CAJ | 학술논문

试验采用随机分组试验设计,选择规模化养殖模式、园区式奶农合作组织养殖模式下的2个奶牛场,每个奶牛场选择80头健康的泌乳奶牛,按照产奶胎次、体重、泌乳阶段和产奶量相近原则随机分为2组,每组40头,就试验组饲粮中添加25g/（头·d）过瘤胃赖氨酸（RPLys）对奶牛产乳量及乳成分的影响进行研究。试验结果发现,经过饲喂之后,试验组与对照组相比,产奶量有显著提高（P〈0.05）。两种模式下乳蛋白和乳脂肪含量均有提高趋势,但是试验组与对照组没有显著差异（P〉0.05）。乳糖、非脂乳固体两个指标略有提高,但差异不显著（P〉0.05）。规模化和园区式的试验组相对于对照组每天每头奶牛的净增利润分别为1.80元和0.52元。
시험채용수궤분조시험설계,선택규모화양식모식、완구식내농합작조직양식모식하적2개내우장,매개내우장선택80두건강적비유내우,안조산내태차、체중、비유계단화산내량상근원칙수궤분위2조,매조40두,취시험조사량중첨가25g/（두·d）과류위뢰안산（RPLys）대내우산유량급유성분적영향진행연구。시험결과발현,경과사위지후,시험조여대조조상비,산내량유현저제고（P〈0.05）。량충모식하유단백화유지방함량균유제고추세,단시시험조여대조조몰유현저차이（P〉0.05）。유당、비지유고체량개지표략유제고,단차이불현저（P〉0.05）。규모화화완구식적시험조상대우대조조매천매두내우적정증리윤분별위1.80원화0.52원。
A randomized block experiment was carried out. Two dairy farms that the large scale dairy farm and the park-style dairy cooperative were selected.A total of 80 dairy cows with similar age,body weight,parity,milk production and lactation stage were selected from each farm and then divided into 2 groups,40 Holstein cows in each group.The experiment groups were used to evaluate the effect of supplementation of rumen-bypass amino acid（Lys） on milk production,and milk components. 25 g rumen-protected lysine（RPLys） was added for individual dairy cow in experiment groups.The results showed that comparing with the control group,the milk yield of the experimental groups was increased significant （P﹤0.05）. The milk protein and milk fat percentage were tended to increase（P 0.05）.Other milk components content also increased slightly（P 0.05）.The net income of experiment group was higher than that of control group. The increased net income for experiment group were 1.80 yuan/d,0.52 yuan/d for the large scale dairy farm and the park-style dairy cooperative respectively.