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| Retz, Stefanie; Georg, Heiko; Van den Weghe, Herman. |
| Ammonia emissions from barns have a severe impact on the environment. Especially dairy cattle, kept in loose housing, contribute to the total emission of ammonia up to 50%. Soiled walking areas like slatted floors, are realised as one of the main sources of the emission. In this study, a special cleaning device was used in order to remove manure from a slatted floor in an organically run dairy barn. It was investigated how the combination of a rubber-scraper, mechanical star discharge rotors and high-pressure water nozzles affects the ammonia emission from the floor. Six concrete test elements (55cm x 62cm x 20cm) were cut out of the existing slatted floor in order to be able to separate them from other sources of ammonia emission in the barn. With a... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2011 |
URL: http://orgprints.org/17381/3/Retz_17381.pdf |
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| Elbe, Ulrike; Roß, Antje; Steffens, Günter; Van den Weghe, Herman; Winckler, Christoph. |
| The aim of this study was to examine the excrement load in outdoor ranges due to the outdoor run use of free-range laying hens (organic farming system) to quantify the accumulation of nutrients in the soil. The number of hens using the run (flock of 4,500 hens) were recorded (digital photographs; scan sampling interval 10 min, 5 hours/d, 23 d; 7 to 10/2003) and sward protection grids, positioned at different distances (2 , 6, 17 m) from the barn were used to get the amount of excreta (number and weight of droppings). On average 9.8 % of the hens used the range out of which 69 % preferred the area close to the barn (0-17 m). Excretion rates per hen amounted to 12,4 g*hour, thus accounting for a share of 5 % of the total excrements of the flock. The... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Poultry; Air and water emissions. |
| Ano: 2005 |
URL: http://orgprints.org/3842/1/3842.pdf |
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