Residual and leached nitrogen in soil plant zeolite systems
The N use efficiency in agroecosystems is considered low mainly because of N losses by processes such as nitrate leaching. These losses could be mitigated by incorporating natural zeolites to the N fertilizer formulations. The main objective of this study was to evaluate the effect of natural zeolit...
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| Lenguaje: | Español |
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| Acceso en línea: | http://ri.agro.uba.ar/files/download/articulo/2011Civeira.pdf LINK AL EDITOR |
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| 100 | 1 | |a Civeira, Gabriela |9 12594 | |
| 245 | 0 | 0 | |a Residual and leached nitrogen in soil plant zeolite systems |
| 246 | 0 | 0 | |a Nitrógeno residual y lixiviado del fertilizante en el sistema suelo - planta - zeolitas |
| 520 | |a The N use efficiency in agroecosystems is considered low mainly because of N losses by processes such as nitrate leaching. These losses could be mitigated by incorporating natural zeolites to the N fertilizer formulations. The main objective of this study was to evaluate the effect of natural zeolites additions to formulations with N fertilizers on the contents of residual N and leached N in a soil under maize crop. The hypothesis of this study was that zeolite addition to N fertilizer could reduce the residual and leached N levels but could also affect the plant N availability. A greenhouse experiment was conducted under controlled conditions from February to April 2009. Corn was planted [Zea mays L.] in pots which were maintained at field capacity. Zeolite and nitrogen fertilizer [Urea [[NH2]2CO], solid granules, 46-0-0] were added together as a dry physical mixture, at the beginning of the experiment. The treatments were T: control, Z1: 120 kg ha-1 zeolite, Z2: 200 kg ha-1 zeolite, N: 200 kg N ha-1, NZ1: 120 kg ha-1 zeolite + 200 kg N ha-1, NZ2: 200 kg ha-1 zeolite + 200 kg N ha-1. At the maize silking [R1 stage,] soil samples were taken to determine the residual N [NO3-N and N-NH4] and plant samples were obtained to measure dry matter [DM] and N absorbed by the plant. The N use efficiency [NUE] was also evaluated in each treatment. Finally, a forced leaching was applied in all treatments. The results showed that the application of N fertilizer with lower rates of zeolites [NZ1] significantly increased the N absorbed by maize, dry matter and NUE compared to the N treatment. These results can be explained by the favourable effect of the zeolites on nitrogen mineralization and soil water retention. The higher absorbed N levels in NZ1 corresponded with a significant residual N decrease compared to the N treatment while the leached N remained the same. Nevertheless, when the applied zeolites rate was higher [NZ2], the absorbed N by maize was similar to the N treatment while the leached N increased significantly compared to the N and NZ1 treatments, thus showing a late release of N to the soil solution. These results suggest that the synchronization between the pattern of N release from the soil-fertilizer-zeolite system and the N absorption by maize depended on the zeolite rate. While in NZ1 such synchronization improved the performance of the nitrogen fertilizer, in the NZ2 treatment the retained N by the zeolites was not available to maize, being detected as leached N at the end of the experiment. | ||
| 653 | 0 | |a NATURAL ZEOLITES | |
| 653 | 0 | |a NITRATE LEACHING | |
| 653 | 0 | |a NITROGEN USE EFFICIENCY | |
| 653 | 0 | |a RESIDUAL NITRATE | |
| 653 | 0 | |a DRY MATTER | |
| 653 | 0 | |a FERTILIZER | |
| 653 | 0 | |a LEACHING | |
| 653 | 0 | |a MAIZE | |
| 653 | 0 | |a MINERALIZATION | |
| 653 | 0 | |a NITRATE | |
| 653 | 0 | |a NITROGEN | |
| 653 | 0 | |a SOIL WATER | |
| 653 | 0 | |a ZEOLITE | |
| 653 | 0 | |a ZEA MAYS | |
| 700 | 1 | |9 7468 |a Rodríguez, Mónica Beatriz | |
| 773 | |t Ciencia del Suelo : revista de la Asociación Argentina de la Ciencia del Suelo |g Vol.29, no.2 (2011), p.285-294 | ||
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| 900 | |a ^tResidual and leached nitrogen in soil plant zeolite systems | ||
| 900 | |a ^tNitrógeno residual y lixiviado del fertilizante en el sistema suelo-planta-zeolitas | ||
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| 900 | |a ^aRodríguez^bM. B. | ||
| 900 | |a ^aCiveira, G.^tInstituto de Suelos, INTA Castelar, De los Reseros y las Cabañas s/n, Buenos Aires, Argentina | ||
| 900 | |a ^aRodríguez, M.B.^tCátedra Fertilidad y Fertilizantes, Facultad de Agronomía-Universidad de Buenos Aires, Av. San Martín 4453 [1407], Buenos Aires, Argentina | ||
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| 900 | |a Vol. 29, no. 2 | ||
| 900 | |a 294 | ||
| 900 | |a NATURAL ZEOLITES | ||
| 900 | |a NITRATE LEACHING | ||
| 900 | |a NITROGEN USE EFFICIENCY | ||
| 900 | |a RESIDUAL NITRATE | ||
| 900 | |a DRY MATTER | ||
| 900 | |a FERTILIZER | ||
| 900 | |a LEACHING | ||
| 900 | |a MAIZE | ||
| 900 | |a MINERALIZATION | ||
| 900 | |a NITRATE | ||
| 900 | |a NITROGEN | ||
| 900 | |a SOIL WATER | ||
| 900 | |a ZEOLITE | ||
| 900 | |a ZEA MAYS | ||
| 900 | |a The N use efficiency in agroecosystems is considered low mainly because of N losses by processes such as nitrate leaching. These losses could be mitigated by incorporating natural zeolites to the N fertilizer formulations. The main objective of this study was to evaluate the effect of natural zeolites additions to formulations with N fertilizers on the contents of residual N and leached N in a soil under maize crop. The hypothesis of this study was that zeolite addition to N fertilizer could reduce the residual and leached N levels but could also affect the plant N availability. A greenhouse experiment was conducted under controlled conditions from February to April 2009. Corn was planted [Zea mays L.] in pots which were maintained at field capacity. Zeolite and nitrogen fertilizer [Urea [[NH2]2CO], solid granules, 46-0-0] were added together as a dry physical mixture, at the beginning of the experiment. The treatments were T: control, Z1: 120 kg ha-1 zeolite, Z2: 200 kg ha-1 zeolite, N: 200 kg N ha-1, NZ1: 120 kg ha-1 zeolite + 200 kg N ha-1, NZ2: 200 kg ha-1 zeolite + 200 kg N ha-1. At the maize silking [R1 stage,] soil samples were taken to determine the residual N [NO3-N and N-NH4] and plant samples were obtained to measure dry matter [DM] and N absorbed by the plant. The N use efficiency [NUE] was also evaluated in each treatment. Finally, a forced leaching was applied in all treatments. The results showed that the application of N fertilizer with lower rates of zeolites [NZ1] significantly increased the N absorbed by maize, dry matter and NUE compared to the N treatment. These results can be explained by the favourable effect of the zeolites on nitrogen mineralization and soil water retention. The higher absorbed N levels in NZ1 corresponded with a significant residual N decrease compared to the N treatment while the leached N remained the same. Nevertheless, when the applied zeolites rate was higher [NZ2], the absorbed N by maize was similar to the N treatment while the leached N increased significantly compared to the N and NZ1 treatments, thus showing a late release of N to the soil solution. These results suggest that the synchronization between the pattern of N release from the soil-fertilizer-zeolite system and the N absorption by maize depended on the zeolite rate. While in NZ1 such synchronization improved the performance of the nitrogen fertilizer, in the NZ2 treatment the retained N by the zeolites was not available to maize, being detected as leached N at the end of the experiment. | ||
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