Protein,energy and mineral utilization in rats fed rice-legume diets |
| |
Authors: | Carmen M Donangelo Birthe Pedersen Dr B O Eggum |
| |
Institution: | (1) Department of Animal Physiology and Biochemistry, National Institute of Animal Science, 25 Rolighedsvej, DK-1958 Frederiksberg C, Denmark;(2) Department of Biotechnology, Carlsberg Research Center, 10 Gamle Carlsberg Vej, DK-2500 Valby, Denmark;(3) Present address: Instituto de Nutricão, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21910 Rio de Janeiro, Brazil |
| |
Abstract: | Protein, energy and mineral utilization were examined in growing rats fed cooked, dry legume seeds in combination with polished rice. The legumes tested included 3 varieties of common beans, black, white and brown (Phaseolus vulgaris), lentils (Lens esculenta) and peas (Pisum sativum). The rice:legume mixtures (1:1 N ratio) were the only dietary sources of protein, Zn, Fe and Cu. The rice:black bean mixture was also tested at a 4:1 N ratio. Nutrient utilization was studied by balance trials and mineral utilization was further assessed by tissue analyses. True protein digestibility (TD) and energy digestibility of the rice:legume (1:1) mixtures were high. Biological value (BV) varied only little but was lowest in the rice:lentil mixture. The rice:brown bean mixture had the lowest amount of utilizable protein (UP). The (1:1) rice:legume mixtures did not adversely affect Fe status, as measured by liver Fe content and blood hemoglobin and hematocrit, or Cu status, as measured by liver Cu content and plasma ceruloplasmin. However, femur zinc content indicated a sub-optimal Zn status. Increasing the dietary N from rice in combination with black beans resulted in a substantial improvement of BV, NPU and Zn status of the animals but had a negative effect on UP and Fe status of the rats. |
| |
Keywords: | rice legume mixtures utilization of protein energy zinc iron and copper |
本文献已被 SpringerLink 等数据库收录! |
|