Wang Jingjing, Tang Lizi, Wang Yongchao, Xing Yiyuan, Chen Guowu, Jiang Qian, Wang Jing, Li Enkai, Tan Bie, Ma Xiaokang
Animal Nutritional Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China.
Department of Animal Sciences, Purdue University, West Lafayette, Indiana, USA.
J Anim Physiol Anim Nutr (Berl). 2025 Jul;109(4):1062-1071. doi: 10.1111/jpn.14121. Epub 2025 Apr 13.
This experiment was conducted to investigate the effects of enzymatic hydrolysate of cottonseed protein (EHCP) replacing soybean meal on growth performance, nutrient digestibility, blood indexes and fecal volatile fatty acid concentrations of weaned piglets. Thirty 'Duroc × Landrace × Yorkshire' 28-day-old weaned piglets (male) with an initial body weight of 8.29 ± 0.76 kg were randomly divided into 3 treatment groups with 10 replicates per treatment and 1 pig per replicate. The control group was fed a corn-soybean meal basal diet, and the experimental groups were fed the basal diet supplemented with 2% 65%EHCP and 1.3% 85%EHCP to replace soybean meal, respectively. The experiment period was 21 days. Compared with the control group, the final body weight, average daily gain and average daily feed intake in 65%EHCP group and 85%EHCP group were significantly increased (p < 0.05); both the 65%EHCP and 85%EHCP groups exhibited significantly higher digestibility of energy and crude fat compared to the control group (p < 0.05). Notably, the energy digestibility in the 85%EHCP group was also significantly greater than that in the 65%EHCP group (p < 0.05). When compared to the control group, the blood urea nitrogen concentration was significantly lower in both the 65%EHCP and the 85%EHCP groups (p < 0.01). The concentrations of alanine, aspartic acid, glutamic acid, and tyrosine in serum were significantly higher in the 65%EHCP and 85%EHCP groups compared to the control group (p < 0.05). Additionally, in the 85%EHCP group, the concentrations of methionine and threonine in serum were significantly increased when compared to both the control group and the 65%EHCP group (p < 0.05). On the other hand, valine levels in the 65%EHCP group were significantly higher than in the 85%EHCP group (p < 0.05). Compared with the control group, fecal acetic acid, propionic acid, butyric acid and total volatile fatty acid concentration in the 65%EHCP group and 85%EHCP group were significantly increased (p < 0.01). In conclusion, dietary supplementation of EHCP can improve growth performance, nutrient digestibility, blood indexes and volatile fatty acids concentrations in feces of weaned piglets. This study suggests that EHCP can effectively substitute common soybean meal in the diets of weaned piglets and serves as a theoretical basis for its use in pig feeding practices.
本试验旨在研究棉籽蛋白酶解物（EHCP）替代豆粕对断奶仔猪生长性能、养分消化率、血液指标及粪便挥发性脂肪酸浓度的影响。选用30头28日龄、初始体重8.29±0.76 kg的“杜洛克×长白×大白”雄性断奶仔猪，随机分为3个处理组，每组10个重复，每个重复1头猪。对照组饲喂玉米-豆粕基础日粮，试验组分别饲喂添加2% 65%EHCP和1.3% 85%EHCP替代豆粕的基础日粮。试验期为21天。与对照组相比，65%EHCP组和85%EHCP组的末体重、平均日增重和平均日采食量均显著提高（p＜0.05）；65%EHCP组和85%EHCP组的能量和粗脂肪消化率均显著高于对照组（p＜0.05）。值得注意的是，85%EHCP组的能量消化率也显著高于65%EHCP组（p＜0.05）。与对照组相比，65%EHCP组和85%EHCP组的血液尿素氮浓度均显著降低（p＜0.01）。65%EHCP组和85%EHCP组血清中丙氨酸、天冬氨酸、谷氨酸和酪氨酸的浓度均显著高于对照组（p＜0.05）。此外，85%EHCP组血清中蛋氨酸和苏氨酸的浓度与对照组和65%EHCP组相比均显著升高（p＜0.05）。另一方面，65%EHCP组缬氨酸水平显著高于85%EHCP组（p＜0.05）。与对照组相比，65%EHCP组和85%EHCP组粪便中乙酸、丙酸、丁酸和总挥发性脂肪酸浓度均显著升高（p＜0.01）。综上所述，日粮中添加EHCP可提高断奶仔猪的生长性能、养分消化率、血液指标及粪便挥发性脂肪酸浓度。本研究表明，EHCP可有效替代断奶仔猪日粮中的普通豆粕，为其在养猪生产中的应用提供了理论依据。
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