动物营养学报
動物營養學報
동물영양학보
Chinese Journal Of Animal Nutrition
2015年
9期
2832-2840
,共9页
半胱胺%酵母培养物%产奶性能%氮排泄
半胱胺%酵母培養物%產奶性能%氮排洩
반광알%효모배양물%산내성능%담배설
cysteamine%yeast culture%milk performance%nitrogen excretion
本试验旨在研究半胱胺( cysteamine,CS)和酵母培养物( yeast culture,YC)添加量对奶牛产奶性能及氮排泄的影响. 选取年龄、体重、产奶量及泌乳期[(135±15) d]相近的荷斯坦奶牛40头,分为10组. C组饲喂基础饲粮,试验组补饲不同水平组合的CS和YC,其中CS设3个添加量,分别为17.5(L)、20.0(M)和22.5 g/(d·头)(H);YC 设3 个添加量,分别为90 ( L)、100( M)和110 g/( d·头) ( H) ,共9 个不同添加量组合,分别为LL、ML、HL、LM、MM、HM、LH、MH和HH组,每组4个重复,每个重复1头. 预试期15 d,正试期60 d. 结果表明:1)各试验组产奶量均高于C组,以HM组最高,极显著高于C组( P<0.01);2)各试验组乳脂率、乳蛋白率均高于C组,均以HM组最高,乳中体细胞数则低于C组,以HM组最低, HM组与C组差异均极显著( P<0.01);3)各试验组饲粮氮泌乳转化效率均高于C组,以HM组最高,与C组差异极显著( P<0.01) ,LL、ML、HL、LM、MM、HM、LH、MH和HH组总氮排泄量比C组分别降低5.23%、8.50%、12.36%、21.92%、24.34%、27.25%、16.31%、18.10%、20.43%,HM组与C组差异极显著( P<0.01). 结果提示,泌乳奶牛饲粮联合添加CS和YC可提高产奶量,改善乳品质,提高饲粮氮泌乳转化效率,降低粪尿氮排泄量;本试验条件下的最佳联合添加组合为 CS 22.5 g/( d·头)、YC 100 g/( d·头).
本試驗旨在研究半胱胺( cysteamine,CS)和酵母培養物( yeast culture,YC)添加量對奶牛產奶性能及氮排洩的影響. 選取年齡、體重、產奶量及泌乳期[(135±15) d]相近的荷斯坦奶牛40頭,分為10組. C組飼餵基礎飼糧,試驗組補飼不同水平組閤的CS和YC,其中CS設3箇添加量,分彆為17.5(L)、20.0(M)和22.5 g/(d·頭)(H);YC 設3 箇添加量,分彆為90 ( L)、100( M)和110 g/( d·頭) ( H) ,共9 箇不同添加量組閤,分彆為LL、ML、HL、LM、MM、HM、LH、MH和HH組,每組4箇重複,每箇重複1頭. 預試期15 d,正試期60 d. 結果錶明:1)各試驗組產奶量均高于C組,以HM組最高,極顯著高于C組( P<0.01);2)各試驗組乳脂率、乳蛋白率均高于C組,均以HM組最高,乳中體細胞數則低于C組,以HM組最低, HM組與C組差異均極顯著( P<0.01);3)各試驗組飼糧氮泌乳轉化效率均高于C組,以HM組最高,與C組差異極顯著( P<0.01) ,LL、ML、HL、LM、MM、HM、LH、MH和HH組總氮排洩量比C組分彆降低5.23%、8.50%、12.36%、21.92%、24.34%、27.25%、16.31%、18.10%、20.43%,HM組與C組差異極顯著( P<0.01). 結果提示,泌乳奶牛飼糧聯閤添加CS和YC可提高產奶量,改善乳品質,提高飼糧氮泌乳轉化效率,降低糞尿氮排洩量;本試驗條件下的最佳聯閤添加組閤為 CS 22.5 g/( d·頭)、YC 100 g/( d·頭).
본시험지재연구반광알( cysteamine,CS)화효모배양물( yeast culture,YC)첨가량대내우산내성능급담배설적영향. 선취년령、체중、산내량급비유기[(135±15) d]상근적하사탄내우40두,분위10조. C조사위기출사량,시험조보사불동수평조합적CS화YC,기중CS설3개첨가량,분별위17.5(L)、20.0(M)화22.5 g/(d·두)(H);YC 설3 개첨가량,분별위90 ( L)、100( M)화110 g/( d·두) ( H) ,공9 개불동첨가량조합,분별위LL、ML、HL、LM、MM、HM、LH、MH화HH조,매조4개중복,매개중복1두. 예시기15 d,정시기60 d. 결과표명:1)각시험조산내량균고우C조,이HM조최고,겁현저고우C조( P<0.01);2)각시험조유지솔、유단백솔균고우C조,균이HM조최고,유중체세포수칙저우C조,이HM조최저, HM조여C조차이균겁현저( P<0.01);3)각시험조사량담비유전화효솔균고우C조,이HM조최고,여C조차이겁현저( P<0.01) ,LL、ML、HL、LM、MM、HM、LH、MH화HH조총담배설량비C조분별강저5.23%、8.50%、12.36%、21.92%、24.34%、27.25%、16.31%、18.10%、20.43%,HM조여C조차이겁현저( P<0.01). 결과제시,비유내우사량연합첨가CS화YC가제고산내량,개선유품질,제고사량담비유전화효솔,강저분뇨담배설량;본시험조건하적최가연합첨가조합위 CS 22.5 g/( d·두)、YC 100 g/( d·두).
This experiment was conducted to determine the effects of supplemental levels of cysteamine ( CS) and yeast culture ( YC ) on milk performance and nitrogen excretion of dairy cows. Forty Holstein lactating cows with similar age, body weight, milk yield and lactation stage [(135±15) days in milk] were divided in-to 10 groups, group C was fed a basal diet, experimental groups were jointly supplemented with CS and YC at different levels. The supplemental levels of CS were designed as 17.5 (L), 20.0 (M), 22.5 g/(d·cow) ( H) . The supplemental levels of YC were designed as 90 ( L) , 100 ( M) , 110 g/( d·cow) ( H) . The ex-perimental groups were LL, ML, HL, LM, MM, HM, LH, MH and HH groups, and each group had 4 rep-licates with 1 cow per replicate. The pretest lasted for 15 days, and the test lasted for 60 days. The results showed as follows: 1) cows in test groups had greater milk yield than those in group C, specially in group HM, and the difference between groups HM and C was significant (P<0.01); 2) cows in test groups had greater milk fat percentage and milk protein percentage, but had lower milk somatic cell count, specially in group HM, and the differences between groups HM and C were significant (P<0.01); 3) compared with group C, dietary nitrogen conversion efficiency of lactation in test groups was increased, specially in group HM, and the difference between groups HM and C was significant ( P<0.01) , and total nitrogen excretion in groups LL, ML, HL, LM, MM, HM, LH, MH and HH was reduced by 5. 23%, 8. 50%, 12. 36%, 21.92%, 24.34%, 27.25%, 16.31%, 18.10% and 20.43%, respectively, and the difference between groups HM and C was significant ( P<0.01) . The experimental results indicate that the supplementation of CS and YC in dairy cow diets can greater milk yield, improve milk quality, improve dietary nitrogen conversion efficiency of lactation, and reduce nitrogen excretion; the optimal combination supplemental levels of CS and YC are 22.5 and 100 g/( d·cow) under the condition in the present study.
