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by
D.D. Dung |
Total Records (
3 ) for
D.D. Dung |
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D.D. Dung
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I.R. Godwin
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J.V. Nolan
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A hydroponic nutrient solution was used to raise barley sprouts to compare with sprouts raised using tap water irrigation (two treatments). In both treatments, the sprouts were raised in continuous light in a temperature-controlled room for a period of 7 days. There was no difference (p>0.05) in DM loss after 7 days of sprouting. The DM losses after 7 days of sprouting were 16.4 vs. 13.3% for tap water irrigation and hydroponic nutrient solution, respectively. Sprouts grown with nutrient solution had a higher protein concentration than those grown with tap water irrigation (17.3 vs. 15.9%), respectively. There was however, no difference (p>0.05) in in sacco degradation of sprouts in the rumen of Merino sheep. There was no advantage in the use of nutrient solution for producing hydroponic sprouts compared to sprouting with tap water only. If these sprouts were fed to ruminants, the DM losses would have represented a loss in digestible energy which would otherwise have been available for productive purposes. On a large scale these losses could add to the cost of animal production. |
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D.D. Dung
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I.R. Godwin
and
J.V. Nolan
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The studies reported in this research examined the nutrient profile of barley grain when it was sprouted hydroponically. Following sprouting, the measurement of animal response at experimental level and also in a commercial setting was performed in order to test the hypothesis that sprouting gives rise to hydroponic sprouts that give higher animal responses. In first part of the experiment, barley grain was sprouted hydroponically for a duration of 7 days. Daily sampling of the sprouts was done to assess DM concentration and also to determine the nutrient concentration on day 7 in comparison to the unsprouted grain. Results showed a 21.9% loss in DM from the original seed after sprouting for a period of 7 days. A loss of 2% GE was recorded after comparing the sprouts with the original grain. The CP, ash and all other minerals except potassium were lower in concentration on a DM basis in the barley grain than in the sprouts. This was considered to be a reflection of a loss in DM after sprouting causing a shift in concentration of these nutrients. The second phase of the experiment involved in sacco degradation of hydroponic barley sprouts and the unsprouted grain in the rumen of Merino sheep. There was no significant difference (p>0.05) in in sacco degradation when unsprouted grain was compared with hydroponic barley sprouts. It was concluded that the loss of 21% DM followed by a lack of difference in in sacco degradability disproved the presence of any advantage of sprouts over the original grain. |
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D.D. Dung
,
I.R. Godwin
and
J.V. Nolan
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About 4 treatments (control, fresh barley sprouts, freeze-dried barley sprouts and barley grain supplementation) were used in a latin square design. Oaten chaff basal diet was used in testing the assertion that hydroponic barley sprouts gave better animal performance than the grain supplement. Results showed increase in DM intake on supplementation, there were differences (p<0.001) among treatments in DM intake. The increased intake due to sprouts supplementation however, did not translate to better digestibility, microbial outflow and nitrogen retention. Total ammonia concentration was higher (p<0.001) for the fresh barley sprouts supplements than for the barley grain and control suggesting that poor quality roughage yields more rumen ammonia when supplemented with fresh hydroponic barley sprouts. The total ammonia concentration did not however, differ (p>0.05) between the fresh or freeze-dried hydroponic barley sprouts. The total VFA concentrations were higher for the freeze-dried and fresh hydroponic barley sprouts than the control but not different (p>0.05) from the barley grain supplementation in the current study. This suggests that sprouting did not give rise to a higher VFA concentration when poor quality roughage was supplemented. It was concluded from this study that supplementing poor quality roughage (oaten hay) with hydroponic barley sprouts increased DMI and total rumen ammonia concentration. However, there was no confirmation of the presence of a grass juice factor purported to be present in sprouts which gives increased performance. |
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