Li Junxia, Xing Wenhui, Gegen Tana, Zhang Chunxiang, Ren Youshe, Yang Chunhe
College of Animal Science, Shanxi Agricultural University, Taigu 030801, China.
Agriculture and Animal Husbandry Bureau of Linxi County, Linxi 025250, China.
Animals (Basel). 2023 Nov 14;13(22):3519. doi: 10.3390/ani13223519.
The objective of this study was to investigate the effects of fasted live-weight gain during the cashmere non-growing period on cashmere production performance and secondary hair follicle activity, to provide a theoretical basis for appropriate supplementary feeding of cashmere goats. Fifty Inner Mongolian cashmere goats aged 2-4 years old were randomly selected and weighed in May and September 2019, respectively. Based on fasted live-weight gain between the two weights, the experimental ewe goats were divided into two groups: 0-5.0 kg group ( = 30) and 5.0-10.0 kg group ( = 20). Skin samples and cashmere samples were collected. Results of a Pearson correlation analysis showed that fasted live-weight gain during the cashmere non-growing period had a moderate and strong positive correlation with cashmere yield ( = 0.021) and cashmere staple length ( = 0.002), respectively, but did not correlate with cashmere diameter ( = 0.254). Compared with cashmere goats with a fasted live-weight gain of 0-5.0 kg, cashmere goats with a fasted live-weight gain of 5.0-10.0 kg had a 17.10% increase in cashmere yield ( = 0.037) and an 8.09% increase in cashmere staple length ( = 0.045), but had no significant difference in cashmere diameter ( = 0.324). Results of a Pearson correlation analysis showed that there was a strong positive correlation between fasted live-weight gain and the population of active secondary hair follicles in the skin of cashmere goats ( < 0.01). Compared with cashmere goats with a fasted live-weight gain of 0-5.0 kg, cashmere goats with a fasted live-weight gain of 5.0-10.0 kg had an increase in the population of active secondary hair follicles ( < 0.05). In conclusion, the fasted live-weight gain during the cashmere non-growing period had a significant effect on secondary hair follicle activity and cashmere production performance in cashmere goats. Since fasted live-weight gain reflects nutritional level to a certain extent, this study suggests that nutritional manipulations such as supplementary feeding during cashmere non-growing periods can increase cashmere production performance. However, specific nutritional manipulations during the cashmere non-growing period need further research to increase cashmere production performance.
本研究的目的是探讨绒山羊在绒毛非生长期间空腹体重增加对羊绒生产性能和次级毛囊活性的影响，为绒山羊的合理补饲提供理论依据。随机选取50只2 - 4岁的内蒙古绒山羊，分别于2019年5月和9月称重。根据两次称重之间的空腹体重增加量，将试验母羊分为两组：0 - 5.0 kg组（n = 30）和5.0 - 10.0 kg组（n = 20）。采集皮肤样本和羊绒样本。Pearson相关性分析结果表明，绒山羊在绒毛非生长期间的空腹体重增加量分别与羊绒产量（r = 0.021）和羊绒纤维长度（r = 0.002）呈中度和强正相关，但与羊绒直径无关（r = 0.254）。与空腹体重增加量为0 - 5.0 kg的绒山羊相比，空腹体重增加量为5.0 - 10.0 kg的绒山羊羊绒产量提高了17.10%（P = 0.037），羊绒纤维长度增加了8.09%（P = 0.045），但羊绒直径无显著差异（P = 0.324）。Pearson相关性分析结果表明，空腹体重增加量与绒山羊皮肤中活跃次级毛囊数量呈强正相关（P < 0.01）。与空腹体重增加量为0 - 5.0 kg的绒山羊相比，空腹体重增加量为5.0 - 10.0 kg的绒山羊活跃次级毛囊数量增加（P < 0.05）。综上所述，绒山羊在绒毛非生长期间的空腹体重增加对次级毛囊活性和羊绒生产性能有显著影响。由于空腹体重增加在一定程度上反映了营养水平，本研究表明，在绒毛非生长期间进行补饲等营养调控措施可以提高羊绒生产性能。然而，在绒毛非生长期间具体的营养调控措施还需要进一步研究以提高羊绒生产性能。
