The Mineral Content of Forage Affected by Previuos Grazing Intensity

PAVLŮ, K., HOMOLKA, P. & PAVLŮ, V. Obsah minerálních látek v píci ovlivněný předchozí rozdílnou intenzitou pastvy. In XI. Kábrtovy dietetické dny. Brno: Veterinární a farmaceutická univerzita, 2015, s. 29-33.{INTLINK}
PAVLŮ, K., HOMOLKA, Petr a PAVLŮ, V., 2015 The Mineral Content of Forage Affected by Previuos Grazing Intensity. In XI. Kábrtovy dietetické dny. Brno: Veterinární a farmaceutická univerzita, s. 29-33. ISSN
Year2015
CathegoryOthers
Internal link15201.pdf
Abstract

The mineral content of grassland is one of the key factors that determine its quality. The aim of the study was to determine the optimal interval for the grazing and the optimal interval for the hay harvest in relation to the nutrient requirements for cattle and determine the dynamics of pasture forage yield and mineral content during the growing season. Intensive or extensive grazing in the previous grazing season significantly affected the content of minerals and biomass yields. Especially at the beginning of the growing season the contents of N, Ca and Mg were higher in forage, which was in previous years, intensively grazed. After that, the differences between these two treatments were not significant. Diverse grassland with a higher proportion of herbs contained higher levels of calcium and magnesium. Because of lower K concentrations and higher Ca and Mg concentrations in the fodder there was no problem with tetanus ratio (K/Ca + Mg) by exceeding the limit value of 2.2. The present work shows that the optimal term for hay in mesophilic upland grassland the end of May to mid-June. In this time historically the first cut was conducted. After this period there are revealed such changes in the content of minerals, which significantly deteriorate the forage quality. Therefore, if the first cut after mid-June is postponed then compensatory payments under environmental schemes should progressively compensate financially losses.