Banca de DEFESA: RODRIGO MODESTO JUNQUEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RODRIGO MODESTO JUNQUEIRA
DATA : 31/08/2018
HORA: 09:00
LOCAL: Auditório do CFAAO, localizado na Fazendinha Agroecológica Km 47
TÍTULO:
PALAVRAS-CHAVES:

Agroecology, sowing interval, silage, bromatological composition

PÁGINAS: 60
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Manejo e Tratos Culturais
RESUMO:

The objective of this study was to evaluate the yield and bromatological composition of forage (in natura and silage material) produced from maize and pigeon pea single crops or intercropped, in organic farming system. The experiment was carried out at Fazendinha Agoecológica - km 47 (Integrated Agroecological Production System - SIPA). The adopted experimental design was randomized blocks, with eight treatments and four replications. The treatments consisted of two species of forage plants: Maize (Zea mays cv. BRS 4154 - Eldorado) and pigeon pea (Cajanus cajan cv. BRS Mandarim) single crops, and maize + pigeon pea intercropping, being the pigeon pea planted at 0, 15, 30, 45 and 60 days before maize planting, simultaneously with maize and pigeon pea sown in the same planting line. At intercropping, the planting was done in alternate plant lines spaced by 0.50 m, resulting in a maize population equivalent to 60,000 plants.ha^-1 (6 plants per linear meter) and the pigeon pea equivalent to 100,000 plants.ha^-1 (10 plants per linear meter) whereas in single crops, the populations were equivalent to 120,000 plants and 200,000 ha ^-1 plants respectively of maize and pigeon pea. When the crops were planted simultaneously, in the same plant line, it were used the same planting density of the single crops. The cutting of forage plants to ensilage was performed at 20 cm above the soil surface. Silage materials were prepared at PVC pipes with 10 cm in diameter and 50 cm in length, with capacity for 2.5 kg of silage (600 kg m^-3). In addition to the the species yield, crude protein (CP), neutral detergent fiber (NDF) and total digestible nutrients (NDT) were evaluated. The total yield of shoot biomass reached the highest values at maize (18.12 t.ms.ha^-1) and pigeon pea (19.71 t.ms.ha^-1) single crops. At the intercropping of these species, the yield results were the same obtained at the single crops. In relation of the accumulated N total amounts in aerial part of the mixture of both species, the highest values were detected when the leguminous was sown at 45 and 60 days before sowing maize. In relation to the CP content at in natura forage, the treatment of pigeon pea single crop and intercropped pigeon pea at the different sown intervals presented the highest values than maize single crop or the intercropping with simultaneous sown of that species. Regarding silage, the highest CP levels were found in the intercropping where the leguminous was planted 45 or 60 days before maize, being 86% and 105% superior to the silage made with maize monoculture, respectively. In the evaluation of the NDF content of forage, the lowest values observed at in natura forage were related to the treatments of pigeon pea single crop and pigeon pea seeded at 45 and 60 days before maize, which provided the highest NDT values for these treatments. However, when evaluating NDF and NDT contents of silage, no significant differences were found. The treatment that combined the best values of forage production and quality, both in natura and in the form of silage, was the intercropping whose sowing of the leguminous was done at 45 days before maize

MEMBROS DA BANCA:
Presidente - 785.371.857-87 - JOSÉ GUILHERME MARINHO GUERRA - EMBRAPA
Interno - 750.960.133-91 - EDNALDO DA SILVA ARAÚJO - EMBRAPA
Externo à Instituição - ISABEL DAS NEVES OITICICA DE CARVALHO - UFRRJ