Directory UMM :Data Elmu:jurnal:A:Animal Feed Science and Technology:Vol83.Issue3-4.Mar2000:
Animal Feed Science and Technology
83 (2000) 223±235
Effect of replacing soybean protein with cassava
leaf protein in cassava root meal based diets for
growing pigs on digestibility and N retention
Bui Huy Nhu Phuca, B. Ogleb, J.E. Lindbergb,*
a
University of Agriculture and Forestry, Department of Animal Nutrition, Thu Duc,
Ho Chi Minh City, Viet Nam
b
Swedish University of Agricultural Sciences, Department of Animal Nutrition and Management,
P.O. Box 7024, S-750 07 Uppsala, Sweden
Received 16 April 1999; received in revised form 20 September 1999; accepted 18 November 1999
Abstract
The nutrient and HCN contents of cassava leaves from six varieties of cassava growing in south
Viet Nam were analysed and three balance experiments were performed with growing pigs to
evaluate the digestibility and nitrogen utilisation of cassava root meal based diets with increasing
levels of replacement of the protein from soybean meal (SBM) by the protein of cassava leaves. In
Experiment 1 cassava leaf meal (CLM) replaced SBM in the proportions 0, 0.35, 0.70 and 1.00 of
the crude protein (CP); in Experiment 2 ensiled cassava leaves (ECL) replaced SBM in the
proportions 0, 0.15, 0.30 and 0.45 of CP and in Experiment 3 CLM replaced SBM in the
proportions 0, 0.15, 0.30 and 0.45 of the CP.
The CP contents of the cassava leaves ranged from 240 to 350 g/kg, and the crude ®bre (CF)
contents from 100 to 150 g/kg on a dry matter (DM) basis. The HCN content was markedly reduced
by both sun-drying and ensiling, with the reduction being higher after sun-drying.
The apparent digestibilities of organic matter (OM), CP, ether extract and CF decreased linearly
(P
83 (2000) 223±235
Effect of replacing soybean protein with cassava
leaf protein in cassava root meal based diets for
growing pigs on digestibility and N retention
Bui Huy Nhu Phuca, B. Ogleb, J.E. Lindbergb,*
a
University of Agriculture and Forestry, Department of Animal Nutrition, Thu Duc,
Ho Chi Minh City, Viet Nam
b
Swedish University of Agricultural Sciences, Department of Animal Nutrition and Management,
P.O. Box 7024, S-750 07 Uppsala, Sweden
Received 16 April 1999; received in revised form 20 September 1999; accepted 18 November 1999
Abstract
The nutrient and HCN contents of cassava leaves from six varieties of cassava growing in south
Viet Nam were analysed and three balance experiments were performed with growing pigs to
evaluate the digestibility and nitrogen utilisation of cassava root meal based diets with increasing
levels of replacement of the protein from soybean meal (SBM) by the protein of cassava leaves. In
Experiment 1 cassava leaf meal (CLM) replaced SBM in the proportions 0, 0.35, 0.70 and 1.00 of
the crude protein (CP); in Experiment 2 ensiled cassava leaves (ECL) replaced SBM in the
proportions 0, 0.15, 0.30 and 0.45 of CP and in Experiment 3 CLM replaced SBM in the
proportions 0, 0.15, 0.30 and 0.45 of the CP.
The CP contents of the cassava leaves ranged from 240 to 350 g/kg, and the crude ®bre (CF)
contents from 100 to 150 g/kg on a dry matter (DM) basis. The HCN content was markedly reduced
by both sun-drying and ensiling, with the reduction being higher after sun-drying.
The apparent digestibilities of organic matter (OM), CP, ether extract and CF decreased linearly
(P