Selim Abu Sadeque Md, Hasan Md Nazimul, Rahman Md Abdur, Rahman Md Morshedur, Islam Md Rashidul, Bostami A B M Rubayet, Islam Shilpi, Tedeschi Luis Orlindo
Department of Animal Science and Nutrition, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706, Bangladesh.
Department of Dairy and poultry Science, BSMRAU, Gazipur-1706, Bangladesh.
Heliyon. 2022 May 18;8(5):e09496. doi: 10.1016/j.heliyon.2022.e09496. eCollection 2022 May.
This study aimed to evaluate six unconventional feed resources of Bangladesh, including water hyacinth (), banana leaves (), roadside grass (), bamboo leaves ( Scrad), Seaweed ( sp.) and sugarcane bagasse (). Evaluations were based on dry matter (DM), crude protein (CP), crude fiber (CF), neutral detergent fiber (NDF), acid detergent fiber (ADF), ether extract (EE), ash content, DM and OM digestibilities and fractional rate of degradation. Two conventional feeds, i.e., rice bran and german grass, were used as the positive control. Samples (400 mg) were incubated with rumen liquor in an fermentation chamber at 0, 6, 12, 24, 48, 72, and 96 h for the degradation kinetic studies. The CP contents of 10.13, 10.63, 10.21, and 8.49 % were found in seaweed, banana leaf, water hyacinth, and bamboo leaf, respectively. The NDF values ranged between 16.5 and 75.6% and ADF varied from 9.7 to 58.8% in this study. The highest value of NDF (75.6%) and ADF (58.8%) were found in sugar cane bagasse and the lowest value of NDF (16.5%) and ADF (9.7%) were as observed in seaweed. However, higher DM degradation (33.5-42.8%) was found in seaweed during the incubation periods of 24-96 h. A significant (P < 0.05) increased of OM degradation (44.9%) compared to other feed resources was also observed in seaweed at 96 h of incubation. Water hyacinth, banana leaves, german grass, and sugarcane bagasse had greater DM digestibility (32.9-36.3%) compared to roadside grass, bamboo leaves, and rice bran (24.8-29.1%). The higher total OM digestibility of seaweed found (>44.9%) can be associated with the presence of large quantities of fraction b (>39.2 %), resulting in moderate amounts of undegradable fraction (U) (57.2 %). This study provides a comparative estimate of ruminal DM and OM degradation characteristics for seaweed and some other unconventional feed resources, which might be helpful for their inclusion in the diet according to the ruminally undegraded to degraded DM and OM intake ratio.
本研究旨在评估孟加拉国的六种非常规饲料资源，包括水葫芦、香蕉叶、路边草、竹叶、海藻和甘蔗渣。评估基于干物质（DM）、粗蛋白（CP）、粗纤维（CF）、中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）、乙醚提取物（EE）、灰分含量、DM和OM消化率以及降解率。两种常规饲料，即米糠和象草，用作阳性对照。将样品（400毫克）与瘤胃液在发酵室中于0、6、12、24、48、72和96小时进行孵育，以进行降解动力学研究。海藻、香蕉叶、水葫芦和竹叶中的CP含量分别为10.13%、10.63%、10.21%和8.49%。本研究中，NDF值在16.5%至75.6%之间，ADF在9.7%至58.8%之间变化。甘蔗渣中NDF（75.6%）和ADF（58.8%）的值最高，海藻中NDF（16.5%）和ADF（9.7%）的值最低。然而，在24至96小时的孵育期内，海藻中的DM降解率较高（33.5 - 42.8%）。在96小时孵育时，与其他饲料资源相比，海藻中的OM降解率也显著（P < 0.05）提高（44.9%）。与路边草、竹叶和米糠（24.8 - 29.1%）相比，水葫芦、香蕉叶、象草和甘蔗渣的DM消化率更高（32.9 - 36.3%）。发现海藻具有较高的总OM消化率（>44.9%），这可能与大量b级分（>39.2%）的存在有关，导致不可降解部分（U）的量适中（57.2%）。本研究提供了海藻和其他一些非常规饲料资源瘤胃DM和OM降解特性的比较估计，这可能有助于根据瘤胃未降解与降解的DM和OM摄入比例将它们纳入日粮中。
