Turkish Journal of Field Crops

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EFFECT OF CUTTING HEIGHTS ON THE TURF AND PLAYING QUALITY TRAITS OF SOME TURF ALTERNATIVES IN A MEDITERRANEAN ENVIRONMENT

Ali SALMAN, Behcet KIR , Riza AVCIOGLU

Abstract

The purpose of this study was to detect the agronomic and sports field characteristics of some turf type tall fescue and traditional cool season sports turf mixture mowed at different heights in a Mediterranean environment. The trial was carried out in the experimental fields of Bayindir Vocational School, Izmir (Turkey), using three different turf alternatives under 12, 22 and 32 mm mowing height regime. Visual turf quality, texture and weed invasion traits were determined and shock absorption and vertical deformation were also measured as playing quality parameters for sports turf. Turf alternatives of tall fescue except traditional cool season sports turf mixture showed an adaptation to low mowing height which increased shoot density and promoted a finer leaf texture. Shock absorption and vertical deformation traits were significantly affected by mowing heights; the highest value was recorded for the lowest mowing heights. Nevertheless, a good sports field quality was determined for the tall fescue and tall fescue + perennial ryegrass plots. The results of the present work showed that tall fescue, if maintained at low mowing height regime, could provide a dense and fine textured turf suitable for sport fields with a high visual turf quality

Keyword: Mowing regime, perennial ryegrass, sports field turf and quality, tall fescue ,

Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Erdal GONULAL, Suleyman SOYLU, Mehmet SAHIN

Abstract

A field experiment was conducted in the Wielkopolska region at the Gorzyń Research Station, Poland (52.34°N, 15.54°E) in Central Europe. The study was conducted over a 3-year period (2017, 2018, 2019) as a two-factorial design with four replications in the RCBD. The aim of the research was to determine the effect of the cultivar (‘Bolero’, ‘Tytan’) and the inoculation (Nitragina–seeds inoculation, Nitroflora I–seeds inoculation, Nitroflora II–soil inoculation, HiStick® Lupin–seeds inoculation) on plant development, seeds chemical composition and yielding of narrow-leaved lupin. The weather conditions and experimental factors significantly influenced on productivity of narrow-leaved lupin ‘Tytan’. Drought during the growing season reduced seeds and protein yields. After inoculation of HiStck the seeds yield was significantly greater by 12.4% (p < 0.01) and the protein yield after application of Nitroflora I or HiStick by 13.9% (p < 0.01) and 19.2% (p < 0.01), respectively. Correlation coefficients showed strong relations between number of pods and seeds per plant in both cultivars regardless of the inoculation variant, however the strongest relations in both cultivar were proved on HiStick treatment.
Keyword: Biological nitrogen fixation, chemical composition, legumes, protein efficiency, yielding