de Almeida Daniel Mageste, Marcondes Marcos Inácio, Rennó Luciana Navajas, Martins Leandro Soares, Villadiego Faider Alberto Castaño, Paulino Mário Fonseca
Department of Animal Science, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil.
Department of Veterinary Medicine, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil.
Trop Anim Health Prod. 2018 Dec;50(8):1843-1849. doi: 10.1007/s11250-018-1630-7. Epub 2018 Jun 6.
The research aimed to evaluate the effect of replacing soybean meal with soybean grain on the nutritional parameters and productivity of heifers grazing on Urochloa decumbens in the rainy-dry transition period. Forty crossbred heifers with the initial age and weight of 18 months and 292 ± 6.1 kg, respectively, were used. The experimental design was a completely randomized design, with five treatments and eight replications. The evaluated treatments were as follows: SM-supply of 0.5 kg/animal/day of soybean meal supplement; SG-supply of 0.5 kg/animal/day of soybean grain supplement; SM-supply of 1.0 kg/animal/day of soybean meal supplement; SG-supply of 1.0 kg/animal/day of soybean grain supplement; MM-only mineral mix ad libitum. The supplement was isoprotein with 350 g of crude protein/kg of dry matter. Supplementation improved the performance of the heifers and this fact can be verified by the higher average daily gain (ADG) and final BW (fBW) of the supplemented animals (P < 0.10). The two supplemented treatments with 1 kg/day demonstrated similar performance (P > 0.10), the same happens for the two treatments receiving 0.5 kg/day (P > 0.10). However, animals receiving 1 kg/day of supplementation had an ADG and final BW higher than animals receiving 0.5 kg/day (P < 0.10). Supplementation (P < 0.10) affected the intake of dry matter (DM), organic matter, crude protein, ether extract, non-fiber carbohydrates, total digestible nutrients, and neutral detergent fiber corrected for ash and protein (apNDF). Supplementation improved DM digestibility and all constituents of the diet (P < 0.10), except for apNDF (P > 0.10). In summary, it is concluded that multiple supplementations improve the performance of grazing heifers in the rainy-dry transition period and the total replacement of soybean meal by soybean grain does not alter the performance of the animals.
本研究旨在评估在雨旱过渡时期，用大豆籽粒替代豆粕对放牧于俯仰臂形草上的小母牛营养参数和生产性能的影响。使用了40头杂交小母牛，初始年龄和体重分别为18个月和292±6.1千克。试验设计为完全随机设计，有5种处理和8次重复。评估的处理如下：SM——每天每头动物供应0.5千克豆粕补充料；SG——每天每头动物供应0.5千克大豆籽粒补充料；SM——每天每头动物供应1.0千克豆粕补充料；SG——每天每头动物供应1.0千克大豆籽粒补充料；MM——仅自由采食矿物质混合料。补充料为等蛋白，每千克干物质含350克粗蛋白。补充料提高了小母牛的生产性能，这一事实可通过补充组动物较高的平均日增重（ADG）和最终体重（fBW）得到验证（P<0.10）。两种每天供应1千克的补充处理表现相似（P>0.10），两种每天供应0.5千克的处理也是如此（P>0.10）。然而，每天接受1千克补充料的动物的ADG和最终体重高于每天接受0.5千克补充料的动物（P<0.10）。补充料（P<0.10）影响干物质（DM）、有机物、粗蛋白、乙醚提取物、非纤维碳水化合物、总可消化养分以及校正灰分和蛋白质后的中性洗涤纤维（apNDF）的摄入量。补充料提高了DM消化率和日粮的所有成分（P<0.10），但apNDF除外（P>0.10）。总之，得出的结论是，多次补充提高了雨旱过渡时期放牧小母牛的生产性能，并且用大豆籽粒完全替代豆粕不会改变动物的生产性能。
