Evaluation of seven cultivars of Cynodon spp. under simulated grazing conditions.

This rotation pasture study was conducted in the experimental fields of Field Crops Department of Agriculture Faculty in Ege University, Bornova, Izmir-Turkey under Mediterranean climatic conditions in the years 2004/05. Two grasses (Festuca arundinacea and Cynodon dactylon) and three legumes (Medicago sativa,Trifolium repens and Lotus corniculatus) were sown at different rates of mixtures in the same or alternate rows. Finally, they were compared under cutting or grazing regimes. F. arundinacea and M. sativa mixture was the most favourable alternative both under cutting (15.71 t ha-1 dry matter and 3.78 t ha-1 crude protein) and grazing (15.14 t ha-1 dry matter and 3.46 t ha-1 crude protein) practices. Furthermore, average yield performance of grazing treatments was higher than cutting in both years (12.44 t ha-1 dry matter and 18.73% crude protein). Mixture of Cd + Fa + Tr also displayed promising performance. However, this study suggests that further investigations has to be done for more detailed information. Key words: Pasture mixture, sowing technique, grazing, cutting.

Festuca arundinacea

10.5897/ajb10.1249

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Productivity and persistence of 4 lucerne varieties under grazing conditions.

J. A. Josifovich S. Solá J. Maddaloni

Persistence (discontinuity)

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Scaling issues in the interpretation of dry matter yield differences among perennial ryegrass (Lolium perenne) cultivars

Journal of New Zealand Grasslands (2019)

D. F. Chapman G.P. Cosgrove B. Kuhn-Sherlock D.R. Stevens Julia M. Lee

Perennial ryegrass breeding is estimated to be delivering rates of genetic gain in dry matter (DM) yield of 50â€“60 kg DM/ha per year of breeding effort. These estimates are based on DM yield data from tightly managed small-plot trials which are not necessarily representative of typical farm management. To assess the possible realised (on-farm) DMY gains from breeding, seasonal DMY data were collected contemporaneously at two â€˜scalesâ€™ of evaluation for eight perennial ryegrass cultivars over a total of 14 seasons (comprising 5 â€˜seasonsâ€™ in each of three years excluding the first winter) in each of four regions. The scales were denoted â€˜small plotâ€™ (SP, 10 m2, perennial ryegrass monocultures only) and â€˜large plotâ€™ (LP, 65â€“90 m2, subject to more intensive dairy cattle grazing and including all combinations of two nitrogen fertiliser rates with or without white clover as treatments). Relationships between DMY measured in SP versus LP were statistically significant (P<0.001) for all combinations of region, N fertiliser level and clover presence/absence, indicating good general agreement in cultivar performance trends. However, the slope of the relationship (range 0.492 to 1.171, mean 0.733) was significantly less than 1 in three-quarters of the region by treatment combinations. The slope was closely and inversely related to the size of the difference in total N supply between and SP (N from fertiliser only) and LP (where N was supplied as fertiliser at a lower rate but included biological fixation): the smaller the difference in N supply between the two â€˜scalesâ€™, the greater the slope. Estimated realised DMY differences between cultivar ranking positions on New Zealand dairy farms under future projected N fertiliser rates were in the range 0.7â€“0.8 of those predicted from the SP scale of evaluation.

10.33584/jnzg.2019.81.410

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Results of six-year experiments in the improvement of meadows on the lower Oder.

Landwirtschaftliche Jahrbucher (1940)

A. Koenekamp G. Mueller

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Study of the yield of some species and varieties of forage grasses.

P. Plancquaert

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