Producción de biomasa y estado nutricional en el primer corte de cultivos forrajeros e corta duración en Asturias

Abstract

Biomass production, soil fertility and nutritional status were determined in the early first harvestproduction of short-term forage crops, in two trials (A =Carreño, Lolium multiflorum, and B = Cudillero,Lolium multiflorum + Trifolium pratense) in the central coast of Asturias. The crops were fertilized withthree different treatments of nitrogen: 0, 40 and 80 units of nitrogen per ha in both trials and in trialB with an additional slurry treatment (110 units of nitrogen per ha) in March 2010, in plots of 100m2 per treatment. In May 2010, among 27 and 30 samples of vegetation per N treatment were randomlycollected. There were not statistically significant differences between the 40 kg N ha-1 and 80kg N ha-1 treatments (although the productions were greater in the treatment with 80 Units of N), butthere were significant differences with the 0 kg N ha-1 and 110 kg N ha-1 treatments in the trial B. Fromthe point of view of the nutritional status of the forage, it is recommended to apply at least 80 kg Nha-1 with the aim to have adequate N values in the forages.