The effects of fermented rapeseed meal replacing soybean meal in a fully mixed diet on the production performance,serum biochemical indicators,and nutrient digestibility of cows
This experiment aims to investigate application effect of fermented rapeseed meal in cow breeding. Try to randomly divide 120 Hostein cows in similar condition into 4 groups,with 3 replicates in each group and 10 cows in each replicate. The control group was provided with feed according to NY/T 34-2004,while the other three groups of cows were fed with fermented rapeseed meal as a substitute for 33.33％ (experimental group Ⅰ),66.67％ (experimental group Ⅱ),and 100％ (experimental group Ⅲ) of soybean meal in the experimental diet. The pre trial period is 7 days,and the main trial period is 30 days. Results:Compared with the control group,(1) The dry matter intake and the average daily milk of Experiment group Ⅲ was significantly reduced by 6.99％ (P<0.05),9.70％ (P<0.05);The milk protein rate in Experiment group Ⅰ significantly increased by 7.67％ (P<0.05). (2) Compared with the control group,The total serum protein,albumin,urea nitrogen content in Experiment group Ⅲ was significantly reduced by 5.38％ (P<0.05),13.95％ (P<0.05),8.68％ (P<0.05). As the proportion of fermented rapeseed meal replacing soybean meal increases in the total mixed diet,serum cholesterol shows a decreasing trend (0.05<P<0.10). (3) Compared with the control group,The dry matter and crude protein digestibility of Experiment group Ⅲ were significantly reduced (P<0.05). With the increase of the proportion of fermented rapeseed meal replacing soybean meal in the total mixed diet,the digestibility of neutral detergent fiber showed an upward trend (0.05<P<0.10). Under the conditions of this experiment,the proportion of fermented rapeseed meal replacing soybean meal in the total mixed diet of cows should not exceed 66.67％,which will not have a significant negative impact on the production performance,serum biochemical indicators,and nutrient digestibility of cows.
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