中国乳业
中國乳業
중국유업
CHINA DAIRY
2014年
3期
36-38,39
,共4页
非蛋白氮%荷斯坦奶牛%配对试验%产奶量
非蛋白氮%荷斯坦奶牛%配對試驗%產奶量
비단백담%하사탄내우%배대시험%산내량
non-protein nitrogen%Holstein cows%paired test%milk production
本文通过配对试验研究了非蛋白氮对高产荷斯坦奶牛生产性能、乳成分和体细胞数的影响。以泌乳天数、产奶量相近和胎次相同为原则在高产牛中对牛只进行配对，83对符合配对要求的牛只被随机分为试验组和对照组。对照组TMR日粮不变；在试验组TMR日粮中添加非蛋白氮（50 g/头?天），减少豆粕用量（350 g/头?天），基础日粮的其它组分与对照组一致。本试验预试期7天，正式试验期60天。61对奶牛符合整个试验的要求。试验组产奶量平均值比对照组高0.47 kg/头，试验期间两组乳成分和体细胞数均无明显变化。非蛋白氮对荷斯坦奶牛的产奶量有一定程度的提高，对乳成分和体细胞数没有明显的影响。
本文通過配對試驗研究瞭非蛋白氮對高產荷斯坦奶牛生產性能、乳成分和體細胞數的影響。以泌乳天數、產奶量相近和胎次相同為原則在高產牛中對牛隻進行配對，83對符閤配對要求的牛隻被隨機分為試驗組和對照組。對照組TMR日糧不變；在試驗組TMR日糧中添加非蛋白氮（50 g/頭?天），減少豆粕用量（350 g/頭?天），基礎日糧的其它組分與對照組一緻。本試驗預試期7天，正式試驗期60天。61對奶牛符閤整箇試驗的要求。試驗組產奶量平均值比對照組高0.47 kg/頭，試驗期間兩組乳成分和體細胞數均無明顯變化。非蛋白氮對荷斯坦奶牛的產奶量有一定程度的提高，對乳成分和體細胞數沒有明顯的影響。
본문통과배대시험연구료비단백담대고산하사탄내우생산성능、유성분화체세포수적영향。이비유천수、산내량상근화태차상동위원칙재고산우중대우지진행배대，83대부합배대요구적우지피수궤분위시험조화대조조。대조조TMR일량불변；재시험조TMR일량중첨가비단백담（50 g/두?천），감소두박용량（350 g/두?천），기출일량적기타조분여대조조일치。본시험예시기7천，정식시험기60천。61대내우부합정개시험적요구。시험조산내량평균치비대조조고0.47 kg/두，시험기간량조유성분화체세포수균무명현변화。비단백담대하사탄내우적산내량유일정정도적제고，대유성분화체세포수몰유명현적영향。
This study was designed to determine the influence of non-protein nitrogen on milk production,milk composition and somatic cellcount of high yield Holstein cows. Eighty-three groups of cows with similar lactation days,similar milk production and same parity were divided into experimental and control groups randomly. TMR diets of control group unchanged and the test group’s were supplemented with non-protein nitrogen(50 g/head?d),at the mean time,reduced the dosage of soybean hul s (350 g/head?d ),other components of the basal diet compared with the control group were unchanged. The test was divided into pre-test(7 days) and main test(60 days). Sixty-one pairs of cows met the requirements throughout the test. The average of daily milk production of experimental group was higher than control group(0.47 kg/head).Milk composition and somatic cellcount of experimental and control group did not change significantly during the test. Non-protein nitrogen has some improvement on milk production performance of Holstein cows,but no signiifcant effect on milk composition and somatic cellcount.
