Abstract

Weaned lambs of the Phan Rang breed with an initial weight of 15.0 kg and 3.5 months of age were used to study the effects of feeding fresh, wilted and sun-dried cassava foliage (Manihot esculenta Crantz) on feed intake, digestibility, growth performance, HCN consumed and thiocyanate concentration in urine during 24 h. The treatments were three diets containing guinea grass (Panicum maximum) and cassava chips supplemented with fresh cassava foliage (FCFd), wilted cassava foliage (WCFd) or cassava hay (CHd). Six male lambs were used in a digestibility trial in a double 3 x 3 Latin square design and twenty-four lambs (6 males and 18 females) in a growth trial lasting 84 days. Dry matter intake ranged from 33 to 36 g/kg body weight. No significant difference between treatments was observed in live weight gain, which was 73.1, 76.7 and 75.6 g/day for FCFd, WCFd and CHd, respectively. The DM digestibility was significantly higher, 674 and 687 g/kg DM for FCFd and WCFd, compared to 600 g/kg DM for CHd. The nitrogen retained was 3.2, 3.8 and 3.5 g/day for FCFd, WCFd and CHd, respectively, and was not significantly different among treatments. Hydrogen cyanide content in fresh cassava foliage, wilted cassava foliage and cassava hay was 333.217 and 60 mg/kg DM, and the amount consumed was significantly different among treatments, 114.6, 86.6 and 25.5 mg/day for FCFd. WCFd and CHd, respectively. The thiocyanate concentration in the urine of the lambs from diet CHd was significantly lower compared to diets FCFd and WCFd. where the thiocyanate level in urine increased from before feeding, reaching a peak at 12 h after feeding and then decreasing. (C) 2010 Elsevier B.V. All rights reserved.

Keywords

Manihot esculenta Crantz; Lambs; Growth; Digestibility; HCN; Thiocyanate

Published in

Livestock Science
2010, Volume: 131, number: 2-3, pages: 155-161
Publisher: ELSEVIER SCIENCE BV

SLU Authors

• Ledin, Inger

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

• Spörndly, Eva

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

• Wredle, Ewa

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Veterinary Science
Animal and Dairy Science


Publication identifier

DOI: https://doi.org/10.1016/j.livsci.2010.03.012

Permanent link to this page (URI)

https://res.slu.se/id/publ/59874