Replacement of soybean meal with alternative protein sources in the concentrate supplement for lactating Holstein × Gyr cows in an intensive tropical pasture-based system: Effects on performance, milk composition, and diurnal ingestive behavior

Impact of Using Oilseed Industry Byproducts Rich in Linoleic and Alpha-Linolenic Acid in Ruminant Nutrition on Milk Production and Milk Fatty Acid Profile

“…The findings from the initial published study by Schingoethe, et al [50] demonstrated that there were no significant alterations in either milk yield or milk fat and protein content when soybean meal was substituted for sunflower meal (SFMEAL) in the diet of dairy cows. The same findings were corroborated by others [45,49,66,67], all confirming that the partial or complete replacement of soybean meal with sunflower BPs did not adversely affect cow's milk production traits. In contrast, Yildiz, et al [68] reported a significant decrease in milk yield (−9.3%), while Pirlo, et al [46] observed a decrease in milk protein content (−2.8%).…”

“…In studies that presented the compositions of treatment diets, an increased fat content was observed in diets supplemented with BPs compared to control diets without BPs [35,36,40,41,[44][45][46]48,66,69], while lower fat content was also noted in some studies [24,37,72]. As stated, variations in the dietary and chemical composition between the control and experimental diets were commonly noted in the mentioned studies investigating the impact of dietary inclusion of oilseed BPs on milk composition.…”