Cassava as livestock feed in Africa

Table of Contents

Proceedings of the IITA/ILCA/University of Ibadan Workshop on the Potential Utilization of Cassava as Livestock Feed in Africa

14-18 November 1988
Ibadan, Nigeria

S.K. Hahn, L. Reynolds and G.N. Egbunike

International Institute of Tropical Agriculture
Ibadan, Nigeria
International Livestock Centre for Africa
Addis Ababa, Ethiopia

About IITA

The goal of the International Institute of Tropical Agriculture (IITA) is to increase the productivity of key food crops and to develop sustainable agricultural systems that can replace bush fallow, or slash-and-burn, cultivation in the humid and subhumid tropics. Crop improvement programs focus on cassava, maize, plantain, cowpea, soybean, and yam. Research findings are shared through international cooperation programs, which include training, information, and germplasm exchange activities.

IITA was founded in 1967. The Federal Government of Nigeria provided a land grant of 1,000 hectares at Ibadan, for a headquarters and experimental farm site, and the Rockefeller and Ford foundations provided financial support. IITA is governed by an international Board of Trustees. The staff includes around 180 scientists and professionals from about 40 countries, who work at the Ibadan campus and at selected locations in many countries of sub-Saharan Africa.

IITA is one of the nonprofit, international agricultural research centers currently supported by the Consultative Group on International Agricultural Research (CGIAR). Established in 1971. CGIAR is an association of about 50 countries, international and regional organizations, and private foundations. The World Bank, the Food and Agriculture Organization of the United Nations (FAO), and the United Nations Development Programme (UNDP) are cosponsors of this effort.

© 1992
International Institute of Tropical Agriculture

Oyo Road, PMB 5320, Ibadan, Nigeria
Telephone: (234-22) 400300-400318
Telex: 31417 or 31159 TROPIB NG
Fax (INMARSAT): 874-1772276

ISBN 978 131 072 3

This electronic document has been scanned using optical character recognition (OCR) software and careful manual recorrection. Even if the quality of digitalisation is high, the FAO declines all responsibility for any discrepancies that may exist between the present document and its original printed version.

Table of Contents



I. Introduction

II. Utilization of cassava

Cassava in African farming and food systems: Implications for use in livestock feeds

Cassava in food crop and livestock production systems
Cassava in food systems during crisis
Importance of cassava in future food systems
Implications for cassava use in livestock feed

An overview of traditional processing and utilization of cassava in Africa

Why cassava needs processing
Constraints in the traditional processing of cassava
Traditional methods for processing cassava
Processing techniques and reduction of cyanide in cassava
Processed products
Processing equipment
Storage of processed products
Cassava leaves as vegetable
Utilization of processed products
Modes of consumption
Potentials of cassava as animal feed
The future of cassava

Utilization of cassava in nonruminant livestock feeds

Agronomic and nutritional potentials of cassava
Utilization of cassava in poultry feeding
Utilization of cassava in swine feeding
Future perspective

A review of ruminant responses to cassava-based diets

Response of ruminants fed on cassava and its by-products
Nutrient content of cassava
Utilization of cassava products and by-products by ruminants
By-products of cassava tuberous root processing
Constraints to widespread utilization of cassava products
Future research needs

Effect of protein deficiency on utilization cassava peel by growing pigs

Materials and methods

The use of cassava feeding rabbits

Cassava root meal
Cassava peel meal
Cassava leaf meal
Effect of processing on feeding value of cassava

The potential of cassava peel for feeding goats in Nigeria

Materials and methods
Results and discussion

III. Varietal improvement of cassava

Cassava varietal improvement for processing and utilization in livestock feeds

Quantitative biology of cassava varieties suitable for livestock feeds
Biochemical aspects of cassava utilization for livestock
Low cyanide cassava varieties

The adoption of improved cassava varieties and their potential as livestock feeds in southwestern Nigeria

Cassava varieties in southwestern Nigeria
Level of adoption of improved cassava varieties in southwestern Nigeria
The sociology of cassava adoption and spread
Cassava as a livestock feed resource
The economies of cassava as a livestock feed resource

IV. Processing of cassava

Processing cassava for animal feeds

Processing of cassava into chips and pellets
Artificial dryers
Processing of cassava leaves and stems
Production of single cell protein from cassava

Constraints and projections for processing and utilization of Cassava

Mechanized processes of cassava detoxification
Utilization of detoxified cassava in poultry feeds

V. Cassava utilization in selected countries

The use of cassava broiler diets in Côte d'Ivoire: Effects on growth performance and feed costs

Materials and methods
Results and discussion

Evaluation of cassava energy source in dairy cow concentrate feeds in Kenya

Materials and methods

Processing and utilization of cassava livestock feed in Tanzania

Cassava production in Tanzania
Cassava processing in Tanzania
Cassava-based diets for pigs
Cassava-based diets for poultry
Cassava a feed source for ruminants
Present and potential roles of cassava as a livestock feed
Why cassava is not widely used for livestock feeding

Cassava production and utilization in Liberia

Production and processing
Cassava as animal feed

VI. Reports of working groups and workshop recommendations

Reports of working groups

Report of working group A
Report of working group B
Report of working group C

Workshop summary and recommendations

Summary of workshop

List of participants