Abstract

To feed people in the coming decades, an increase in sustainable animal food production is required. The efficiency of the global food production system is dependent on the knowledge and improvement of its submodels, such as food animal production. Scientists use statistical models to interpret their data, but models are also used to understand systems and to integrate their components. However, empirical models cannot explain systems. Mechanistic models yield insight into the mechanism and provide guidance regarding the exploration of the system. This review offers an overview of models, from simple empirical to more mechanistic models. We demonstrate their applications to amino acid transport, mass balance, whole-tissue metabolism, digestion and absorption, growth curves, lactation, and nutrient excretion. These mechanistic models need to be integrated into a full model using big data from sensors, which represents a new challenge. Soon, training in quantitative and computer science skills will be required to develop, test, and maintain advanced food system models.

Highlights

  • Food animal production has been a component of agricultural output for more than 11,000 years [1]

  • The animal production system contributes to human-edible nutrients through provision of meat, dairy products, and eggs

  • Animal products are an important source of many nutrients in the human diet. These positive factors must be weighed against the impact of animal production on the overall food supply and its environmental impact [7]

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Summary

Annual Review of Animal Biosciences

Use of Mechanistic Nutrition Models to Identify Sustainable Food Animal Production. Mechanistic modeling, model application, integrated nutrition systems

INTRODUCTION
NUTRITIONAL MODELING FOR SUSTAINABLE AGRICULTURE
Model Characterization
From Empirical to Mechanistic Elements
Use for Data Interpretation and Extension
Nutrient Digestion and Absorption
QPrt X I
Nutrient Excretion
INTEGRATION OF MODELS FOR PROMOTING SUSTAINABLE FOOD PRODUCTION
Feed sold Volatile loss
FUTURE DIRECTIONS OF PRECISION AGRICULTURE
Findings
LITERATURE CITED

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