Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice
Nutrient supplies from indigenous sources (IS) can be estimated by measuring plant nutrient uptake in nutrient omission plots. On‐farm experiments were conducted in irrigated rice (Oryza sativa L.) domains of Asia to evaluate relationships of plant N, P, and K uptake with soil tests or grain yield m...
| Autores principales: | , , , , , , , , , , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2003
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/166858 |
| _version_ | 1855536890137018368 |
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| author | Dobermann, A. Witt, C. Abdulrachman, S. Gines, H.C. Nagarajan, R. Son, T.T. Tan, P.S. Wang, G.H. Chien, N.V. Thoa, V. T. K. Phung, C.V. Stalin, P. Muthukrishnan, P. Ravi, V. Babu, M. Simbahan, G.C. Adviento, M. A. A. Bartolome, V. |
| author_browse | Abdulrachman, S. Adviento, M. A. A. Babu, M. Bartolome, V. Chien, N.V. Dobermann, A. Gines, H.C. Muthukrishnan, P. Nagarajan, R. Phung, C.V. Ravi, V. Simbahan, G.C. Son, T.T. Stalin, P. Tan, P.S. Thoa, V. T. K. Wang, G.H. Witt, C. |
| author_facet | Dobermann, A. Witt, C. Abdulrachman, S. Gines, H.C. Nagarajan, R. Son, T.T. Tan, P.S. Wang, G.H. Chien, N.V. Thoa, V. T. K. Phung, C.V. Stalin, P. Muthukrishnan, P. Ravi, V. Babu, M. Simbahan, G.C. Adviento, M. A. A. Bartolome, V. |
| author_sort | Dobermann, A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Nutrient supplies from indigenous sources (IS) can be estimated by measuring plant nutrient uptake in nutrient omission plots. On‐farm experiments were conducted in irrigated rice (Oryza sativa L.) domains of Asia to evaluate relationships of plant N, P, and K uptake with soil tests or grain yield measured in N, P, and K omission (0‐N, 0‐P, and 0‐K, respectively) plots and to develop guidelines for the use of omission plots in site‐specific management. Relationships between grain yield or nutrient accumulation and soil tests were scattered. Only 17% of the variation in plant N uptake in 0‐N plots was explained by total soil organic C. Extractable Olsen P explained 34% of plant P uptake in 0‐P plots, whereas 1 M ammonium acetate K showed no common relationship with plant K uptake in 0‐K plots. With good calibration, indigenous supply of N (INS), P (IPS), and K (IKS) can be estimated from grain yields in omission plots with a precision of about ±5 to 10 kg N ha−1, ±2 to 3 kg P ha−1, and ±10 to 20 kg K ha−1, respectively. Sampling requirements for estimating domain‐specific IS values depend on the homogeneity of the domain of interest. For irrigated rice domains of about 100 to 200 km2, grain yield in omission plots should be measured in at least one high‐yielding season in about 10 farms to estimate the domain mean INS, IPS, and IKS. Future research should focus on developing geospatial techniques for delineating fertilizer recommendation domains based on biophysical and socioeconomic characteristics that determine yield potential, IS, and response to fertilizer. |
| format | Journal Article |
| id | CGSpace166858 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2003 |
| publishDateRange | 2003 |
| publishDateSort | 2003 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1668582025-12-08T09:54:28Z Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice Dobermann, A. Witt, C. Abdulrachman, S. Gines, H.C. Nagarajan, R. Son, T.T. Tan, P.S. Wang, G.H. Chien, N.V. Thoa, V. T. K. Phung, C.V. Stalin, P. Muthukrishnan, P. Ravi, V. Babu, M. Simbahan, G.C. Adviento, M. A. A. Bartolome, V. plant nutrition nutrients nutrient availability nutrient uptake nutrient deficiencies nitrogen phosphorus potassium fertilizers crop yield irrigated farming precision agriculture asia Nutrient supplies from indigenous sources (IS) can be estimated by measuring plant nutrient uptake in nutrient omission plots. On‐farm experiments were conducted in irrigated rice (Oryza sativa L.) domains of Asia to evaluate relationships of plant N, P, and K uptake with soil tests or grain yield measured in N, P, and K omission (0‐N, 0‐P, and 0‐K, respectively) plots and to develop guidelines for the use of omission plots in site‐specific management. Relationships between grain yield or nutrient accumulation and soil tests were scattered. Only 17% of the variation in plant N uptake in 0‐N plots was explained by total soil organic C. Extractable Olsen P explained 34% of plant P uptake in 0‐P plots, whereas 1 M ammonium acetate K showed no common relationship with plant K uptake in 0‐K plots. With good calibration, indigenous supply of N (INS), P (IPS), and K (IKS) can be estimated from grain yields in omission plots with a precision of about ±5 to 10 kg N ha−1, ±2 to 3 kg P ha−1, and ±10 to 20 kg K ha−1, respectively. Sampling requirements for estimating domain‐specific IS values depend on the homogeneity of the domain of interest. For irrigated rice domains of about 100 to 200 km2, grain yield in omission plots should be measured in at least one high‐yielding season in about 10 farms to estimate the domain mean INS, IPS, and IKS. Future research should focus on developing geospatial techniques for delineating fertilizer recommendation domains based on biophysical and socioeconomic characteristics that determine yield potential, IS, and response to fertilizer. 2003-07 2024-12-19T12:56:44Z 2024-12-19T12:56:44Z Journal Article https://hdl.handle.net/10568/166858 en Wiley Dobermann, A.; Witt, C.; Abdulrachman, S.; Gines, H. C.; Nagarajan, R.; Son, T. T.; Tan, P. S.; Wang, G. H.; Chien, N. V.; Thoa, V. T. K.; Phung, C. V.; Stalin, P.; Muthukrishnan, P.; Ravi, V.; Babu, M.; Simbahan, G. C.; Adviento, M. A. A. and Bartolome, V. 2003. Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice. Agronomy Journal, Volume 95 no. 4 p. 924-935 |
| spellingShingle | plant nutrition nutrients nutrient availability nutrient uptake nutrient deficiencies nitrogen phosphorus potassium fertilizers crop yield irrigated farming precision agriculture asia Dobermann, A. Witt, C. Abdulrachman, S. Gines, H.C. Nagarajan, R. Son, T.T. Tan, P.S. Wang, G.H. Chien, N.V. Thoa, V. T. K. Phung, C.V. Stalin, P. Muthukrishnan, P. Ravi, V. Babu, M. Simbahan, G.C. Adviento, M. A. A. Bartolome, V. Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice |
| title | Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice |
| title_full | Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice |
| title_fullStr | Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice |
| title_full_unstemmed | Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice |
| title_short | Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice |
| title_sort | estimating indigenous nutrient supplies for site specific nutrient management in irrigated rice |
| topic | plant nutrition nutrients nutrient availability nutrient uptake nutrient deficiencies nitrogen phosphorus potassium fertilizers crop yield irrigated farming precision agriculture asia |
| url | https://hdl.handle.net/10568/166858 |
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