BRAGA, G. J.

FERNANDES, F. D.

MALAQUIAS, J. V.

MARTINS, E. de S.

RAMOS, A. K. B.

REIS, B. R. dos

SANTOS JUNIOR, J. de D. G. dos

SOARES, J. P. G.

English

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Organic management of Brachiaria brizantha cv. Marandu pasture mixed with Stylosanthes spp. in the Cerrado.João Paulo Guimarães Soares*1, Allan Kardec Braga Ramos1, Gustavo José Braga1, Joãode Deus Gomes dos Santos Jr.1, Francisco Duarte Fernandes1, Eder de Souza Martins1, Breno Rodrigues dos Reis1, and Juaci Vitória Malaquias11Empresa Brasileira de Pesquisa Agropecuária -Embrapa Cerrados, Planaltina, DF, Brazil.The forage growth response of tropical species to alternative fertilizers legally acceptedfor organic systems still  is  unknown in the Cerrados.  The aim of this  work was toevaluate dry matter yield (DMY) and contribution of legumes in Brachiaria brizanthacv.  Marandu  pasture  intercropped  with  a  mixture  of  Stylosanthes  spp. cultivars(Mineirão, Campo Grande and Bela) exposed to organic and conventional managementduring  three  years  in  two  adjacent  areas  (Oxisol)  with  or  without  green  manure(Crotalaria juncea). The experimental design was generalized randomized blocks withthree  blocks  and  three  treatments  with  two  repetitions  per  block.  Managementtreatments were no fertilization (Control), conventional management (CM) and organicmanagement (OM) fertilization. Three months before planting it was applied 2 t ha-1 ofdolomitic limestone and 1 t ha-1 of gypsum and then green manure area was croppedusing Crotalaria juncea to guarantee the N source. At planting OM was performed withK and P sources such as thermopotassium (6% K2O) and thermophosphate (12% P2O5)in amounts of 2 t ha-1 and 1 t ha-1, respectively. For CM treatment it was used potassiumchloride (60% K2O), triple superphosphate (46% P2O5) and urea (46% N) totaling 200,260 and 217 kg ha-1, respectively. There was one harvest per season (dry and rainy) andforage was cut at 10 cm from ground level using a square of 1 m² in three points per plot(10 × 12 m). There was no difference for DMY in both seasons during the second andthird years (P > 0.05). The CMDMY was higher only in the first year for dry (3000, 1171and 1650 kg ha-1 for CM, OM and control, respectively) and rainy season (9542, 6073and 4229 kg ha for CM, OM and control respectively). The contribution of legumes inOM plots was superior (P < 0.05) than CM in the first (1805 vs. 820 kg ha-1), second(1605 vs. 441 kg ha-1) and third year (1308 vs. 506 kg ha-1). The OM plots showedlower DMY only in the first year, while in the two last year DMY was similar. TheCMDMY decreased over time, probably because of readily available nutrients in the firstyear  in  comparison  to  a  slower  nutrient  release  of  the  organic  management  of  thefertilization.  The  OM  management  provides  higher  forage  yield  and  compositionstability of grass legume mixture.Key Words: fertilizer management, forage, grass, legume, organic .International Meeting of Advances in Animal ScienceISSN: 2448-4385Vol. 1 - 2016Galoá {Este trabalho foi publicado utilizando o Galoá Proceedings

Organic management of Brachiaria brizantha cv. Marandu pasture mixed with Stylosanthes spp. in the Cerrado.

http://www.alice.cnptia.embrapa.br/bitstream/doc/1048587/1/35473.pdf

Organic management of Brachiaria brizantha cv. Marandu pasture mixed with Stylosanthes spp. in the Cerrado.

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