Comparison of Productivity and Quality of Three Perennial Ryegrass Cultivars and Their Mixture in Response to Nitrogen Fertilization and Grass-Legume Mixtures
2024
Gintarė Šidlauskaitė | Monika Toleikienė | Žydrė Kadžiulienė
We conducted a four-year cutting experiment on herbage yield, with three years focused on testing the effect of perennial ryegrass (PR) cultivars &lsquo:Elena DS&rsquo:, &lsquo:Raminta&rsquo:, and &lsquo:Verseka&rsquo:, along with a cultivar mixture and compositions with white clover (WC) and red clover (RC) diversity, on crude protein (CP), modified acid detergent fibre (MADF), neutral detergent fibre (NDF), water-soluble carbohydrates (WSC), and dry matter digestibility (DMD) content. PR cultivars and cultivar mixtures were sown alone (N150), and the PR &lsquo:Elena DS&rsquo: and PR cultivar mixtures were also sown with each WC, or WC and RC (N0). The average four-year herbage productivity was the lowest in PR &lsquo:Elena DS&rsquo: the and cultivar mixture/WC, followed by all of the pure PR swards, and the highest in PR &lsquo:Elena DS&rsquo: and the cultivar mixture/WC+RC: however, the PR &lsquo:Elena DS&rsquo:/WC+RC mixture had the highest legume proportion and CP content. There was less NDF but also WSC in swards with legumes, but higher CP content than in pure PR swards: however, the highest CP content was in mixtures with RC. Among the grasses, PR &lsquo:Verseka&rsquo: had lower NDF contents and a higher WSC than PR &lsquo:Elena DS&rsquo:, &lsquo:Raminta&rsquo:, and the cultivar mixture. Overall, this study revealed significant differences in the productivity of PR cultivars with a potential yield difference of up to 1.7 t ha&minus:1.
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