Effects of Increasing Level of Metabolizable Energy and Protein on Feed Intake, Nutrient Digestibility, Performance and Blood Metabolites of Zell Pregnant Ewes at Late Gestation

Moradi, M; Chashnidel, Y.; Yansari, A. Teimouri; Dirandeh, Essa

doi:10.29252/rap.9.22.60

rap

2018

DOI: 10.29252/rap.9.22.60

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Effects of Increasing Level of Metabolizable Energy and Protein on Feed Intake, Nutrient Digestibility, Performance and Blood Metabolites of Zell Pregnant Ewes at Late Gestation

M Moradi¹,

Y. Chashnidel²,

A. Teimouri Yansari³

et al.

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2020

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Cited by 2 publications

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The Effect of Reducing Ration Protein Level Using Commercial Premixes on the Performance and Blood Parameters of Holstein Dairy Cows

khorsand

ghalamkari

sanei³

et al. 2020

rap

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The aim of this experiment was to evaluate the effects of concentrate premixes containing of by-pass proteins (BP) in balanced low protein diets for essential amino acids on performance, blood metabolites and nitrogen efficiency of lactation Holstein dairy cows. Twenty-four multiparous Holstein cows (in 3rd parity and DIM 80±10) randomly were divided to three experimental rations including, 1) control ration with 17.5% CP based on NRC 2001 recommendations, 2) Low protein ration containing concentrate premix with 16.5% CP and 3) Low protein ration containing concentrate premix with 15.5% CP. The ratio of the rumen undegradable protein (RUP) to rumen degradable protein (RDP) in experimental diets was 37:63 and the ratio lysine to methionine was adjusted by concentrate premix up to 3:1 and 2.8:1 in the diet 16.5% and 15.5% CP, respectively. The results showed that the dry matter intake (DMI) increased linearly with a reduction of CP in the diets (P=0.048). The highest 3.5% fat corrected milk yield (FCM) and energy corrected milk (ECM) was recorded for 16.5% CP diet that showed a significant difference than other groups (P=0.038). Milk protein yield and milk nitrogen efficiency (MNE) showed significantl difference between control and 16% CP diets (P=0.05 and P=0.03, respectively). This study showed that decreased in CP levels compared to recommended NRC values ( 2001), and providing an optimal ratio of limiting amino acids can increase nitrogen yield while maintaining production.

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The Effect of Reducing Ration Protein Level Using Commercial Premixes on the Performance and Blood Parameters of Holstein Dairy Cows

khorsand

ghalamkari

sanei³

et al. 2020

rap

View full text Add to dashboard Cite

show abstract

Effects of Feeding Different Levels of Flaxseed on Performance, Nutrient Digestibility and Blood Parameters of Pre-Weaning Calves

Hosseiabadi

Torbatinejad

Ghoorchi

et al. 2020

rap

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Effects of Increasing Level of Metabolizable Energy and Protein on Feed Intake, Nutrient Digestibility, Performance and Blood Metabolites of Zell Pregnant Ewes at Late Gestation

Cited by 2 publications

References 37 publications

The Effect of Reducing Ration Protein Level Using Commercial Premixes on the Performance and Blood Parameters of Holstein Dairy Cows

The Effect of Reducing Ration Protein Level Using Commercial Premixes on the Performance and Blood Parameters of Holstein Dairy Cows

Effects of Feeding Different Levels of Flaxseed on Performance, Nutrient Digestibility and Blood Parameters of Pre-Weaning Calves

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