Abstract
Simple SummaryIn China, and even the world, the animal husbandry industry is facing the problem of a shortage of feed ingredients, and even humans and animals compete for food. The development of unconventional feed resources is an urgent task. In our previous work, we analyzed the nutritional value of tea powder and believed that it has development potential. This study investigated the effects of supplementing different levels of tea powder in diets on pig growth performance, meat quality, and antioxidant properties. These results provide a preliminary basis for the application of tea powder as a supplement in animal husbandry.This study was conducted to evaluate the effects of tea powder in diets on the growth performance, meat quality, muscular amino acid, fatty acid profile, and serum biochemical indices of pigs. A total of 120 local Chinese pigs (Tibetan × Bama miniature pigs) were randomly assigned to five treatment groups, each with six pens and four pigs per pen. During a 60-day experiment, these groups of pigs were fed the normal diet and the diet supplemented with 1%, 2%, 4%, and 6% tea powder, respectively. The results showed that the supplementation of tea powder did not affect the growth performance of pigs. However, the dietary tea powder inclusion decreased (p < 0.05) the average fat thickness, total fat, and abdominal fat, and increased (p < 0.05) the total muscle as well. In addition, the dietary 2% tea powder decreased (p < 0.05) the muscle lightness (L*) and yellowness (b*). Compared with the control group, the dietary supplementation with 1%, 2%, and 4% tea powder raised (p < 0.05) the total amino acids (TAA) and essential amino acids (EAA), and dietary 4% and 6% tea powder increased (p < 0.05) the C20:5n3 in the muscle tissue. Furthermore, the serum lipid metabolism-related biochemical indices and mRNA expression levels were improved with the addition of tea powder. These results indicated that dietary tea powder might improve the carcass traits and meat quality of the Chinese native finishing pigs, but it does not affect their growth performance. Tea powder could be fully developed and reasonably applied as a dietary supplement.
Highlights
With the continuous improvement of people’s quality of life, the consumer demand has changed
The 2% tea group showed an increase (p < 0.05) in the average daily feed intake (ADFI) compared with the 6% tea group, but no significant difference was observed between the control and treatment groups
The results of this study indicated that, when the dietary tea powder was supplemented at 4% or more, the content of the C20:5n3 showed a significant improvement compared with the control group, improving the nutritional value of the meat
Summary
With the continuous improvement of people’s quality of life, the consumer demand has changed. The market needs to provide higher quality meat to meet the consumer demand. At the same time, improving the quality of meat products through nutritional adjustments or changing feed ingredients is one of the hotspots in animal nutrition research [1]. Tea has widely spread and rapidly become one of the most popular plant-based beverages around the world because of its rich nutrition and unique taste. In the process of tea production and processing, more than 20% of waste tea (tea stalks and broken leaves with no commercial value) will be produced, which is not for human consumption.
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