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Lecture 11

AGRC 112 Lecture 11: Ag 112 lecture 11

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AGRC 112
Takaya Kunio

Lecture 11 Liquid manure injection - Injected into the subsoil which reduces odour and prevents manure runoff from the land into surface water - The liquid manure you spray onto the top of the soil, but within 24 hours you have to be out there working it into the soil. If your spreading it on a pasture, where you cant work it in you will have to go with a liquid manure injection method Odour Reduction - Technologies - Sprinkling ( fine mist ) of vegetable oils in barn ( ex- canola oil. It will bind the dust particles and pull the odour in with it reducing the smell ) - Reduces odours and dust - Biofilters - Exhaust through moist organic filter ( such as straw or wood chips although you will have to replace them quite regularly ) - Diet formulation - reduce N excretion ( only feed what is needed ) - Rapid manure processing / separation ( not intense odours when the manure is fresh, only smells bad when you leave it for fermentation ) ( the liquids are nitrogen fertilizer and the solids can start going into compost ) - Process manure/ biomass into renewable energy Manure storage and treatment - Composting and solid manure system - Solid manure generates reduced odour than liquid manure - The urine hold more nitrogen and the manure has little nitrogen in it all together - You don't want to have the urine and manure mixed together because that increases the process of fermentation - Urea in urine convertes to ammonia by bacteria in fecies - separate organic solids( you want to keep the ammonia in the manure to keep the quality of it ) - Separates coarse solids - compost but leaves fine suspended solids as source of N Animals and the environment - Water Environmental consequences of water use in animal agriculture 1. Major user of water 2. Effects of nitrogen and phosphorus fertilizers ( manure ) in stimulating eutrophication of lakes and reservoirs ( if it is implied improperly it runs off into the water table and polluted them, the nitrogen and phosphorous will promote the growth in the water, it sucks all the oxygen level out of the water and kill off all the life in the water ) 3. Loss of wildlife habitat from riparian zone use for pasture and range 4. Microbial contamination of ground and surface water quality primarily associated with intensive agriculture Livestock and water -
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