Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
Considering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ciência do Solo
2013-04-01
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| Series: | Revista Brasileira de Ciência do Solo |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200016&lng=en&tlng=en |
| _version_ | 1818577210091503616 |
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| author | Eduardo Mariano Paulo Cesar Ocheuze Trivelin José Marcos Leite Michele Xavier Vieira Megda Rafael Otto Henrique Coutinho Junqueira Franco |
| author_facet | Eduardo Mariano Paulo Cesar Ocheuze Trivelin José Marcos Leite Michele Xavier Vieira Megda Rafael Otto Henrique Coutinho Junqueira Franco |
| author_sort | Eduardo Mariano |
| collection | DOAJ |
| description | Considering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable N in soil. However, the technique is laborious, expensive and time-consuming. In this context, the aims of this study were to determine the amount of soil mineralizable N in the 0-60 cm layer and to evaluate the use of short-term anaerobic incubation instead of long-term aerobic incubation for the estimation of net N mineralization rates in soils under sugarcane. Five soils from areas without previous N fertilization were used in the layers 0-20, 20-40 and 40-60 cm. Soil samples were aerobically incubated at 35 ºC for 32 weeks or anaerobically incubated (waterlogged) at 40 ºC for seven days to determine the net soil N mineralization. The sand, silt and clay contents were highly correlated with the indexes used for predicting mineralizable N. The 0-40 cm layer was the best sampling depth for the estimation of soil mineralizable N, while in the 40-60 cm layer net N mineralization was low in both incubation procedures. Anaerobic incubation provided reliable estimates of mineralizable N in the soil that correlated well with the indexes obtained using aerobic incubation. The inclusion of the pre-existing NH4+-N content improved the reliability of the estimate of mineralizable N obtained using anaerobic incubation. |
| first_indexed | 2024-12-16T06:26:17Z |
| format | Article |
| id | doaj.art-91e9d57770be44889f188bd40ace097f |
| institution | Directory Open Access Journal |
| issn | 1806-9657 |
| language | English |
| last_indexed | 2024-12-16T06:26:17Z |
| publishDate | 2013-04-01 |
| publisher | Sociedade Brasileira de Ciência do Solo |
| record_format | Article |
| series | Revista Brasileira de Ciência do Solo |
| spelling | doaj.art-91e9d57770be44889f188bd40ace097f2022-12-21T22:41:00ZengSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo1806-96572013-04-0137245046110.1590/S0100-06832013000200016S0100-06832013000200016Incubation methods for assessing mineralizable nitrogen in soils under sugarcaneEduardo Mariano0Paulo Cesar Ocheuze Trivelin1José Marcos Leite2Michele Xavier Vieira Megda3Rafael Otto4Henrique Coutinho Junqueira Franco5Universidade de São PauloUniversidade de São PauloUniversidade de São PauloUniversidade de São PauloUniversidade de São PauloCentro Nacional de Pesquisa em Energia e MateriaisConsidering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable N in soil. However, the technique is laborious, expensive and time-consuming. In this context, the aims of this study were to determine the amount of soil mineralizable N in the 0-60 cm layer and to evaluate the use of short-term anaerobic incubation instead of long-term aerobic incubation for the estimation of net N mineralization rates in soils under sugarcane. Five soils from areas without previous N fertilization were used in the layers 0-20, 20-40 and 40-60 cm. Soil samples were aerobically incubated at 35 ºC for 32 weeks or anaerobically incubated (waterlogged) at 40 ºC for seven days to determine the net soil N mineralization. The sand, silt and clay contents were highly correlated with the indexes used for predicting mineralizable N. The 0-40 cm layer was the best sampling depth for the estimation of soil mineralizable N, while in the 40-60 cm layer net N mineralization was low in both incubation procedures. Anaerobic incubation provided reliable estimates of mineralizable N in the soil that correlated well with the indexes obtained using aerobic incubation. The inclusion of the pre-existing NH4+-N content improved the reliability of the estimate of mineralizable N obtained using anaerobic incubation.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200016&lng=en&tlng=enSaccharum spp.mineralização líquida de Nincubação aeróbiaincubação anaeróbia |
| spellingShingle | Eduardo Mariano Paulo Cesar Ocheuze Trivelin José Marcos Leite Michele Xavier Vieira Megda Rafael Otto Henrique Coutinho Junqueira Franco Incubation methods for assessing mineralizable nitrogen in soils under sugarcane Revista Brasileira de Ciência do Solo Saccharum spp. mineralização líquida de N incubação aeróbia incubação anaeróbia |
| title | Incubation methods for assessing mineralizable nitrogen in soils under sugarcane |
| title_full | Incubation methods for assessing mineralizable nitrogen in soils under sugarcane |
| title_fullStr | Incubation methods for assessing mineralizable nitrogen in soils under sugarcane |
| title_full_unstemmed | Incubation methods for assessing mineralizable nitrogen in soils under sugarcane |
| title_short | Incubation methods for assessing mineralizable nitrogen in soils under sugarcane |
| title_sort | incubation methods for assessing mineralizable nitrogen in soils under sugarcane |
| topic | Saccharum spp. mineralização líquida de N incubação aeróbia incubação anaeróbia |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200016&lng=en&tlng=en |
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