovery efficiency from 0.18 kg kg−1 in FFP plots to 0.29 kg kg−1 in SSNM plots. The agronomic N use efficiency (grain yield increase per kilogram fertilizer applied) was 80% greater with SSNM than with FFP. As defined in our study, SSNM has potential for improving yields and nutrient efficiency in irrigated rice. Future research needs to develop a practical approach for achieving similar benefits across large areas without field‐specific modeling and with minimum crop monitoring. 2001-07 2024-12-19T12:56:56Z 2024-12-19T12:56:56Z Journal Article https://hdl.handle.net/10568/167036 en Wiley Wang, Guanghuo; Dobermann, Achim; Witt, Christian; Sun, Quingzhu and Fu, Rongxing. 2001. Performance of site-specific nutrient management for irrigated rice in Southeast China. Agronomy Journal, Volume 93 no. 4 p. 869-878 |
| spellingShingle | agronomy crop science Wang, Guanghuo Dobermann, Achim Witt, Christian Sun, Quingzhu Fu, Rongxing Performance of site-specific nutrient management for irrigated rice in Southeast China |
| title | Performance of site-specific nutrient management for irrigated rice in Southeast China |
| title_full | Performance of site-specific nutrient management for irrigated rice in Southeast China |
| title_fullStr | Performance of site-specific nutrient management for irrigated rice in Southeast China |
| title_full_unstemmed | Performance of site-specific nutrient management for irrigated rice in Southeast China |
| title_short | Performance of site-specific nutrient management for irrigated rice in Southeast China |
| title_sort | performance of site specific nutrient management for irrigated rice in southeast china |
| topic | agronomy crop science |
| url | https://hdl.handle.net/10568/167036 |
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