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| Tontti, Tiina; Nykänen, Arja; Kuisma, Miia. |
| Two field experiments, conventional grass ley and organic grass-clover ley, were established with barley as a nurse crop in spring 2000 and given either low or high fertilization with mineral fertilizer (Mineral) or composts. The compost types were municipal biowaste (Biowaste), biowaste + sewage sludge (BioSludge) and cattle manure (Manure). Plant yields and nitrogen (N) uptakes were measured for three years and efficiency of N utilization was estimated. In single application of compost, the total N was mainly in organic form and less than 10% was in inorganic form. Along with increasing amount of inorganic N applied in compost, the yield, N uptake and N recovery increased during the application year. The highest compost N recovery in the application year... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2009 |
URL: http://orgprints.org/16627/1/tontti.pdf |
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| Uusi-Kämppä, Jaana; Huuskonen, Arto; Kuisma, Miia; Nykänen, Arja; Heinonen-Tanski, Helvi. |
| Numbers of faecal microbes (faecal coliforms, enterococci, sulphite-reducing clostridia and coliphages) were determined in run-off waters from cattle farms in 1998-2005. Water samples were collected from drain wells and open ditches adjacent to exercise yards and forested feedlots for cattle, a grass field with slurry applications and a pasture with buffer strips. The indicator numbers were the highest in run-off waters from asphalt exercise yards while the figures were even 100-fold smaller in waters from a bark covered yard. In the forested feedlots, where cattle were fed for the winter months or all the year round, the indicator numbers were as high as the ones in a grass field with slurry applications or a pasture. There was a severe risk of... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Animal husbandry; Air and water emissions. |
| Ano: 2006 |
URL: http://orgprints.org/8969/1/ymparisto1.pdf |
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| Seuri, Pentti; Kuisma, Miia. |
| Water discharge and nutrient leaching studies were conducted in an experimental field under organic farming practice for 20 years. The water discharge measurements cover five years out of a six-year crop rotation. The water discharge for the whole year was 1520 m³/ha (=152 mm). More than 2/3 of the total discharge occurred in April-May. The total precipitation for the whole year was 680 mm. The total amount of N in the drainage runoff was 11.5 kg/ha and the flow-weighted average content 7.5 mg/l. The total amount of P in the drainage runoff was 48 g/ha and the flow-weighted average content 0.031 mg/l. 85 % of the total P was dissolved reactive phosphorus (DPR). Some preliminary correlation between N leaching and N management was observed, i.e. higher... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2006 |
URL: http://orgprints.org/8968/1/ymparisto.pdf |
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