Abatan Oluwayemisi, Oni Adebayo Olusoji, Adebayo Kolawole, Iposu Shamusideen, Sowande Olusiji Sunday, Onwuka Chryss Friday Ijeoma
Department of Animal Nutrition, Federal University of Agriculture, PMB 2240, Abeokuta, Nigeria.
Trop Anim Health Prod. 2015 Jan;47(1):123-9. doi: 10.1007/s11250-014-0695-1. Epub 2014 Oct 7.
A 16-week experiment was conducted to determine the utilization of ratios of cassava leaf meal, cassava peel and cowpea haulms by West African Dwarf (WAD) goats. Thirty WAD bucks aged 8 ± 1.3 months with body weights of 6-6.5 ± 0.12 kg were divided into five groups of six animals and each group randomly assigned to one of the treatments in a completely randomized design. The five dietary treatments were formulated to contain cassava peels, leaves and cowpea haulms at different proportions of 700:100:175 (T1), 500:200:275 (T2), 300:300:375 (T3) and 100:400:475 (T4) g/kg dry matter (DM), respectively. A standard diet formulated to meet the nutrient requirement of the animals with no cassava and cowpea haulms was used as the control diet (T5). DM intake ranged from 316.16 to 458.73 g/day and significantly increased (linear (L), quadratic (Q), cubic (C): P < 0.05) as the inclusion of cassava peels reduced and cassava leaves and cowpea haulms increased in the diets. The crude protein (CP) intake significantly increased (L, Q, C: P < 0.05) as the inclusion of cassava peels reduced and cassava leaves and cowpea haulms increased in the diets. Growth rate values significantly (L: P < 0.05; Q: P < 0.01) ranged from 21.55 g/day in T1 to 43.09 g/day in T4. The feed conversion ratio was significantly (L, Q: P <0.01) lowest in T4 (11.35) and was highest in animals in T5 (14.33). Dry matter digestibility significantly (L, Q, C: P < 0.05) ranged from 78.94 to 89.52 %. The digestibility increased as the inclusion of cassava leaves and cowpea haulms increased and reduced cassava peels in the diets. The highest N intake of 14.75 g/day obtained in T4 was significantly (L: P < 0.01; Q, C: P < 0.05) different from the values of 9.26, 10.56, 11.31 and 12.02 in T1, T2, T3 and T5, respectively. Nitrogen balance values significantly (L, Q, C: P < 0.05) ranged from 2.75 g/day in T1 to 9.15 g/day in T4. It is recommended that cassava peels, leaves and cowpea haulms in the proportion of 100:400:475 g/kg DM improved the growth and digestibility of WAD goats and can therefore be used to sustain animal performance during the dry season in a total mixed ration.
进行了一项为期16周的试验，以测定西非矮山羊对木薯叶粉、木薯皮和豇豆秸秆的利用率。选用30只8±1.3月龄、体重6 - 6.5±0.12千克的西非矮山羊公羊，随机分为5组，每组6只，采用完全随机设计，每组分别给予一种处理日粮。5种日粮处理分别按木薯皮、木薯叶和豇豆秸秆不同比例700:100:175（T1）、500:200:275（T2）、300:300:375（T3）和100:400:475（T4）克/千克干物质（DM）配制。以不含木薯和豇豆秸秆、满足动物营养需求的标准日粮作为对照日粮（T5）。干物质采食量范围为316.16至458.73克/天，随着日粮中木薯皮含量减少、木薯叶和豇豆秸秆含量增加，干物质采食量显著增加（线性（L）、二次曲线（Q）、三次曲线（C）：P＜0.05）。随着日粮中木薯皮含量减少、木薯叶和豇豆秸秆含量增加，粗蛋白（CP）采食量显著增加（L、Q、C：P＜0.05）。生长速率值显著不同（L：P＜0.05；Q：P＜0.01），范围从T1组的21.55克/天到T4组的43.09克/天。饲料转化率在T4组显著最低（11.35）（L、Q：P＜0.01），在T5组动物中最高（14.33）。干物质消化率显著不同（L、Q、C：P＜0.05），范围为78.94%至89.52%。随着日粮中木薯叶和豇豆秸秆含量增加、木薯皮含量减少，消化率提高。T4组获得的最高氮摄入量为14.75克/天，与T1、T2、T3和T5组分别为9.26、10.56、11.31和12.02克/天的值显著不同（L：P＜0.01；Q、C：P＜0.05）。氮平衡值显著不同（L、Q、C：P＜0.05），范围从T1组的2.75克/天到T4组的9.15克/天。建议按100:400:475克/千克DM的比例使用木薯皮、木薯叶和豇豆秸秆，可提高西非矮山羊的生长性能和消化率，因此可用于在旱季以全混合日粮维持动物生产性能。
