A three years study was carried out in two experimental sites to analyse the influence of increasing nitrogen fertilisation on baking quality parameters of wheat. Varieties of various quality levels were studied. An increasing nitrogen fertilisation had a positive impact on the majority of the quality parameters. Yield, protein content and quality increased, as well as grain hardness. The nitrogen content per grain, but also in the straw, was more important with the higher nitrogen applications. Dough stability to kneading increased and loss of consistency decreased. Water absorption was optimal at approximately 145 units of nitrogen. The nitrogen fertilisation tended to increase maximal gelatinisation as well as tenacity and the relationship between tenacity and extensibility of the dough. Varieties of diverse quality levels mostly reacted the same way. The variety determines the quality index, but the nitrogen fertilisation influences positively its various components. The marginal profit of quality and yield in grains decreased with each additional nitrogen contribution.
Spring J.-L-, Zufferey V., Verdenal T., Reynard J.-S., Lorenzini F., Bourdin G., Blouin A., Carlen C., Jermini M., Morisoli R., Ferretti M.
Five Merlot clones bred in Switzerland are currently being distributed by the certification sector. A multiyear trial conducted by Agroscope in Gudo (Canton of Ticino) has made it possible to compare them with French and Italian reference clones and to highlight their very good performances.
Arbuscular mycorrhizal fungi are important for healthy soils and crops. A pan-European study shows that plant-protection products adversely affect these fungi, reducing their ability to supply plants with phosphorus via their roots.
Birdsfoot trefoil and sainfoin are used in mixtures for perennial hay meadows and for tannin-containing fodder. Agroscope is adding two new cultivars of birdsfoot trefoil to the ‘List of Recommended Varieties of Forage Plants’, whilst there is no change in the case of sainfoin.