Wanapat Metha, Foiklang Suban, Phesatcha Kampanat, Paoinn Chainarong, Ampapon Thiwakorn, Norrapoke Thitima, Kang Sungchhang
Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand.
Animal Science and Technology, Maejo University, Chiang Mai, 50290, Thailand.
Trop Anim Health Prod. 2017 Apr;49(4):829-833. doi: 10.1007/s11250-017-1268-x. Epub 2017 Mar 15.
The objective of this study was to investigate the effect of tropical legume (Phaseolus calcaratus) mixed with ruzi grass feeding on the performance of lactating dairy cows. Eighty-eight lactating dairy cows from 22 smallholder dairy farms northeast of Thailand were assigned to respective dietary treatments according to a Randomized Completely Block Design (RCBD). Four cows were selected from each farm and were allocated into two different feeding groups as follows: ruzi grass and P. calcaratus mixed with ruzi grass (1:1 ratio), respectively. All cows were fed with roughage ad libitum with 1:2 ratio of concentrate diet to milk yield. The results revealed that total dry matter intake, ruminal volatile fatty acids, and ammonia nitrogen concentration were enhanced when cows were fed with P. calcaratus mixed with ruzi grass (P < 0.05). Moreover, feeding tropical legume mixed with ruzi grass could increase milk production and milk protein in this study. Importantly, an economical assessment showed that milk income and the profit from milk sale were significantly greater in cows fed the mixture of roughage than those from the non-mixed group. This study concluded that high-quality roughage as tropical legume mixed with ruzi grass at the ratio of 1:1 brought out the remarkable and practical implementation for smallholder dairy farms, and the intervention was practical and deserving of more on-farm intervention.
本研究的目的是调查热带豆科植物（距瓣豆）与鲁芝草混合饲喂对泌乳奶牛生产性能的影响。根据随机完全区组设计（RCBD），将来自泰国东北部22个小农户奶牛场的88头泌乳奶牛分配到各自的日粮处理组。从每个农场挑选4头奶牛，并将它们分配到两个不同的饲养组，如下所示：分别为鲁芝草组和距瓣豆与鲁芝草混合组（比例为1:1）。所有奶牛自由采食粗饲料，精料日粮与产奶量的比例为1:2。结果显示，当奶牛饲喂距瓣豆与鲁芝草的混合物时，总干物质摄入量、瘤胃挥发性脂肪酸和氨氮浓度均有所提高（P < 0.05）。此外，在本研究中，饲喂热带豆科植物与鲁芝草的混合物可以提高牛奶产量和乳蛋白含量。重要的是，经济评估表明，饲喂粗饲料混合物的奶牛的牛奶收入和牛奶销售利润显著高于未混合组。本研究得出结论，以1:1比例混合热带豆科植物与鲁芝草的优质粗饲料对小农户奶牛场具有显著且切实可行的实施效果，该干预措施切实可行，值得在农场进行更多干预。
