Detalhes bibliográficos
| Ano de defesa: |
2016 |
| Autor(a) principal: |
ALVES, Michelle Justino Gomes
 |
| Orientador(a): |
SANTOS, Carolina Etienne de Rosália e Silva |
| Banca de defesa: |
FREITAS, Ana Dolores Santiago de |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal Rural de Pernambuco
|
| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Produção Vegetal
|
| Departamento: |
Unidade Acadêmica de Serra Talhada
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Área do conhecimento CNPq: |
|
| Link de acesso: |
http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6855
|
Resumo: |
Using the inoculation has been an alternative to reduce the impacts to the environment by the use of polluting agricultural inputs, as well as reduce expenses, since these inputs are considered expensive. Cowpea (Vigna unguiculata (L.) Walp.), Is a legume that has ability to form nodules with nitrogen fixing bacteria and N2 fixation. What is very important in the study on symbiosis between these two bodies in order to produce potential inoculants effective and competitive with native bacteria. In this context, the objective of this study was to evaluate the effect of different inoculants in yield of cowpea crop, produced from isolated nodules formed under different land uses in the city of Serra Talhada, semiarid region of Pernambuco. Two experiments were conducted, one pot in full sun and others in the field, with completely randomized design. The experiment vessel was mounted in a factorial 4 x 3, four different land use systems (caatinga area preserved, fallow area, agroforestry, and area of cowpea monoculture). It used three cowpea cultivars (Sempre verde, Paulistinha and Canapu Roxo), used by local farmers, with 5 repetitions. Soil samples were collected at various points in different areas in the city of Serra Talhada, which were placed in pots with 9kg capacity, being filled with 7 kg of soil was used as bait plant for 35 days. The nodules from vessels in this experiment were ground and mixed starch gum for the production of homemade inoculant or nodules extract to be used in the field experiment. The field experiment was formed by four inoculants resulting from isolated from experimental nodules pot, treatment with nitrogen fertilization 50 kg N as urea, a treatment with inoculant with the BR 3267 strain and without inoculation control and without nitrogen fertilization, with 4 repetitions. The cultivar used in this experiment was the Paulistinha. The plants were collected and evaluated at 35 days and at the end of the crop cycle. The data were submitted to the F test and means were compared by Tukey test at 5% probability. There have been isolated effects between cultivars and different areas with different land use, as well as interaction to the characteristics number of leaves per plant, dry weight of roots, number of nodules and nodular efficiency. The cowpea cultivars showed positive responses to biological nitrogen fixation, easily nodulated in the areas of savanna preserved and agroforestry. Homemade inoculants provided increases in cowpea yields when compared to other treatments. Homemade inoculants generally provided good nodulation, dry matter production and accumulation of N in the shoot, as well as grain production, when compared to the control, the inoculant and the nitrogen treatment, meaning good responses from BNF. However, the symbiotic relationships are highly dependent on soil and climatic conditions, especially in places of research areas. This study shows the importance of knowledge of the interactions between plants and microorganisms native to each region, can the same be a germplasm source to be used in the production of inoculants. |
