Production abilities and forage quality of selected species of Bromus family in the first year after renovation

摘要

In 2008 a trial was established at the Jevicko site on Fluvisol (345 m above sea level, 7.4°C, long-term rainfall average 545 mm) by a method of quick renovation of permanent grassland with three Bromus species: Bromus inermis Leysser cv. Tabrom (smooth brome), Bromus marginatus Nees es Steud cv. Tacit (mountain brome), Bromus sitch-ensis Trin. in Bong cv. Tambor (Alaska brome). The trial was fertilized with N 180 kg ha~(-1) in the form of ammonium nitrate with lime, 35 kg ha~(-1) P and 100 kg ha~(-1) K; four-cut utilization, first cut on 29 April, then 45 days between cuts. Dry matter production in the first utilization year 2009 reached 14.12 t ha~(-1) for smooth brome, 17.67 t ha~(-1) for mountain brome, and 16.86 t ha~(-1) for Alaska brome. Thequality of forage dry matter in 2009 was evaluated by NIR Systems 6500. The parameters measured were crude protein, fibre, NEL (net energy of lactation), NEF (net energy of fattening). The objective is to compare production abilities and forage qualityof three Bromus species in the conditions of the Czech Republic.