Trädans betydelse i odlingssystemen och dess effekter på näringsutlakning
For more than 10 000 years ago man turned from being a hunter to conduct agriculture. Agriculture has since then developed and from the Stone Age until today four different crop cultivation systems can be distinguished; slash and burn farming, agricultural mower, agricultural crop rotation and ag...
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| Formato: | M2 |
| Lenguaje: | sueco Inglés |
| Publicado: |
SLU/Dept. of Soil and Environment
2017
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| Materias: |
| Sumario: | For more than 10 000 years ago man turned from being a hunter to conduct agriculture.
Agriculture has since then developed and from the Stone Age until today four
different crop cultivation systems can be distinguished; slash and burn farming, agricultural
mower, agricultural crop rotation and agricultural industry. The fallow in
agriculture was introduced around the younger Iron Age. Bare fallow, green fallow
and stubble fallow are common fallow in today's agriculture. Of all arable land in
Sweden, 6.5 percent was fallow in 2016. The green fallow, especially perennial green
fallow with flowers, is good for biodiversity. A green fallow also has a low nitrogen
leakage compared to bare fallow. The bare fallow can have twice as high nitrogen
leakage than grain cultivation. Nitrogen leakage is for example influenced by soil and
tillage. When the roots of the plants are cut down after harvesting the organically
bound nitrogen is mineralized. Inorganic nitrogen can easily be leached from the
ground if vegetation is missing. Biodiversity and reduced nitrogen leakage are important
for a sustainable agriculture. Therefore, green fallow could be applied next to
the field or on grain farms instead of ley field. |
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