Effect of substituting alfalfa hay with beet pulp, treated and untreated wheat straw on performance of high-producing dairy cows

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Hajmahmoodi Mohammad Mehdi; GHASEMI EBRAHIM; KHORVASH MOHAMMAD

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Journal: Iranian Journal of Animal Science Year:2018 | Volume:49 | Issue:1 Page(s): 159-170

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Title

Effect of substituting alfalfa hay with beet pulp, treated and untreated wheat straw on performance of high-producing dairy cows

Author(s)

Hajmahmoodi Mohammad Mehdi | GHASEMI EBRAHIM | KHORVASH MOHAMMAD | Issue Writer Certificate

Keywords

Beet pulpQ1

economic returnQ1

undigested fiberQ1

wheat strawQ1

Abstract

In this study, the effects of partial substitution of alfalfa hay (AH) with high fiber by-products (wheat straw: WS, Beet pulp: BP) were evaluated on performance of high producing dairy cows. Eight high yielding cows (54± 2. 5 kg milk production) were used in a 4 × 4 Latin square design and fed 4 experimental diets. The 4 experimental diets contained constant level of corn silage (19. 2%) with different proportions of 1) 19. 2% alfalfa hay (CON), 2) 3. 8% AH, 5. 8% WS, 5. 8% BP (WS-BP), 3) 3. 8% AH, 8. 5% WS (WS) and 4) 3. 8% AH and 10. 2% treated WS (TWS). Diets were similar in of NEL, CP, and NDF contents but WS-BP and TWS diets had lower undigested NDF (uNDF) level. Results indicated replacement of AH with high fiber sources increased nutrient digestibilities (P < 0. 01). Moreover, cows received by-products substitutes showed greater dry matter intake than control cows (P<0. 01). Milk yield and milk composition did not differ across treatments. Therefore, this resulted in a tendency for improved milk production efficiency (P=0. 08) with feeding CON diet. Efficiency of 3. 5% FCM was similar among different diets. Feeding different by-products diets had no effect on ruminal pH, total VFA concentration, and chewing behavior, but tended to increase acetate: propionate ratio (P=0. 06). Substituting wheat straw with/without Beet pulp for alfalfa hay resulted in improved DM and digestibility but reduced milk production efficiency in high-producing dairy cows.

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APA: Copy

Hajmahmoodi, Mohammad Mehdi, GHASEMI, EBRAHIM, & KHORVASH, MOHAMMAD. (2018). Effect of substituting alfalfa hay with beet pulp, treated and untreated wheat straw on performance of high-producing dairy cows. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 49(1 ), 159-170. SID. https://sid.ir/paper/193531/en

Vancouver: Copy

Hajmahmoodi Mohammad Mehdi, GHASEMI EBRAHIM, KHORVASH MOHAMMAD. Effect of substituting alfalfa hay with beet pulp, treated and untreated wheat straw on performance of high-producing dairy cows. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2018;49(1 ):159-170. Available from: https://sid.ir/paper/193531/en

IEEE: Copy

Mohammad Mehdi Hajmahmoodi, EBRAHIM GHASEMI, and MOHAMMAD KHORVASH, “Effect of substituting alfalfa hay with beet pulp, treated and untreated wheat straw on performance of high-producing dairy cows,” IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 49, no. 1 , pp. 159–170, 2018, [Online]. Available: https://sid.ir/paper/193531/en

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