Environmental Science for Equine Operations: Selection, Nutrition, and Management

Environmental science

Study of how horses, feeds, land, water, and facilities interact as one connected system.

Inputs in equine systems

Elements such as horses, hay/grain, bedding, water, electricity, fertilizers, herbidices.

Processes in equine systems

Activities such as grazing, manure deposition, stall cleaning, runoff.

Outputs in equine systems

Products like manure, dust, runoff carrying sediments/nutrients/pathogens.

Zero impact

An unrealistic goal; the objective is risk reduction.

Water pathway

Runoff and leaching of water that carries nutrients and sediment.

Soil pathway

Movement of soil eroded and compacted by hoof traffic, impacting infiltration and growth.

Air pathway

Movement of dust, odors, and gases created in dry areas and urine handling.

Biological pathway

Transport of pathogens and invasive species via manure and disturbed areas.

Best management practices (BMPs)

Site-specific methods to reduce environmental risk.

Compaction

Soil particles pressed together, reducing pore space for air and water.

Erosion

Movement of soil by water or wind which causes loss of topsoil.

Vegetation loss

Removal of plant cover due to overgrazing and concentrated traffic.

Nutrient management

Handling manure, urine, and wasted feed for safe nutrient cycles.

Leachate

Liquid that drains from manure piles, potentially high in nutrients.

Compaction's effect on runoff

Compacted soil produces more runoff and nutrient loss.

Stormwater management

Controlling rainfall runoff from roofs and compacted surfaces.

Runoff vs. infiltration

Runoff is surface water flow vs. infiltration which enters the soil.

Phosphorus movement

Typically moves with sediment in runoff; nitrogen can be dissolved.

Sensitive receptors

Vulnerable water resources that require extra caution.

Nutrient cycling

Process of managing nutrients through composting and land application.

Dust control measures

Methods to reduce dust include maintaining moisture in arenas.

Integrated Pest Management (IPM)

A framework combining methods to keep pests below damaging levels.

Composting

Controlled aerobic decomposition to turn manure into stable amendments.

Pasture ecology importance

Dense pastures reduce runoff, store carbon, and support soil structure.

Grazing management

Controlled approach to allow vegetation to regrow and prevent erosion.

Rotational grazing

Moving horses between paddocks to allow recovery of grazed areas.

Waterway protection measures

Buffer strips and setbacks to filter runoff before it reaches water.

High traffic area stabilization

Stabilizing zones like gates and waterers to reduce mud and erosion.

Nutrient overload

Accumulation of nutrients from feed that isn't exported from the farm.

Wildlife habitat management

Creating balance between wildlife support and managing negative interactions.

Invasive species prevention

Maintaining healthy vegetation and reseeding bare areas quickly.

Air quality issues

Concerns about dust, ammonia, and greenhouse gases from manure.

Environmental regulations

Legal requirements for protecting water and managing waste responsibly.

Nutrient management plan (NMP)

Written plan linking manure production/storage to crop needs.

Composting benefits

Reduces volume and odors, and creates a stable product for application.

Pathway for water contamination

How pollutants from equine areas can move toward sensitive water sources.

Emergency spill response

Plan for managing chemical storage to prevent contamination.

Environmental decision-making framework

A structured approach to identify problems and propose layered solutions.

Scenario analysis

Breaking down environmental issues into contributing factors for better management.

Impact of drainage design

How proper drainage prevents runoff and protects water quality.

Siting principles

Guidelines for placing facilities to avoid environmental impact.

Pasture improvement methods

Techniques used to enhance pasture health and nutrient cycling.

Manure application strategy

Applying manure based on soil tests and environmental considerations.

Regular monitoring impacts

Continuously assessing management effectiveness to ensure improvement.

Environmental risk assessment

Evaluating potential environmental impacts of equine management practices.

Vegetative buffers usage

Using plants to filter pollutants before reaching waterways.

Soil health assessment

Evaluating soil function to support vegetation, water management, and erosion control.

Pollution sources identification

Determining the origins and pathways of pollutants in equine facilities.

Discussion on BMP effectiveness

Evaluating the suitability of BMPs for specific sites and conditions.

Nutrient cycling significance

Importance of recycling nutrients for reducing waste and enhancing soil quality.

Legislation awareness

Understanding how laws impact equine management and environmental protection.