15144

1458 دكتري

دكتري

علوم دامي(تغذيه دام، نشخواركنندگان)

اصفهان : دانشگاه صنعتي اصفهان

1398

دوازده، 155ص.: مصور، جدول، نمودار

غلامرضا قرباني ، مسعود عليخاني

ابراهيم قاسمي، علي صادقي

حميدرضا عشقي زاده، فرزاد هاشم زاده ، حميد امانلو

1398/07/15

كتابنامه

كشاورزي

مهندسي كشاورزي

1398/07/15

2566055

Revising the fibe requirements of high milk producing dairy cows to apply grain straw Ali kahyani a kahyani @ag iut ac ir Sep 15 2019 Department of Animal Sciences College of Agriculture Isfahan University of Technology Isfahan 84156 83111 Iran 1 Gholam Reza Ghorbani1 ghorbani@cc iut ac ir 2 Masoud Alikhani alikhani @cc iut ac ir 3 Ebrahim ghasmei 4 Ali Sadeghi Sefidmazgi Department Graduate Program Coordinator S A M goliAbstractIn experiment 1 it has been showed that alfalfa hay AH and wheat straw WS compared withcorn silage CS had a greater amount of uNDF and lower NDFD and TTNDFD In experiment2 we investigated the effects of feeding diets with similar proportions of undigested 30 hincubation uNDF30 NDF by replacing CS AH or both with WS on performance oflactating cows All diets supplied 13 9 of dietary dry matter as FuNDF30 and beet pulp wasadded to balance diets for similar ruminal NDF digestibility 44 5 of NDF The results showedthat the substitutions did not influence milk production but the combination of WS and CS WSsubstituted for AH compared with a diet with CS and AH improved feed intake ruminal pH NDF digestibility and energy balance of dairy cows In experiment 3 the effects of a 30 hourundigested neutral detergent fiber uNDF30 adjusted substitution of wheat straw and beet pulpfor alfalfa hay and corn silage were investigated on performance of high producing dairycows Twelve multiparous 51 3 kg d of milk mean SE Holstein cows were used in areplicated 3 3 Latin square design with 28 d periods Three diets were formulated in whichwheat straw uNDF30 comprised 0 50 or 100 of forage uNDF30 and beet pulp was added todiets to achieve similar uNDF30 and available NDF in the rumen The substitution of WS and BPfor CS and AH with fixed uNDF30 improved feed efficiency and rumen pH decreased milk andprotein yield and did not affect ECM yield Key Words undigestible NDF forage source wheat straw beet pulp dairy cows 1 Department of Animal Sciences College of Agriculture Isfahan University of Technology Isfahan84156 83111 Iran 148

غلامرضا قرباني ، مسعود عليخاني

ابراهيم قاسمي، علي صادقي

حميدرضا عشقي زاده، فرزاد هاشم زاده ، حميد امانلو