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Summary of our research
Mie University, Aichi Prefectural Agricultural College, and Kankyo Tekushisu Co., Ltd. collaborated to investigate the effects of partially replacing imported corn, which is commonly used as dairy cow feed, with by-products from Castella cake.
These by-products, such as trimmings generated during the manufacturing process, account for about 10% of the total Castella production.
Despite being manufacturing by-products, they are rich in sugars and starches, suggesting promising potential for effective use.
In this study, dairy cows were fed Castella by-products, and the digestibility of nutrients, milk yield, and milk components were thoroughly evaluated.
The results revealed that even when Castella by-products were used instead of corn, there were no differences in milk yield or composition, and furthermore, the digestibility of certain nutrients, such as fiber, actually improved. Effective utilization of food by-products is expected to help reduce both feed costs and food waste.
The research was published in the international journal "Animal Science Journal" on July 22, 2025.
https://onlinelibrary.wiley.com/doi/10.1111/asj.70086
【Aichi Prefectural Agricultural College】
Researcher information
MAKOTO Kondo
Graduate School of Bioresources Associate Professor
Specialized area：
Animal Feed Science, Ruminant Nutrition
Current research field：
・Estimation of starch digestibility in dairy and beef cattle
・Nutritional evaluation of food by-products as ruminant feeds