Turkish Journal of Field Crops

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Effect of Calcium Nitrate Fertilization on Yield and Some Quality Attributes of Potatoes

H. AKDEMİR, M. OKTAY, M. E. IRGET,A. ERDEM, V. CAVUŞGİL

Abstract

This study was conducted to determine the effect of Ca(NO3)2 fertilization on the yield and quality traits of potatoes at Ödemis, Izmir. Asonia, a medium late variety, was grown in Randomized Complete Block Design with four replications. 0-10-20-30 kg/da Ca(NO3)2 (0-2.65-5.30-7.95 kg CaO/da) were applied to the plots. Additionally, 25 kg N/da, 15 kg P2O, /da and 35 kg K2O/da were applied to all blocks. There was a linear increase in accordance with Ca levels in the yield at 7.69, 15.08 and 29.25 % levels respectively, compared to the control plots. Calcium applications resulted in a marked increase in the starch and dry matter contents of the tubers while reducing sugar and calcium contents declined with increasing levels of calcium. The potato chip quality varied significantly among the treatments and it was positively affected by the calcium applications. The Ca applications had no significant effect on the N,P,K and Mg contents of the tubers.

Keyword: Ca(NO3)2 fertilization, yield, quality traits of potatoes ,

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