tailieunhanh - POULTRY FOR PROFIT AND PLEASURE

Ducks have several advantages over other poultry species, in particular their disease tolerance. They are hardy, excellent foragers and easy to herd, particularly in wetlands where they tend to flock together. In Asia, most duck production is closely associated with wetland rice farming, particularly in the humid and subtropics. An added advantage is that ducks normally lay most of their eggs within the three hours after sunrise (compared with five hours for chickens). This makes it possible for ducks to freely range in the rice fields by day, while being confined by night. A disadvantage of ducks (relative to. | IFÀO Dhrersfficatfo11 lb joktet 3 Diversification booklet 3 Brian Clarke Agricultural Support Systems Division Food and Agriculture Organization of the United Nations Rome 2004 The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal or development status of any country territory city or area or of its authorities or concerning the delimitation of its frontiers or boundaries. ISBN 92-5-105075-9 All rights reserved. Reproduction and dissemination of material in this information product for educational or other non-commercial purposes are authorized without any prior written permission from the copyright holders provided the source is fully acknowledged. Reproduction of material in this information product for resale or other commercial purposes is prohibited without written permission of the copyright holders. Applications for such permission should be addressed to the Chief Publishing Management Service Information Division FAO Viale delle Terme di Caracalla 00100 Rome Italy or by e-mail to copyright@ FAO .