Nutritional Evaluation of Lentil (Lens culinaris) Straw and Urea Treated Wheat Straw in Goats and Lactating Buffaloes

Abstract

The nutritive value of lentil straw (Lens culinaris) relative to 4% urea treated wheat straw (w/w) was assessed in adult bucks and milking buffaloes on-station and on-farm, respectively. A digestion-cum-nitrogen balance experiment was conducted with three bucks (24.35 kg) fed ad libitum lentil straw (LS), urea treated wheat straw (UTS) and a 1:1 (w/w DM basis) mixture of LS and UTS (LS:UTS) in a 3×3 Latin square design. Though daily dry matter intake (g kg W 0.75 or % LW) of bucks fed LS and UTS did not differ significantly, that of LS:UTS was significantly (p<0.05) low. Similarly, digestibility of nutrients (DM, OM and CP) and nitrogen balance (g/day) did not differ significantly for bucks given LS or UTS although a significant positive improvement was evident in these parameters for LS:UTS. The digestibility of fibre fractions (NDF and ADF) was significantly (p<0.05) lower in LS as compared to UTS or LS:UTS. Except for the significantly (p<0.05) lower intake of DCP (g kgW 0.75 ), the bucks fed LS had statistically similar nutrient intake as compared to UTS. Feeding of LS:UTS resulted in significantly higher nutrient (DCP, TDN) intake by bucks. The important blood-biochemical parameters (haemoglobin,packed cell volume, glucose, urea nitrogen, total protein) and activity of serum enzymes (alanine aminotransferase and aspartate aminotransferase) did not differ significantly in goats irrespective of dietary treatment. In the on- farm study, eighteen multiparous milking buffaloes were randomly assigned into three equal groups to assess the relative effect of feeding untreated wheat straw (WS), UTS and LS:UTS ad libitum as basal feed with a supplement. The study continued for 3 months and revealed that daily dry matter intake and average milk production (liters/day) by buffaloes offered LS:UTS and UTS was statistically similar but it was significantly higher compare to WS. However, milk composition did not differ significantly among the dietary treatments. It may be concluded that the nutritive value of lentil straw appeared to be no different to UTS, however, a positive synergistic effect was evident by feeding a mixture of LS and UTS on performance of goats and lactating buffaloes. (Asian-Aust. J. Anim. Sci. 2004. Vol 17, No. 11 : 1529-1534)