Turkish Journal of Field Crops

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ENHANCEMENT OF CANOLA SEED GERMINATION AND SEEDLING EMERGENCE IN LOW WATER POTENTIALS BY PRIMING

Fariborz Shekari, A. Javanshir, M. R. Shakiba, M. Moghaddm, H. Alyari

Abstract

Germination and emergence of canola (Brassica napus L. cv. Cobra) under stressed environmental conditions such as low water potentials appear to be major obstacles in obtaining suitable stand establishment and subsequent oil production. Priming regimes were evaluated on canola seeds in germination and seedling tests having low water potentials to determine if these solutions could be improve seed and seedling performance. The regimes included KCl, KNO3, polyethylen glycol 6000 (PEG6000) at -1.0 and -2.0 MPa for 2 days at 30°C and distilled water (DH2O) for 24 h at 30°C. Primed and nonprimed control seeds were then germinated in 0, -0.5, -1.0 and -1.5 MPa created by PEG6000 solution. Total percent germination of nonprimed and primed seeds were significantly lesser at low water potentials than 0 MPa. Although seeds primed with KNO3 at -1.0 MPa had significantly higher germination than all other priming regimes tested. including PEG6000 at -1.0 MPa. Also in pot experiment under controlled conditions. priming canola seed with KNO3 at -1.0 MPa for 2 days at 30°C was effective in increasing seedling performance in low soil water potentials.

Keyword: Canola. Sead germination, Cropstand ,
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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
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