Acetohydroxamic Acid And Lead The Rumen Amino Acids Influence Milk Cow Productional Function Research

It was considered a new-style feed additive of ruminant that Acetohydroxmic acid(AHA) was quite an efficient urease inhibitor. So it could not only control the activation of the urea utilize by ruminants and sufficiently exerted the utilized efficiency on nitrogen of rumen microorganism and composed most thalli albumen, but also economized the protein feed.It was thought that methionine or lysine was an restricted amino acid by compounded milk protein. It could advanced the efficiency passing the rumen that the ruminant utilized the amino acid.The experimentation was conducted to study AHA by the Science and Technology Exploiture Ltd. of Ha'er bin coming gold blessing and rumen by-pass iron-lysine, rumen by-pass methionine by Ha'er bin Kunbao Labour-trade Ltd.. It carried breeding tests through three years by divided into 3 groups according to dose of childbearing times, dairy months and dairy quantity on Animal Husbandry and Veterinary science of Heilongjiang Vocational College and Hongji pasture of Daqing. It was studied that the effect of acetohydroxamic acid and rumen by-pass methionine or iron-lysine on milk-conduction performance in milch cows.The experimentation with AHA of the milch cows' diets: In the experiment, the 36 milch cows for the metaphase dairy were assigned to four groups randomly with three replicates of 3 cows per group. The contraposed group (Ⅰ) was fed with basic diet, and the testing groups (Ⅱ,Ⅲ,Ⅳ) were added AHA contents of 20mg/kg, 25mg/kg and 30mg/kg in the basic diets (according to the dried matter). It was 30 days per testing time. The milk conduction of per testing group was statisticsed with a replicate of per 10 days, and the changes of all the testing times were statestcsed.The results of experiment showed that there was significant on the contraposed group and the testing groups (P＜0.05). Because it was advanced with the testing groups (Ⅱ,Ⅲ,Ⅳ) that the milk conductions were added respectively by 11.6%, 16.7%, 10.5%, it was obvious effect on the milch cows with the appended AHA (25mg/kg) in the diet. The results of rearing experiment of the urea diet and the routine diet with the appended AHA (25mg/kg) showed that they had significant higher than the contraposed group (P＜0.05), they were advanced respectively by 16.4% and 15.4%. There was no significant effect on milk conduction between the urea diet group and the routine diet group ( P＞0.05). The urea diet group or the routine diet group and the contraposed group had no significant effect on milk fat and milk density (P＞0.05).The experimentation with rumen by-pass lysine and methionine of the milch cows' diets: The tests were two groups with one group appended by-pass methionine(10g) and protected lysine(15g), the other group appended by-pass methionine(10g) and chelated iron-lysine (15g). The results of experiment showed that it was obvious differently on milk conduction and feed conversion between the testing groups and the contraposed group (P＜0.05). The milk conductions were respectively added1.64 kg and1.92 kg, and they were advanced 6.2% (P＜0.05) and 7.2% (P＜0.05). There was no significant effect between two testing groups (P＞0.05), but there was yet no significant different on milk fat and milk protein between the testing groups and the contraposed group (P＞0.05). The experimentation with AHA and rumen by-pass amino acid of the milch cows' diets: The 36 milch cows for the metaphase dairy were assigned to four groups randomly with the average milk conduction (26.26kg). The results showed that the appended 25mg/kg diet group with AHA, protected methionine (10g) and chelated iron-lysine (13g) was very significant different than the others on milk conduction, milk fat, milk protein and feed conversion, that respectively advanced 10.48% (P＜0.01), 5.70% (P＜0.01), 5.76% (P＜0.01) and 10.65% (P＜0.01).