Turkish Journal of Field Crops

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EFFECTS OF SEED DENSITY AND SEED QUALITY OF WHEAT CULTIVARS ON THE GROWTH AND DEVELOPMENT OF WEEDS

M. H. GHARINEH', K. GHASSEMI-GOLEZANI, A. BAKHSHANDEH', A. JAVANSHIR , M. VALIZADEH

Abstract

The effects of the density and quality of the seeds of wheat cultivars were studied in. two field experiments at Ahwaz Agricultural Research Station (Ramin). In these experiments, the height, density and dry weight of weeds were affected by the density and quality of the wheat seeds. The growth and yield of wheat were also measured in order to evaluate the indirect influence of seed quality on the growth of weeds. The results indicated, that the maximum number of weeds (105.6 weeds m3) could be observed in the treatment with low seed density (200 seeds m2). The minimum number of weeds (42.5 weeds m2) was measured when the high density of wheat seeds was increased. Moreover, the leaf area index, number of tillers, number of spikes and yield components of wheat increased with an increase in the density of wheat seeds. A similar effect to that observed for seed density also holds good for the effect of wheat seed quality. It was concluded from the results that the growth of weeds could be controlled by the quality and density of wheat seeds and could consequently improve the efficiency of chemical control programes.

Keyword: seed, seed quality, drought stress, density, seed maturity stages, weeds ,
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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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