Evaluation of sunflower grain yield components under different levels of soil water stress in Azerbaijan

Abstract

In order to study yield and yield components of sunflower landraces under water deficit conditions, an experiment was conducted in the experimental field of Agricultural Research Center, West-Azerbaijan in 2012-2013 cropping seasons. The selected genotypes were evaluated in a rectangular 7 ? 8 lattice design with two replications. They were treated by three irrigation scenarios including optimum irrigation, moderate stress and severe stress where irrigation was done after depletion of 50%, 70% and 90% of available water, respectively. A number of 56 confectionary sunflower landraces were investigated in this experiment. The results of combined analyzes showed that the single and combined effect of water treatments and genotypes on the majority of traits under study were significant. With increasing the severity of drought stress, grain yield, kernel to grain ratio, number of seeds per head, head diameter, 1000-seed?s weight, biological yield and harvest index decreased while the hollowness percentage increased. Among the studied landraces, the highest grain yield was obtained from 'Angane 4' in optimum irrigation condition whereas in moderate and severe stress, 'Garagoz 1' and 'Salmas-Sadaghian' produced higher grain yield than the other landraces, respectively. At each level of irrigation, genotypes had different responses so that the suitable genotypes could be chosen for different conditions.

The acquisition of boron tolerance by salt pretreatment in two sunflower cultivars

“…Sunflower (Helianthus annuus L.) is one of the most important and largest sources of agricultural oil-seed crops in the world due to its high content of unsaturated fatty acids (Gholinezhad et al, 2015;Umar et al, 2019).…”

“…Sunflower (Helianthus annuus L.) is one of the most important and largest sources of agricultural oil-seed crops in the world due to its high content of unsaturated fatty acids (Gholinezhad et al, 2015;Umar et al, 2019). While the world sunflower production shows a fluctuating pattern since 2010, reports show that approximately 47 million tons of sunflower seeds were produced in 2016 (http://www.fao.org).…”

EVALUATION OF MALE INBRED LINES OF SUNFLOWER (Helianthus annuus L.) FOR RESISTANCE TO DROUGHT VIA CHLOROPHYLL FLUORESCENCE

“…Sunflower (Helianthus annuus L.) is the main source of unsaturated vegetable oil and one of the most important agricultural crops in the world (Baloglu et al, 2012;Gholinezhad et al, 2015;Langeroodi et al, 2015;Kaya et al, 2015). Sunflower is the 3 rd oil crop in the world cultivating in over 25 million ha with over 40 million tones production.…”

“…Plants in the arable lands mainly suffer from (i) terminal drought, increasing towards the end of the growing season; and (ii) intermittent or transient drought, breaking rainfall or insufficient rains during the growing season (Toker and Mutlu, 2011). Sunflower (Helianthus annuus L.) is the main source of unsaturated vegetable oil and one of the most important agricultural crops in the world (Baloglu et al, 2012;Gholinezhad et al, 2015;Langeroodi et al, 2015;Kaya et al, 2015). Sunflower is the 3 rd oil crop in the world cultivating in over 25 million ha with over 40 million tones production.…”