Ramos, Danielle Braule Pinto and Souza, Luiz Augusto Gomes de (2013) Seleção de estirpes de rizóbios para formação de mudas de leucena (Leucaena leucocephala (Lam) De Wit.) em Argissolo Vermelho Amarelo. [Selection of Rhizobia strains for development seedlings of leucaena (Leucaena leucocephala (Lam) De Wit.) in Red-Yellow Ultisol.] Revista Brasileira de Agroecologia, 8 (1), pp. 28-39.
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Document available online at: http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/article/view/10377
Summary
O estudo objetivou avaliar a resposta à inoculação e selecionar estirpes eficientes na fixação simbiótica de N2 em mudas de leucena em Argissolo Vermelho Amarelo, sob enviveiramento. Foi avaliada a inoculação individual de 12 estirpes de rizóbios homólogos da coleção do INPA, um tratamento controle e um que recebeu N-mineral (ureia, 80 kg ha-1). O delineamento foi inteiramente casualizado, com oito repetições. Aos 74 dias, as melhores estirpes foram INPA 935 e 936 que favoreceram o desenvolvimento da biomassa das mudas e a estirpe INPA 897 que apresentou alta capacidade infectiva, avaliada pelo número de nódulos formados. Duas outras estirpes também apresentam potencial para novos testes como inoculante, as estirpes INPA 899 e 937. As plantas inoculadas com INPA 935 produziram biomassa seca da parte aérea 30,8 e 45,0 % maior, que os tratamentos testemunha e com nitrogênio. A taxa de nodulação das mudas foi de 98,6 % (n=112). As taxas de nitrogênio foliar foram elevadas, com média de 43,6 g kg-1, com concentração média de N nas folhas de 4,4 %.
Summary translation
The study aimed at to evaluate the answer to the inoculation and to select efficient strains in the symbiotic fixation of N2 in leucena seedlings in Yellow Red Ultisol, under nursery. The individual inoculation of 12 strains of rhizobia homologous of the collection of INPA, a treatment was evaluated it controls and one that received N-mineral (urea, 80 kg ha-1). The design was random entirely, with 8 repetitions. After 74 days in nursery, the best strains were INPA 935 and 936 that favored the development of the biomass of the seedlings and the strain INPA 897 with high capacity infective showed for high nodule number formed. Two other strains also present potential for new tests as inoculant: INPA 899 and 937. The plants inoculated with INPA 935 produced dry biomass of the aerial biomass 30,8 and 45,0 % larger, that the treatments witness and with N. The rate of nodulation of the seedlings was of 98,6 % (n=112). The rates of foliar nitrogen they were high, with average of 43,6 g kg-1, with medium concentration of N in the leaves of 4,4 %.
| EPrint Type: | Journal paper |
|---|---|
| Keywords: | Fixação de nitrogênio, Leguminosas arbóreas, Microbiologia do solo. Nitrogen fixation, Legume tree, Soil microbiology. |
| Agrovoc keywords: | Language Value URI English agroecology http://aims.fao.org/aos/agrovoc/c_92381 English Nitrogen fixation http://aims.fao.org/aos/agrovoc/c_5196 English Legumes http://aims.fao.org/aos/agrovoc/c_4255 English Soil microorganisms http://aims.fao.org/aos/agrovoc/c_36167 English Microbiology http://aims.fao.org/aos/agrovoc/c_4800 |
| Subjects: | Farming Systems Soil > Soil quality > Soil biology Soil |
| Research affiliation: | Brazil > Other organizations |
| ISSN: | 1980-9735 |
| Related Links: | http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/index |
| Deposited By: | Pinto, Gabriela Franco |
| ID Code: | 24482 |
| Deposited On: | 04 Feb 2014 12:35 |
| Last Modified: | 04 Feb 2014 12:35 |
| Document Language: | Portuguese/Portugues |
| Status: | Published |
| Refereed: | Peer-reviewed and accepted |
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