Tropical Pasture Utilisation
Cambridge University Press, 30 juin 2005 - 220 pages
Recent research suggests that the application of the old concepts of pasture management developed in Europe, USA and South Africa have been unsuccessful in the Tropics; in some areas under-utilisation has resulted in poor animal output and low economic returns, whereas in other areas overgrazing has resulted in soil erosion and weeds. This book sets out to examine the problems involved in the utilisation of tropical and subtropical pastures and to explain how pastures may be managed to meet the requirements of both plants and animals for growth and replacement. Following an overview of the livestock systems of the tropics, the effects of grazing animals on the edaphic, biotic and climatic environment of the pasture are described. The response of the animals to the available pasture are discussed in terms of pasture attributes of nutritive value and sward structure, selectivity and grazing behaviour. Methods for attaining continuity of forage supply are also described. The author, Professor L. R. Humphreys, has been involved for many years in extensive research of tropical and subtropical pastures. A central objective of his work has been to effect a synchrony between pasture available and the forage requirements of the animal. This book is a culmination of much of his research and will be invaluable to all disciplines with an interest in tropical and subtropical agricultural practices.
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2 Pastures in tropical farming systems
3 Grazing and the environment for pasture growth
4 Effects of defoliation on the growth of tropical pastures
plant replacement and interference
6 The response of grazing animals to tropical pastures
7 Stocking rate and animal production
Autres éditions - Tout afficher
acid animal performance animal production atropurpureum Australian beasts botanical composition Brachiaria decumbens buming C4 grasses cattle Chloris gayana clandestinum concentration conservation continuous grazing cows crop cutting decreased decumbens deﬁciencies defoliation density digestibility dry season effects energy farm favourable feed fertiliser ﬁre fodder forage allowance gayana grassland grazing animals grazing systems ha_1 height herbage higher Humphreys increased inﬂuenced intake irrigated kg ha'1 leaf area leaf area index legume lignin litter liveweight gain maximum milk production milk yield Minson native pasture nitrogen nutrients nutritive value occurred output Panicum Panicum maximum Paspalum notatum pasture growth Pennisetum clandestinum photosynthetic plant protein Queensland Queensland lat rainfall reduced regrowth residues response rotational grazing rumen ruminants seed seedling regeneration senescence sheep shoot signiﬁcant silage Siratro soil Sorghum species sphacelata stocking rate stolons Stylosanthes guianensis supplementation sward tillers treatment trichoglume tropical grasses tropical pastures utilisation varying whilst