Effect of different agronomical measures on yield and quality of autumn saved herbage during winter grazing - 1st communication: yield and digestibility of organic matter.

摘要

The objective of this paper was to determine the effect of interactions and different agronomical measures on the autumn saved herbage of different sites in Central Europe (Czech Republic, Germany, Hungary and Poland). Within the different sites, the effect of the pre-utilization factors (accumulation since June, July or August) and winter harvest date (November, December or January) on the dry matter (DM) yield and digestibility of organic matter (DOM) was investigated over 3 consecutive years. All the results were examined by analysis of variance, and least-significance differences (LSD) were calculated (with P<0.05). For all years, the date of winter harvest was the most important source of variance. The highest yields were attained in November (varied from 2.3 to 0.8 t/ha) and the lowest in January (from 1.5 to <0.2 t/ha). The highest DOM concentration (from 70.4 to 52.4% of dry matter) was obtained in November, and it decreased until January (from 59.6 to 35.2% of dry matter). Predominantly caused by the prevailing climatic conditions, the DM yields of the sites varied considerably during winter, showing a significance for the interaction winter harvest date x site as well as for the factor site. The utilization of autumn saved herbage, pre-utilized in July, might be the best opportunity providing an adequate quantity and DOM for suckler cows until the end of the year, but the prevailing climatic conditions at different sites in Central Europe finally decided on the practicability of winter grazing..