In a dry region of Oberwallis (Martisberg) changes in the vegetation of permanent grassland were observed during eight years following the introduction of spray irrigation. Botanical records on eleven plots of 25 m2 show that no fundamental changes occurred from 1988 to 1996. On the most fertile and freshest meadows the number of species slightly decreased and the proportion of good fodder plants increased after the introduction of irrigation. On the driest plots which have not been irrigated the vegetation has not changed. More evident changes following the introduction of irrigation were observed on meadows with an intermediate botanical composition compared with the two previous types. Year by year their botanical composition developed towards that of the most fertile and freshest meadows. These botanical changes do not lead to a decrease in the botanical diversity, but the fodder value of these meadows increases.
Stucky T., Hochstrasser M., Meyer S., Segessemann T., Ruthes A. C., Ahrens C. H., Dahlin P., Pelludat C.
The root knot nematode (RKN) Meloidogyne incognita causes damage in field and greenhouse crops. Agroscope researchers have developed a new screening test to identify bacteria that antagonise this agricultural pest.
With CULTAN fertilisation, nitrogen is injected into the soil as an ammonium solution. Multi-year trials conducted by Agroscope show that this method reduces nitrogen leaching by an average 38% without negatively affecting yields.
Tuta absoluta is one of the most destructive pests of solanaceous crops. Agroscope has developed a statistical model to study the population dynamics of the pest and its parasitoids and allows interventions to be optimally planned.