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Chemical composition, nutritive value and voluntary intake of tropical tree foliage and cocoyam in pigs
Author(s) -
Leterme Pascal,
Londoño Angela M,
Estrada Fernando,
Souffrant Wolfgang B,
Buldgen André
Publication year - 2005
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2177
Subject(s) - dry matter , meal , composition (language) , limiting , zoology , potassium , biological value , nutrient , chemistry , food science , biology , mechanical engineering , linguistics , philosophy , organic chemistry , engineering
The composition of the leaves of cocoyam ( Xanthosoma sagittifolium ) and of two trees ( Trichanthera gigantea and mulberry, Morus alba ), their nutritive value in pigs and voluntary intake by pigs were determined. The average protein content ranged from 170 to 240 g kg −1 dry matter (DM) and that of neutral detergent fibres from 218 to 398 g kg −1 DM. The leaves are interesting sources of calcium (up to 69 g kg −1 DM), potassium, iron and manganese. The proteins are well balanced in essential amino acids, with lysine ranging from 43 to 57 g kg −1 proteins. The apparent faecal digestibility was determined by difference in 35 kg pigs fed a diet containing 35% leaf meal. The digestibility coefficients of DM, N and energy were, respectively, 47–57, 33–36 and 51–53%. The digestible energy value ranged from 1.674 to 2.037 kcal kg −1 DM. The voluntary intake of Trichanthera and Xanthosoma was measured in sows weighing 100 kg on average. The intake reached 3.4 kg fresh leaves day −1 (0.51 kg DM) and 1.0–1.1 kg dry leaf meal/day. It is concluded that low energy density is the main limiting factor of tree foliage for pig nutrition but that they are good sources of minerals and well‐balanced proteins. Copyright © 2005 Society of Chemical Industry