热带牧草的发酵系数、青贮饲料的发酵特性及体外降解率

Fermentability coefficient of tropical forages and fermentative profile and in vitro degradability of silages.

作者信息

Alves Wagner Sousa, de Lima Cruz Gabriel Ferreira, de Freitas Rafael Lelis, da Silveira Tamara Chagas, Coutinho Danielle Nascimento, Roseira João Paulo Santos, Teixeira Thiago Neves, Rigueira João Paulo Sampaio, Pereira Odilon Gomes, Ribeiro Karina Guimarães

机构信息

Department of Animal Science, Federal University of Viçosa, Viçosa, 36570900, Brazil.

Department of Animal Science and Technology, State University of Montes Claros, Janaúba, 39440-000, Brazil.

出版信息

Sci Rep. 2025 Aug 25;15(1):31213. doi: 10.1038/s41598-025-16231-x.

Our objective was to determine the fermentability coefficient (FC) of different tropical forages and the fermentative profile, chemical composition, and in vitro degradability of their silages. A randomised block design was used, with five treatments and four repetitions. The forage species studied were whole-plant maize (Zea mays), Cenchrus purpureus cv. BRS Capiaçu, Urochloa brizantha cv. BRS Piatã, U. decumbens cv. Basilisk, and Megathyrsus maximus cv. BRS Zuri. The FC was highest (P < 0.001) in whole-plant maize, followed by BRS Capiaçu, and lowest for BRS Piatã, Basilisk, and BRS Zuri. The fibrous fraction of the plant was higher (P < 0.001) for BRS Capiaçu and lower for whole-plant maize. The pH and ammonia content were lower (P < 0.001) for maize and BRS Capiaçu silages, and higher for BRS Zuri silage. Maize silage showed the highest effective DM digestibility (P < 0.001). The BRS Capiaçu silage exhibited a higher (P = 0.009) indigestible NDF fraction. In conclusion, if whole-plant maize cannot be produced for silage, ensiling perennial grasses, such as BRS Capiaçu, BRS Piatã, and Basilisk, is recommended due to their higher ensilability compared to BRS Zuri.

我们的目标是确定不同热带草料的发酵系数（FC）及其青贮饲料的发酵特性、化学成分和体外消化率。采用随机区组设计，有五个处理组和四个重复。所研究的草料品种有全株玉米（Zea mays）、紫狼尾草（Cenchrus purpureus cv. BRS Capiaçu）、臂形草（Urochloa brizantha cv. BRS Piatã）、俯仰臂形草（U. decumbens cv. Basilisk）和大黍（Megathyrsus maximus cv. BRS Zuri）。全株玉米的FC最高（P < 0.001），其次是BRS Capiaçu，而BRS Piatã、Basilisk和BRS Zuri的FC最低。BRS Capiaçu的植物纤维部分较高（P < 0.001），全株玉米的较低。玉米和BRS Capiaçu青贮饲料的pH值和氨含量较低（P < 0.001），BRS Zuri青贮饲料的较高。玉米青贮饲料的有效干物质消化率最高（P < 0.001）。BRS Capiaçu青贮饲料的不可消化中性洗涤纤维部分较高（P = 0.009）。总之，如果不能生产全株玉米青贮饲料，建议青贮多年生牧草，如BRS Capiaçu、BRS Piatã和Basilisk，因为它们的青贮能力比BRS Zuri更高。