Digested slurry as a fertilizer for biogas ley

Digested slurry injected produces in this case comparable yields with mineral fertiliser. Because the primary growth is the largest and of the best quality it should be used for feed as the first option. The re-growths could then be used as a co-substrate in biogas reactors. Digested slurry is a good fertiliser for leys when injected. Injection of non-digested slurry reduces the ammonia emissions and leaching of soluble phosphorus but the significance of the low performance of nitrogen leaves open its fate

Influence of slurry and mineral fertiliser application technique on N2O and CH4 fluxes from a barley field

In this study, the effects of different application techniques on emissions of nitrous oxide and methane from a barley field were compared

Impacts of green manure on crop yield, nitrogen leaching and nitrous oxide emissions in sandy and clay soil lysimeters

We compared wheat yield, losses of nitrogen (N) in leaching, and gaseous losses as nitrous oxide (N2O) in silt and sand soil lysimeters. The studied cultivation systems were based on mineral fertilizer or mineral fertilizer together with clover green manure mulched at three different time points (August, October or May) before sowing of the main crop (either winter or spring wheat). Replacing 50–60% of mineral fertilizer N with green manure from a mixture of three clover species did not compromise the crop yield of winter or spring wheat. The results suggest that mulching of the green manure in the spring succeeding its sowing is the most beneficial practice with respect to environmental impacts. Total N leaching was higher from sandy soil than from silt loam whereas emissions of N2O were higher from the silt soil. Residual N from the clover biomass did not lead to an increase in leaching losses of N during the growing season or one year from the harvest. However, the residual N can be a source of high N2O emissions during the winter period in boreal climatic conditions

Adaptation measures of Finnish agriculture to climate change

MTT Agrifood Research Finland is to launch in 2006-2007 a new project aimed at stimulating measures to adapt to climate warming in the North. The program will consist of different projects carried out together with both national and international partners, and funded by several organizations

Modelling of water balance and nitrogen cycle in vegetative filter strips

The retention of nutrients by 10-m-wide grass buffers and buffers under natural vegetation has been studied over 10 years in Jokioinen in southwestern Finland. The results have been compared with those from 70-m-long plots without buffers. Grass was sown on the adjacent field and plots without buffers in 2002, and the field plots and these were grazed for 12 and 24 days in summer 2003 and 2004, respectively

Peat-based emissions in Finland’s national greenhouse gas inventory

v2007okMAAMYKMP

Mitigation of greenhouse gas fluxes from cultivated organic soils by raised water table

Cultivated organic soils are a remarkable source of greenhouse gases (GHG) in some countries and raised ground water table has been suggested as a mitigation measure on these soils. Drainage of the peat increases mineralization of the organic matter and causes high emissions of carbon dioxide (CO2) and nitrous oxide (N2O) while emissions of methane (CH4) are lowered compared to pristine peatlands. In countries with a large area of organic soils these GHG emissions can be remarkable. In Finland, the area of cultivated organic soils is 12% of the agricultural area but they cause 30% of the N2O emissions of agricultural soils reported under the Climate Convention of the UNFCCC. Organic croplands are also the largest single emission source of CO2 among the emissions reported in the land use sector

Biohiili-turveseos kaasumaisten päästöjen vähentäjänä

Esitelmä201

Buffer strips as filters for nutrients from grazed lands and nutrient cycling on the buffer strips

The retention of agricultural nitrogen and phosphorus by 10-m-wide grass buffer strips and buffers under natural vegetation has been studied for ten years on an experimental field at Jokioinen