Effect of Varying Levels of Dietary Cation-Anion difference (DCAD) on Nutrient Digestibility and Rumen Fermentation in Deccani Lambs
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Authors
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Y.Nikitha Goud
Student
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M. Venkateswarlu
Professor & Head
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D. Nagalakshmi
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M . Hanmantha Rao
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S. Parashuramulu
Technical Manager, Chalimeda Feeds Pvt Ltd, Karimanagar, Telangana, India
Keywords:
DCAD , Deccani lamb, Digestibility, Fermentation, NutrientsAbstract
Experiment was conducted to study the different levels of dietary cation-anion differences (DCAD) on nutrient digestibilities and rumen fermentation pattern of Deccani lambs. Eighteen Deccani lambs (27.58±1.99 kg kg body weight) were selected and randomly allotted to 3 groups, containing 6 animals in each. A sorghum stover based complete ration (50R:50C) was prepared as a basal diet A sorghum stover based complete ration (50R:50C) was prepared as a basal diet. Three experimental rations viz., DCAD-160, DCAD-220 and DCAD-280 were prepared by adding sodium bicarbonate at 0.0, 0.477 and 0.955 % to the basal diet to achieve a DCAD level of 160, 220 and 280mEq/kg DM, respectively. A standard digestibility trial was conducted to assess the nutrient digestibility. At the end, rumen liquor samples were collected from all the animals to study the rumen fermentation pattern. Feeding on varying levels of DCAD had no effect on digestibility of crude protein, ether extract, crude fibre and acid detergent fibre. However, the digestibility of drymatter, organic matter, nitrogen free extract, neutral detergent fibre, hemicellulose and cellulose were lowered (P<0.05) significantly at +280 DCAD level while they were comparable in other two groups. Similarly, the percent TDN in DCAD-280 ration was significantly (P<0.01) lower than DCAD-160 or DCAD-220 rations. The rumen pH and total volatile fatty acids concentrations were comparable among the three experimental rations while, ruminal ammonia nitrogen concentration decreased significantly (P<0.01) in DCAD-280 ration. Thus it was concluded that, the sorghum stover based complete rations containing DCAD level of +220 shall be better for optimum digestibility and rumen fermentation in Deccani lambs.
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