Yielding of grass cultivars in pure stands and phenologically different meadow mixtures in the first year of utilization

摘要

The objective of this study was to estimate yielding of fourteen Polish cultivars of three tall-growing grass species - Dactylis glomerata, Festucapratensis, Phleum pratense and three short-growing grass species - Lolium perenne, Festuca rubra and Poapratensis, in pure stands and two mixtures with different heading dates. The studies were carried out in central Poland in 2011 on a mineral brown soil. The experiment was designed as a randomized complete block with four replications. Three cuts were made with the first one when the individual cultivars in pure stands and the dominating cultivars in the mixtures headed. Dactylis glomerata cv. Amera and the cultivars of P. pratensis headed first, whereas the cultivars of Ph. pratense were the latest (13 days of difference). There were significant differences in DM yield - larger between species and smaller between cultivars. The yields among cultivars of tall grasses were similar, while greater differences were observed between cvs of short grasses. The productivity of the early mixture was slightly better than the mid-early on all harvests. The yield of mixtures was determined by L. perenne, F. pratensis and D. glomerata dominated in sward.