Nutrition and Livestock Performance Parameters

A set of flashcards defining key performance and nutritional parameters for livestock, including formulas for growth, efficiency, and energy evaluation.

FCR (Feed Conversion Ratio)

Meaning: Feed Conversion Ratio. Formula: $\text{Feed intake} \div \text{weight gain}$. Importance: Measures feed efficiency; lower FCR = better efficiency.

FCE (Feed Conversion Efficiency)

Meaning: Feed Conversion Efficiency. Formula: $\text{Weight gain} \div \text{feed intake}$. Importance: Opposite of FCR; higher = better.

ADG (Average Daily Gain)

Meaning: Average Daily Gain. Formula: $\text{Total weight gain} \div \text{number of days}$. Importance: Indicates growth rate.

ADF (Average Daily Feed Intake)

Meaning: Average Daily Feed Intake. Formula: $\text{Total feed consumed} \div \text{number of days}$. Importance: Measures feed consumption.

BWG (Body Weight Gain)

Meaning: Body Weight Gain. Formula: $\text{Final weight} - \text{initial weight}$. Importance: Total growth during trial.

DMI (Dry Matter Intake)

Meaning: Dry Matter Intake. Description: Feed intake excluding moisture. Importance: Standardized feed consumption measure.

FI (Feed Intake)

Meaning: Feed Intake. Description: Amount of feed consumed. Importance: Basic nutrition parameter.

PER (Protein Efficiency Ratio)

Meaning: Protein Efficiency Ratio. Formula: $\text{Weight gain} \div \text{protein intake}$. Importance: Evaluates protein utilization.

FER (Feed Efficiency Ratio)

Meaning: Feed Efficiency Ratio. Formula: $\text{Weight gain} \div \text{feed intake}$. Importance: Similar to FCE.

NFE (Nitrogen-Free Extract)

Meaning: Nitrogen-Free Extract. Description: Calculated soluble carbohydrates. Importance: Estimates energy-rich carbohydrates.

CP (Crude Protein)

Meaning: Crude Protein. Formula: $\text{Nitrogen} \times 6.25$. Importance: Estimates protein content.

CF (Crude Fiber)

Meaning: Crude Fiber. Description: Indigestible fiber portion. Importance: Indicates fiber level.

EE (Ether Extract)

Meaning: Ether Extract. Description: Fat content of feed. Importance: Energy contribution from fats.

Ash

Meaning: Mineral residue after burning. Importance: Indicates mineral content and used for nutrient evaluation.

TDN (Total Digestible Nutrients)

Meaning: Total Digestible Nutrients. Description: Sum of digestible nutrients. Importance: Energy value indicator.

ME (Metabolizable Energy)

Meaning: Metabolizable Energy. Description: Energy available after losses. Importance: Important for ration formulation.

DE (Digestible Energy)

Meaning: Digestible Energy. Formula: $\text{Gross energy} - \text{fecal energy loss}$. Importance: Energy utilization measure.

NE (Net Energy)

Meaning: Net Energy. Description: Usable energy for maintenance/production. Importance: Most accurate energy estimate.

BCS (Body Condition Score)

Meaning: Body Condition Score. Description: Visual fat/muscle assessment. Importance: Evaluates nutritional status.

Digestibility Coefficient

Meaning: Nutrient digestibility percentage. Formula: $\frac{(\text{Nutrient intake} - \text{fecal output})}{\text{nutrient intake}} \times 100$. Importance: Measures nutrient utilization.

Feed Cost per Gain

Meaning: Economic efficiency. Formula: $\text{Feed cost} \div \text{weight gain}$. Importance: Economic performance indicator.

Mortality Rate

Meaning: Death percentage. Formula: $\frac{\text{Number dead}}{\text{total animals}} \times 100$. Importance: Health/performance indicator.

Carcass Yield/Dressing %

Meaning: Carcass proportion. Formula: $\frac{\text{Carcass weight}}{\text{live weight}} \times 100$. Importance: Meat production efficiency.