Agbonghae O W, Nwokoro S O
Nutritional Biochemistry Division, Department of Animal Science, Faculty of Agriculture, University of Benin, Benin City, Nigeria.
Trop Anim Health Prod. 2023 Sep 30;55(5):341. doi: 10.1007/s11250-023-03726-w.
The aim of this study was to investigate the effect of partial replacement of soybean meal with pawpaw (Carica papaya L.) leaf protein concentrate on blood and carcass characteristics of grower rabbits in Benin City, Nigeria. Five dietary treatments were formulated such that soybean meal was replaced at 0, 15, 30, 45, and 60% with pawpaw leaf protein concentrate (PLPC) on weight-for-weight basis. Twenty-five composite grower rabbits of mixed sex and approximately seven weeks of age (736 ± 90 g) were randomly allocated to five dietary treatments of five replicates in a completely randomized design. Feed and water were provided ad libitum for 12 weeks of feeding experiment. Data obtained from the study showed that white blood cells (WBC) was significantly (p < 0.05) increased by 60% PLPC inclusion. Pack cell volume (PCV), red blood cells (RBC), and haemoglobin concentration (Hgb) were not significantly (p > 0.05) affected by PLPC inclusion in the rabbit diets. However, PCV (28.90-37.43%), WBC (3.67-9.4 10/μL), and RBC (4.36-5.22 10/μL) were within the normal physiological range. Glucose and total protein concentration were significantly (p < 0.05) reduced and increased, respectively by 15% PLPC inclusion but did not follow any particular trend for higher replacement levels. Carcass measurements indicated that dressing percentage and heart, kidney, and liver weights were not significantly (p > 0.05) affected by dietary treatments. Caecum length was significantly increased (p < 0.05) by 60% PLPC inclusion. In conclusion, PLPC can be used to partially replace soybean meal without causing any adverse effect on blood and carcass characteristics of grower rabbits.
本研究的目的是调查在尼日利亚贝宁城用番木瓜（番木瓜属）叶蛋白浓缩物部分替代豆粕对生长兔血液和胴体特性的影响。配制了五种日粮处理，以重量对重量的基础，用番木瓜叶蛋白浓缩物（PLPC）分别替代0%、15%、30%、45%和60%的豆粕。将25只混合性别的、约7周龄（736±90克）的生长兔随机分配到五种日粮处理中，每个处理重复五次，采用完全随机设计。在为期12周的饲养试验中，随意提供饲料和水。研究获得的数据表明，添加60%的PLPC可使白细胞（WBC）显著（p<0.05）增加60%。兔日粮中添加PLPC对血细胞比容（PCV）、红细胞（RBC）和血红蛋白浓度（Hgb）没有显著（p>0.05）影响。然而，PCV（28.90 - 37.43%）、WBC（3.67 - 9.4×10⁶/μL）和RBC（4.36 - 5.22×10⁶/μL）均在正常生理范围内。添加15%的PLPC可使葡萄糖和总蛋白浓度分别显著（p<0.05）降低和升高，但对于更高的替代水平，未呈现任何特定趋势。胴体测量表明，日粮处理对屠宰率以及心脏、肾脏和肝脏重量没有显著（p>0.05）影响。添加60%的PLPC可使盲肠长度显著增加（p<0.05）。总之，PLPC可用于部分替代豆粕，而不会对生长兔的血液和胴体特性产生任何不利影响。
