Effect of crude glycerin in goat ration on composition and qualities changes of sterilized goat milk during storage
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Abstract
Studying on effect of crude glycerin (CG) in goat ration on feed intake, milk composition and qualities of goat milk product were investigated. Twelve 75% crossbred Saanen dairy goats (BW 49+3.0 kg) with 60+12 days in milk were randomly assigned to a completely randomized design to evaluate the effect of 3 dietary crude glycerin (CG) levels in concentrate i.e. 0, 5 and 10% on feed intake, milk composition and some qualities changes of sterilized goat milk during storage. The goats were offered the treatment concentrate at a ratio to milk yield at 1:2. Ruzi grass was given on an ad libitum basis as roughage. The results revealed that total DM intake and milk composition were similar among treatments, except for 5% of CG, milk fat, and total solid were higher (P < 0.05) than other treatments, whereas lactose increased (P > 0.05) as increasing CG levels in concentrate. Storing sterilized goat milk for 3 months found changes of color, sediment and oxidation in CG treated group slightly higher than the control. Concluding of this study was supplementing 5% CG in concentrate obtained the highest major components of milk. Sterilized goat milk products still had quality conforming to the regulation of milk product in Thai Industrial Standard (TIS 738-2530) when 5-10% CG were supplemented in goat ration.
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ปิ่นจันจุฬา, พัชรินทร์ ภักดีฉนวน และสุธา วัฒนสิทธ์. 2557ข. สมรรถภาพการผลิตและลักษณะทางซากของแพะขุนที่ได้รับกลีเซอรีนดิบในอาหารผสมเสร็จ. แก่นเกษตร. 42: 509-520.
สำนักงานมาตรฐานผลิตภัณฑ์อุตสาหกรรม. 2530. มาตรฐานผลิตภัณฑ์อุตสาหกรรมนมสด มอก.738-2530. กระทรวงอุตสาหกรรม, กรุงเทพฯ.
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