Subsoil nitrogen dynamics in Amazonian forest successions.
In this study we were mesuring mineral and total soil N to a depth of 8 m in secondary forest and under two primary forest species in three replicates, in Manaus-AM (Brasil). The results show low amounts of nitrate underneath the secondary forest to a depth of 2 m, whereas the nitrate contents under the two primary forest sites were high at 1 m - 2 m depth. Below 2 m depth, it was reversed and the mineral soil N was higher under the secondary forest than the primary forest. The N mineralization showed the same trend indicating that a large portion of the N is leached in its organic form.
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| Main Authors: | , , |
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| Other Authors: | |
| Format: | Parte de livro biblioteca |
| Language: | English eng |
| Published: |
2000-12-04
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| Subjects: | Brasil, Amazonas, Manaus., Floresta Tropical Úmida, Lixiviação, Latossolo Amarelo, Nitrogênio, Solo., Ferralsols, leaching, nitrogen, tropical rain forests., |
| Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/670036 |
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| Summary: | In this study we were mesuring mineral and total soil N to a depth of 8 m in secondary forest and under two primary forest species in three replicates, in Manaus-AM (Brasil). The results show low amounts of nitrate underneath the secondary forest to a depth of 2 m, whereas the nitrate contents under the two primary forest sites were high at 1 m - 2 m depth. Below 2 m depth, it was reversed and the mineral soil N was higher under the secondary forest than the primary forest. The N mineralization showed the same trend indicating that a large portion of the N is leached in its organic form. |
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