Effect of feeding neutralized urea-treated rice straw on milk production of crossbred holstein cows
1994
Somkid Promma | Tasaki, I. | Boonlom Cheva-Isarakul (National Dairy Training and Applied Research Inst., Chiang Mai (Thailand))
Response of crossbred Holstein milking cows to the neutralized urea-treated rice straw feeding was investigated. Rice straw was treated with 6 % urea for at least 21 days and further with sulfuric acid for overnight to complete the neutralization process. The neutralized straw was then sun-dried and its feeding value was compared with that of the dried non-neutralized urea-treated straw. They were fed to the cows with concentrates either by ration formulation based on the nutrient requirements for milk production recommended by NRC or by traditional way in which straw was fed adlibitum and concentrates at 1 kg/2 kg of milk production. The results showed that milk production as well as milk composition of cows were not different between neutralized and non-neutralized straw. The feeding of the neutralized straw could significantly reduce the supply of protein-rich feed such as soybean oil meal, and it was demonstrated that ammonium sulfate in the neutralized straw could be utilized as effective as the plant origin protein. The results also suggested that if the traditional feeding was applied to the dairy cattle, protein content of the supplementing concentrates should be increased to meet the requirement.
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