Forage yield and nutritive value of Elephant grass, Italian ryegrass and spontaneous growing species mixed with forage peanut or red clover

The objective of this research was to evaluate of three grazing systems (GS) with elephant grass (EG), Italian ryegrass (IR) + spontaneous growing species (SGS); EG + IR + SGS + forage peanut (FP); and EG + IR + SGS + red clover (RC), during the winter and summer periods in rotational grazing with dairy cattle. Experimental design was completely randomized with three treatments, two replicates with repeated measures. Lactating Holstein cows receiving 1% BW-daily feed supplement with concentrate were used in the evaluation. Eight grazing cycles were performed during the experimental period. The values of pre forage mass and stocking rate were 2.52, 2.60 and 2.99 t ha-1 and 2.64, 2.77 and 3.14 animal unit ha-1, respectively for GS. Samples of forage were collected by hand-plucking technique to analyze the crude protein (CP), neutral detergent fiber (NDF), in situ dry matter digestibility (ISDMD), in situ organic matter digestibility (ISOMD) of forage present between rows of elephant grass, in the rows of elephant grass and the legumes. Higher value of CP, ISOMD and lower of NDF were observed for the grazing systems mixed with legumes forage

Produtividade de pastagens de Coastcross-1 em consórcio com diferentes leguminosas de ciclo hibernal

Objetivou-se com esta pesquisa avaliar três sistemas forrageiros constituídos por Coastcross-1 (CC) + 100kg de N ha-1 ano-1 + ervilhaca comum; CC + 100kg de N ha-1 ano-1 + trevo vesiculoso; e CC + 200kg de N ha-1 ano-1. Durante o período experimental (345 dias), foram realizados treze pastejos. Para avaliação, foram utilizadas vacas em lactação da raça Holandesa. Foram avaliadas a massa de forragem, composição botânica, relação folha/colmo; taxa de acúmulo diário, produção e consumo de forragem; eficiência de pastejo e taxa de lotação. Os valores médios de produção de forragem e lotação foram de 21,0; 20,3 e 24,3t ha-1; 7,0; 6,5 e 7,7 unidades animais ha-1 dia-1, para os respectivos sistemas forrageiros. Melhores resultados foram obtidos no consórcio de CC com ervilhaca e no cultivo singular de C