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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Rhizobial inoculation and molybdenum fertilization in peanut crops grown in a no tillage system after 20 years of pasture.
Autores:  CRUSCIOL, C. A. C.
FERRARI NETO, J.
MUI, T. S.
FRANZLUEBBERS, A. J.
COSTA, C. H. M. DA
CASTRO, G. S. A.
RIBEIRO, L. C.
COSTA, N. R.
Data:  2019-04-09
Ano:  2019
Palavras-chave:  Symbiotic fixation
Nitrogenase activity
Arachis hypogaea subsp. hypogaea
Urochloa brizantha
Nodulation
Resumo:  Peanut (Arachis hypogea) is an important legume grain consumed by humans and utilized for effective nutrient cycling in a diverse cropping system. Areas that have been cultivated with perennial pasture for decades may have nutritional deficiencies and lack a sufficient population of atmospheric nitrogen-fixing bacteria. Molybdenum is an essential micronutrient that is part of the enzyme nitrogenase contained within symbiotic Bradyrhizobium bacteria, which are responsible for fixing nitrogen in legumes. Our objective was to evaluate the effects of application of Mo at different rates and a rhizobial inoculant on peanut growth characteristics. The experiment was conducted in the 2009/2010 growing season in a no-tillage cropping system following 20-year use as pasture [Urochloa brizantha (Syn. Brachiaria brizantha)]. The experimental design was a randomized complete block with four replicates. The main plots were characterized by peanut inoculation with Bradyrhizobium inoculant or without, and the split plots were characterized by different rates of molybdenum (0, 50, 100, and 200 g ha-1) applied to leaves in the form of ammonium molybdate. The nutritional status of plants, nodulation (number of nodules and nodule dry matter per plant), nitrogenase activity, and nitrogenase specific activity were evaluated at 45 and 64 days after emergence (DAE). The yield components and kernel yield were evaluated at the end of the growing season. Nitrogenase enzyme activity at 64 DAE approximately doubled, and the number of pods per plant was greater with inoculation than without, both of which led to greater yields of pods and kernels. In long-term pasture areas, inoculation and molybdenum fertilization greater than the currently recommended rate appear to be necessary to increase pod and kernel yield per hectare of peanut when managed under no-tillage.

bitstream/item/195665/1/5048.pdf
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Português
Identificador:  5048

http://www.alice.cnptia.embrapa.br/alice/handle/doc/1108077

http://dx.doi.org/10.1590/18069657rbcs20170399
Editor:  Revista Brasileira de Ciência do Solo, v. 43, p. e0170399, 2019.
Relação:  Embrapa Territorial - Artigo em periódico indexado (ALICE)
Formato:  19 p.
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