The vagaries in climatic changes disrupt the prevailing weather conditions leading to temperature extremes and protracted rainfall pattern which subsequently affect the quality of forages. Ruminant animals had been implicated as a major source of enteric methane production to the greenhouse effect. Grazing on this low-quality forages extends the time of fattening thereby increasing the amount of methane produced. In this case, effort has been shifted to the feeding of agroforestry plants (browse and tree species) which are available all year round with high nutritive profile. Leaves of selected agroforestry plant species Thevetia peruviana (Pers) K. Schum, Piliostigma thonningii (Schumach.) Milne-Redhead , Spondia mombin L. and Newbouldia laevis (P. Beauv.) Seem were harvested, dried, milled and analysed for their chemical constituents, mineral composition, in vitro and methane gas production. Data collected were analysed using one-way analysis of variance. Significant ( p < 0.05) differences were observed in the nutritive value of the selected plants except for dry matter and ether extract contents. NDF values ranged from 606.7 g/kg in T. peruviana to 666.7 g/kg in P. thonngii. P. thonngii recorded the highest value (533.3 g/kg) for acid detergent fibre with the lowest value (500.0 g/kg) observed in N. laevis. There were significantly ( p < 0.05) differences among the recorded mineral components of selected plants except for Mn. N. laevis had the highest volume of gas, while P. thonngii had the least. However, N. laevis had the least ( p < 0.05) insoluble fibre fraction ( b ), methane gas production with considerably highest metabolizable energy. With the appreciable level of nutrients, especially in terms of crude protein content and reduced methane production, research into various agroforestry plants will be of high interest to be adopted in ruminant diets.

中文翻译：

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选定的农林业植物作为反刍家畜旱季饲养的化学特征和体外甲烷生产

气候变化的变幻莫测扰乱了普遍的天气条件，导致极端温度和长期降雨模式，进而影响草料的质量。反刍动物被认为是温室效应肠道甲烷产生的主要来源。在这种低质量的草料上放牧会延长育肥时间，从而增加产生的甲烷量。在这种情况下，工作已转移到农林植物（灌木和树种）的饲养上，这些植物全年均可获得，具有高营养成分。收获、干燥、研磨并分析选定农林业植物品种 Thevetia peruviana (Pers) K. Schum、Piliostigma thonningii (Schumach.) Milne-Redhead、Spondia mombin L. 和 Newbouldia laevis (P. Beauv.) 的叶子成分，矿物成分、体外和甲烷气体产生。收集的数据使用单向方差分析进行分析。除了干物质和醚提取物含量外，在所选植物的营养价值中观察到显着 (p < 0.05) 差异。NDF 值范围从 T. peruviana 的 606.7 g/kg 到 P. thonngii 的 666.7 g/kg。P. thonngii 记录了酸性洗涤纤维的最高值 (533.3 g/kg)，而在 N. laevis 中观察到的最低值 (500.0 g/kg)。除 Mn 外，所选植物的记录矿物成分之间存在显着 (p < 0.05) 差异。N. laevis 的气体量最高，而 P. thonngii 的气体量最少。然而，N. laevis 具有最少（p < 0.05）的不溶性纤维部分（ b ），甲烷气体产生具有相当高的代谢能。