Aspectos de la nutrición nitrogenada de Paspalum notatum Flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación.
A greenhouse experiment was made to study the effects of NH4 or NO3 (single vs, split, 3x) application on growth and nitrogen (N) assimilation of Paspalum nota-turn Fhi,gge Light and temperature conditions over the experimental period (20 days) had a more pronounced effect on seasonal patterns of dr...
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Instituto Interamericano de Cooperación para la Agricultura (IICA)
2022
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| Acceso en línea: | https://repositorio.catie.ac.cr/handle/11554/12056 |
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RepoCATIE120562022-10-07T16:47:49Z Aspectos de la nutrición nitrogenada de Paspalum notatum Flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación. Some aspects of the nitrogen nutrition of Paspalum notatum Flugge, as related to N-carried and nitrification inhibition. Santana Bendix, M.E Silvestre Fernández, M Pereyra Rossiello, R.O. PASPALUM NOTATUM PASPALUM NOTATUM Sede Central A greenhouse experiment was made to study the effects of NH4 or NO3 (single vs, split, 3x) application on growth and nitrogen (N) assimilation of Paspalum nota-turn Fhi,gge Light and temperature conditions over the experimental period (20 days) had a more pronounced effect on seasonal patterns of dry matter accumulation than either N-carrier or application procedures. Nitrate-reductase activity was higher for plants that received NO3 in split applications, and lower for plants under NH4 in a single application. Amides were not detected in the soluble-N pool NO3 accumulated most in the roots of Paspalum, while the rhizomes showed higher accumulation of amino-N. The highest free-N levels (NO3-N + amino-N) were found in roots plus rhizomes: 73%, 70%, 76%and 57%of the total free-N, for NO3 (single), NO3 (split), NH4 (single) and NH4 (split) applica-tions, respectively. Protein-N however, accumulated most (62%, 57%, 56% and 65% of total Protein-N respectively, for the 4 treatments) in leaves. A negative relationship was found between total free-N and total dry weight (r = 0.984*) and leaf-free-N and total dry weight (r = 0.978*) of the plants. The data also indicate that the split application of N-SERVE (nitrification inhibitor) was more effective than the sole application. The highest free-N (NO3-N + amino-N) in roots plus rhizomes suggests that these organs could act as buffer zones, by keeping excess NH4 or NO3 from reaching the shoots, thus avoiding disturbances in the N-metabolism in the leaves. 2022-10-06T17:42:28Z 2022-10-06T17:42:28Z 1982-01 Artículo https://repositorio.catie.ac.cr/handle/11554/12056 openAccess es Turrialba; Vol. 32, no. 1 10 páginas application/pdf Instituto Interamericano de Cooperación para la Agricultura (IICA) |
| institution |
Centro Agronómico Tropical de Investigación y Enseñanza |
| collection |
Repositorio CATIE |
| language |
Español |
| topic |
PASPALUM NOTATUM PASPALUM NOTATUM Sede Central |
| spellingShingle |
PASPALUM NOTATUM PASPALUM NOTATUM Sede Central Santana Bendix, M.E Silvestre Fernández, M Pereyra Rossiello, R.O. Aspectos de la nutrición nitrogenada de Paspalum notatum Flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación. |
| description |
A greenhouse experiment was made to study the effects of NH4 or NO3 (single vs, split, 3x) application on growth and nitrogen (N) assimilation of Paspalum nota-turn Fhi,gge Light and temperature conditions over the experimental period (20 days) had a more pronounced effect on seasonal patterns of dry matter accumulation than either N-carrier or application procedures.
Nitrate-reductase activity was higher for plants that received NO3 in split applications, and lower for plants under NH4 in a single application. Amides were not detected in the soluble-N pool NO3 accumulated most in the roots of Paspalum, while the rhizomes showed higher accumulation of amino-N. The highest free-N levels (NO3-N + amino-N) were found in roots plus rhizomes: 73%, 70%, 76%and 57%of the total free-N, for NO3 (single), NO3 (split), NH4 (single) and NH4 (split) applica-tions, respectively. Protein-N however, accumulated most (62%, 57%, 56% and 65% of total Protein-N respectively, for the 4 treatments) in leaves. A negative relationship was found between total free-N and total dry weight (r = 0.984*) and leaf-free-N and total dry weight (r = 0.978*) of the plants. The data also indicate that the split application of N-SERVE (nitrification inhibitor) was more effective than the sole application.
The highest free-N (NO3-N + amino-N) in roots plus rhizomes suggests that these organs could act as buffer zones, by keeping excess NH4 or NO3 from reaching the shoots, thus avoiding disturbances in the N-metabolism in the leaves. |
| format |
Artículo |
| author |
Santana Bendix, M.E Silvestre Fernández, M Pereyra Rossiello, R.O. |
| author_facet |
Santana Bendix, M.E Silvestre Fernández, M Pereyra Rossiello, R.O. |
| author_sort |
Santana Bendix, M.E |
| title |
Aspectos de la nutrición nitrogenada de Paspalum notatum Flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación. |
| title_short |
Aspectos de la nutrición nitrogenada de Paspalum notatum Flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación. |
| title_full |
Aspectos de la nutrición nitrogenada de Paspalum notatum Flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación. |
| title_fullStr |
Aspectos de la nutrición nitrogenada de Paspalum notatum Flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación. |
| title_full_unstemmed |
Aspectos de la nutrición nitrogenada de Paspalum notatum Flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación. |
| title_sort |
aspectos de la nutrición nitrogenada de paspalum notatum flugge, en respuesta a fuentes de nitrógeno e inhibición de nitrificación. |
| publisher |
Instituto Interamericano de Cooperación para la Agricultura (IICA) |
| publishDate |
2022 |
| url |
https://repositorio.catie.ac.cr/handle/11554/12056 |
| work_keys_str_mv |
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