Production ability of grasses of higher water-soluble carbohydrate content in mountain production area
Hanzes, L.(Vyskumny ustav travnych porastov a horskeho polnohospodarstva, Banska Bystrica (Slovak Republic) | Britanak, N.Vyskumny ustav travnych porastov a horskeho polnohospodarstva, Banska Bystrica (Slovak Republic) | Ilavska, I.Vyskumny ustav travnych porastov a horskeho polnohospodarstva, Banska Bystrica (Slovak Republic))
During 1997-2001, the production ability of grasses with a higher content of water-soluble carbohydrates was observed. The research was established in 1996 in Poprad region (region of Low Tatras mountain range, the altitude 960 m, cold and humid climatic region with average annual temperature 4 deg C and annual rainfall 950 mm). Cultivars of Lolium multiflorum L. (cv. Jivet), Lolium multiflorum subsp. italicum (cvs. Jiskra, Lubina, cv. Luha and cv. Lolita), Lolium porenne L. (cv. Mustang) and intergeneric hybrids (cvs. Becva and Lofa) were used in the trial. Cultivars were used in the forage crop rotation as follows: spring barley, grasses with higher content of water-soluble carbohydrate and winter wheat. Dose of manure 20-25 t/ha was applied. Swards were cut three-times. The firs cut was done in the beginning of heading, the second cut 4-5 weeks after the first one and the third cut 7-8 weeks after the second one. Analysis of variance was used to evaluate the dry matter production of above-ground biomass. Results showed that the yields of each cultivar depended on the weather. From the viewpoint of grassland production, the highest increase of biomass was recorded in the first cuts (except 2001 year). There were no statistically significant differences between yields of lolioid types of intergeneric hybrids and yields of the other ryegrass varieties. Cultivar Jivet of Lolium multiflorum and cultivar Jiskra of Lolium multiflorum subsp. italicum belong to the relatively most productive cultivars.
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