Effect of sulfur fertilization on chemical composition, ensiling characteristics, and utilization by lambs of sorghum silage
| Autor: | J. P. Fontenot, M. R. Ahmad, V. G. Allen, G. W. Hawkins |
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| Rok vydání: | 1995 |
| Předmět: |
Male
Silage Nitrogen Iron chemistry.chemical_element Forage Lignin Blood Urea Nitrogen chemistry.chemical_compound Animal science Human fertilization Polysaccharides Genetics Animals Hemicellulose Magnesium Blood urea nitrogen Sheep biology Chemistry General Medicine Hydrogen-Ion Concentration Sorghum biology.organism_classification Sulfur Agronomy Food Fortified Urea Potassium Animal Science and Zoology Calcium Digestion Edible Grain Copper Food Science |
| Zdroj: | Journal of animal science. 73(6) |
| ISSN: | 0021-8812 |
| Popis: | Effects of S fertilization, 0 or 138 kg of S/ha, as (NH 4 ) 2 SO 4 on chemical composition, ensiling characteristics, and utilization of sorghum ( Sorghum bicolor L.) silage by wether lambs was investigated. 'Pioneer 947' sorghum forage was ensiled at the soft dough growth stage. Sulfur fertilization increased ( P < .01) concentrations of S, N, K, Mn, and water-soluble carbohydrates (WSC) and decreased (P < .05) concentrations of Fe, Cu, Al, and acetic acid after ensiling. Sulfur-fertilized sorghum silage (N :S = 12) and non-S fertilized silage (N :S = 15) were fed alone and supplemented with urea to achieve 14% CP (N :S = 18 and 23, respectively) to 24 crossbred (1/2 Dorset, 1/4 Finn, 1/4 Rambouillet) wether lambs in a metabolism trial. Sulfur fertilization decreased apparent lignin digestibility and increased apparent digestibilities of DM, NDF, and hemicellulose (P < .05), apparent absorption and retention of S, N, P, K, Mg, and Mn ( P < .01), and apparent absorption of Ca ( P < .05). Apparent absorption and retention of Cu and Al were lower (P < .05) in lambs fed the S-fertilized silages. Digestibilities of DM and NDF were increased by N-supplementation in the non S-fertilized silage ( N x S interaction, P < .05). Nitrogen supplementation increased ( P < .01) blood urea nitrogen and apparent absorption and retention of N. Results indicate that S fertilization enhanced forage quality primarily due to increased TNC concentration, digestibility of hemicellulose, and N utilization by lambs but could exacerbate Cu deficiency where Cu levels are marginal. |
| Databáze: | OpenAIRE |
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