composting horse manure presentation at 2004 rocky mountain horse expo kathy corwin doesken, csu
TRANSCRIPT
Composting Horse ManurePresentation at 2004 Rocky Mountain Horse
ExpoKathy Corwin Doesken, CSU
Whether you have one horse. . .
or many horses...
You Need to Manage Your Manure!
• Maximize the agronomic and economic benefits of manure while reducing adverse environmental consequences
• Minimize manure problems with flies, odor, dust, parasite reinfection, spread of insect–borne diseases, fire danger, AND improve the view
What can I do with manure beside apply it to
farm land?
•Make compost!
Why Try Composting?
• Reduces volume of manure about 50%• Minimizes pathogen, weed, odor, and
insect problems• Stabilizes nitrogen and phosphorus
compounds which avoids water pollution• Produces a useful and saleable soil
amendment• Retain control of your waste stream
Manure is a resource! This costs you money and wastes a valuable resource. Consider other options.
What You Need to Compost
• Manure, waste feed, bedding• Convenient and environmentally
appropriate site (away from wells, water)
• Source of water to wet compost• Equipment or hand tools• Knowledge of composting principles
METHODS OF COMPOSTING
• Active windrows: this presentation
• Passive windrows: CSU fact sheet*
• Worms : CSU fact sheet*
• Bins*some fact sheets here today; online:
www.ext.colostate.edu
What is composting?
Composting is the managed,biological, oxidation process that converts heterogeneous organic matter into a more homogeneous, fine-particled humus-like material. from FIELD GUIDE TO ON-FARM COMPOSTING
MANAGED: what YOU do!
• Provide carbon (C) and nitrogen (N) in 30:1 ratio
• Provide oxygen for oxidation process at 5-20%
• Provide water to keep moisture at 50%
BIOLOGICAL:what microorganisms (MO’s) do
• Many species of bacteria and fungi metabolize the C and N to grow and multiply, using oxygen and water in the process
• Composting is farming MO’s, which are present in the soil!
OXIDATION
• “In the presence of air” • Used by MO in respiration• Oxygen is in pore space in
compost windrow • Use bulking material and turn
to maintain pore space for air
Leaves make ideal bulking material for horse manure; so does most bedding
Heterogeneous Organic Matter
• Horse manure• Bedding• Waste hay• Spoiled feed or grain• Leaves and grass clippings• Kitchen scraps
Heterogenous material: leaves and manure very visible
Homogeneous (homo=same) Organic Matter, Fine-Particled, Humus-Like Material
• COMPOST!!!!!!!!
How is compost made from horse manure?
Choose a site
• Mowed area, smooth, slightly sloping
• Near manure source• Near water tap BUT at least 100 ft,
from “waters of the state” or wells• Control run-on and run-off• Table for area needed in fact sheet
on active windrows
BUILDING THE WINDROW
• Layer manure loosely with bulking material, adding water to 50%
• Work end view into rectangular shape like loaf of bread, top flattened
• Add new material at one end only
Newly Built Windrow at Large Horse Facility
Experimental windrow at CSU
Add plenty of water until pile is as damp as a wrung-out sponge. Composting organisms
need moisture to work.
MONITOR WINDROW
• Check temperature with compost thermometer (www.reotemp.com) or your hand
• Heat is an indicator of biological activity of microorganisms
• Observe heating cycle: temperatures increase then decrease several times
• After a decrease, turn windrow to aerate; add water if needed
Relationship of Time and Temperature to Compost Turning
0
20
40
60
80
1 00
1 20
1 40
1 60
1 2 3 4 5 6 7 8 9 1 0 1 1 2 1 3 1 4
Days from First Building or Turning
Tem
pera
ture
(Deg
. F)
Height and width of windrow depends on equipment!
4-6’tall-
HOT AREA
6 - 10 feet wide (?)
END VIEW OF COMPOST WINDROW
The temperature will rise to over 140º in a newly built pile, which will kill most weed
seeds and pathogens.
Continued Monitoring…
• After turning, monitor heat cycle again
• Turn when temperature decreases• Check water; Add if necessary• Repeat turnings until temperature
ceases to rise (about 4 turning cycles)
Variations on Windrow Composting
•Bins•Passive Aeration•Worms
CURING PHASE
• When temperatures cease rising, mesophilic (mid-temperature) MO’s take over to finish process
• Keep windrow moist, less than 50%• Takes 1-2 months• Compost becomes homogenous,
dark
Why cure?
• Assures highest quality product• pH shifts to neutral• Soil MO’s recolonize compost, impart
disease suppressing qualities to compost
• If too much C left, use of this compost as a soil amendment may cause a temporary N deficiency, just the opposite of what you want!
When is my compost done?
• After heating cycles stop• After curing• Check for homogenous, fine-particled
humus-like appearance• Earthy smell• Maturity tests: Solvita test* (do-it-
yourself ), experience, confirmation by testing at a soil lab*www.woodsend.org
How can compost be used?
• As a soil amendment to increase soil organic matter, fertility, water holding capacity
• Use as topdressing for pastures,lawns, gardens, shrubs, trees
• Make compost tea (new area)• Stall bedding• Sell to landscapers
REFERENCES• Visit our website at
www.manuremanagement.info• Composting* from Rodale press (good
place to start, good reference, at the library)
• On-Farm Composting,* NRCS (order CSU)• Visit www.CSUag.com
– Go to Cooperative Extension, Publications, Fact Sheets!
*sample copy on display
How to learn more about composting?
•Organize a workshop, arrange mentoring: contact us
Dr. Jessica Davis, extension manure management specialist:
Soil and Crop Sciences Department, CSU