Effects Of Complete Pellets With Different Nutritional Level On Fattening Lambs

An experiment was conducted by using otal of 27 crossbred lambs(3 .5- 4months) of Poll Dorest( ) X Tibetan sheep(-) to investigate the effects of complete pellet feed with different nutritional levels( NRC recommended value, 0.9 X NRC, 0.8 X NRC) on fattening lambs. A single factorial arrangement of treaUnents was adopted in the experiment. Lambs were randomly divided into three treatments(A group, B group and C group). The results of feeding trail showed as follows: the intakes of food were 1145.8, 1382.7 and 1474.OgId in group A, B, C respectively. The intakes of food in group B and C were better than that in group A(P<0.01). The intakes of DE and CP in group B(16.6OMJ, 220.12g) was better than that in group A(15.62MJ, 183.45g) and group C(15.42MJ, 211.35g). Average daily gain were 0.255, 0.238 and 0.206kg in group A, B, C respectively. Average daily gain was higher in group B than that in group C(P<0.05). Feed conversion ratio in group A. B were better than that in group C(P<0.01). The results of digestion and balance experiment showed that (1) the intakes of diet, energy, nitrogen and digestible acid detergent fiber(ADF) in group B was higher than that in group A(P<0.0 1). The apparently digestibility of nitrogen in group B was higher than that in group A(P<0.05).(2) The intakes of Ca, P in group B were higher significantly than that in group A(P<0.0 1), but there was no significant difference in digestible quantity, apparently digestibility, retention quantity and retention rate of Ca and P among three groups(P>O.05). (3) The digestible ADF and digestibility of ADF in group C were better than that in group A and group B, and that in group B was higher than that in group A(P<0.05). The results of this study demonstrate that 0.9 X NRC nutritional level has the best effect on fattening lambs(3.5-4months) in the case of complete pellet feed. The energy, nitrogen, ADF, Ca and P of feed were also utilized well in this level group. It can be concluded that 0.9 X NRC nutritional level complete pellet feed could be popularized in intensive fattening lambs. 0.8 XNRC nutritional level has no better effect than I and 0.9 NRC nutritional level, but the proportion of concentrate was the lowest(36.9%), and it can be used in those areas where concentrate was insufficient.