Effects of Dietary Tryptophan on Growth Performance, Plasma Parameters, and Internal Organs of 1–28-Day-Old Sichuan White Geese

Abstract

Although the nutrient requirements of geese during the growing stage are known, the dietary requirement of amino acids during the starting period remains unclear. Optimum nutrient supplementation during the starting period is crucial for improved survival rates, body-weight gain, and marketing weight in geese. Our study focused on the effect of dietary tryptophan (Trp) supplementation on the growth performance, plasma parameters, and internal-organ relative weights in 1-28-day-old Sichuan white geese. A total of 1080 1-day-old geese were divided randomly into six Trp-supplemented (0.145%, 0.190%, 0.235%, 0.280%, 0.325%, and 0.370%) groups. Average daily feed intake (ADFI), average daily gain (ADG), and duodenal relative weight were highest in the 0.190% group, brisket protein level and jejunal relative weight in the 0.235% group, and plasma total protein and albumin levels in the 0.325% group (P < 0.05). Dietary Trp supplementation did not significantly affect the relative weights of the spleen, thymus, liver, bursa of Fabricius, kidneys, and pancreas. Moreover, the 0.145% -0.235% groups showed significantly decreased liver fat (P < 0.05). Based on the non-linear regression analysis of ADG and ADFI, the dietary Trp levels between 0.183% and 0.190% were estimated to be optimal for 1-28-day-old Sichuan white geese. In conclusion, optimal dietary Trp supplementation in 1-28-day-old Sichuan white geese resulted in increased growth performance (0.180% -0.190%) along with improved proximal intestinal development and brisket protein deposition (0.235%). Our findings provide basic evidence and guidance for optimal levels of Trp supplementation in geese.

Comparison of growth performance, meat quality, and blood biochemical indexes of Yangzhou goose under different feeding patterns

“…In addition to conventional meat quality indicators, flavor substances such as amino acids and fatty acid content are also important criteria for evaluating meat quality. Amino acids are small molecules widely distributed in the muscles of poultry and are the main flavor substances in meat ( Fu et al, 2023 ). The Maillard reaction between amino acids and reducing sugars is the most important pathway for achieving the flavor of meat ( Sun et al, 2022 ).…”

Liver Transcriptome Profiling Identifies Key Genes Related to Lipid Metabolism in Yili Geese

“…In this study, we try to answer the reason why the Yili goose still retains its unique original growth and performance and low-fat rate. One commercial goose breed, the Sichuan white goose, is famous for its growth performance and high abdominal fat rate [6][7][8], with a significant difference compared to the Yili goose. The distinctions in the climatic environment between Xinjiang and Sichuan result in noticeable contrasts in the genetic background between Yili geese and Sichuan white geese, which may cause additional interference to research activities based in Xinjiang.…”