Year: 2015 | Month: April | Volume 5 | Issue 1
Effect of Feeding Formaldehyde Treated Rapeseed and Cottonseed Cakes on Milk Yield and Composition at Various Stages of Lactation and Parity in Jersey Cows
Abstract:
The aim of this study was to document the response of lactating Jersey cows to feeding of formaldehyde treated oil cakes of rapeseed and cottonseed on milk yield and composition at various stages of lactation and parity. Formaldehyde treatment of oil cakes was performed at 1% of crude protein, and these treated cakes were used in preparing treatment concentrate mixture. The experiment was carried out for 40 days using 27 lactating Jersey cows differing in parity 1-3, 4-6 and ≥7 with different stages of lactation i.e. early (1-3 m), mid (4-6 m) and late (7-9 m) in each lactation groups. The animals were grouped into Control and Treatment. For first 10 days, cows of Control group were offered with a control concentrate and thereafter same animals were grouped as Treatment group and fed the same concentrate having both the protein meals treated with formaldehyde, along with ad libitum access to barley green fodder and wheat straw. The milk yield and its component yield were decreased linearly as lactation advanced and the differences were significant (P<0.05) between early and late lactation. The highest increment (P<0.05) in milk yield was noted in early lactation (0.69 kg/d) and least during late lactation (0.56 kg/d). Milk SNF yield was improved (P<0.05) up to the tune of 40 g/d in mid lactation cows only. With respect to parity, the highest (P<0.05) milk yield was observed in 1st-3rd parity and lowest after 7th parity, while milk fat% followed the reverse trend upon feeding formaldehyde treated oil cakes, while other parameters like fat and SNF percentage did not differ due to treatment. Furthermore, milk fat yield was increased (P<0.05) to the extent of 50 g/d and 20 g/d in 1st-3rd and above 7th parity cows, respectively. It was concluded that feeding of concentrate mixture containing formaldehyde treated oil cakes (rapeseed and cottonseed) economically improved yield of milk and milk components. Furthermore, the treatment effect was more pronounced during early lactation and in lower (1-3) parity Jersey cows.
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