A field experiment was conducted during spring and autumn growing seasons of 2009 to study the effect of foliar application of zinc and boron on growth characters, yield components and quality of some sunflower genotypes (Helianthus annuus L.). The experiment was carried out according to the factorial experiment in a randomized completely block design, consisting of three zinc application (0, 6, 12 mg.L -1 ) and three boron application (0, 4 and 8 mg.L -1 ) with three sunflower genotypes (Myogen, Isaanka and Ginmus). The main findings could be summarized as follows:-Foliar application of zinc to the leaves with concentration 12 mg.L -1 showed a significant increase in plant height, stem diameter, leaf area, head diameter, number of seeds head -1 , 1000 seed weight and seed yield.ha -1 , oil percentage, oil, protein yield (ton. ha -1 ), However, protein percent was decreased. Addition of boron sprayed on the plant leaves with concentration 4 mg.L -1 lead to a significant increase in plant height, stem diameter, leaf area, head diameter, number of seeds head -1 , 1000 seed weight and seed yield.ha -1 , oil percentage, oil, protein yield (ton.ha -1 ), while increasing concentration of boron to 8 mg.L -1 caused a significant increase in protein percentage in the two seasons'.Results showed that the Isaanka genotype gave a high values for characters stem diameter, leaf area, head diameter, number of seeds. head -1 , 1000 seed weight and seed yield.ha -1 , oil percentage, oil, protein yield (ton.ha -1 ) in both seasons. The triple interaction among Isaanka genotype × foliar application of 12 mg Zn.L -1 × concentration of 4 mg B.L -1 sprayed on the plant leaves, achieved the highest mean for the characteristics of: plant height, stem diameter, number of seeds head -1 , seed yield.ha -1 and oil, protein yield (ton.ha -1 ) for both seasons. In general, it could be concluded that for maximizing total seed and oil yields per unit area may be achieved by planting Isaanka genotype with adding zinc and boron to the leaves plant with concentration 12 Zn and 4 B mg.L -1 under the environmental conditions of this study.
Two field experiments were conducted for rapeseed crop (Brassica napus L.) during two winter successive seasons 2018-2019, 2019-2020 at AL-Hamdanea location which is far Mosul city about (30km). Each experiment was conducted according to factorial experiment in randomized completely block design with three replications. Its included three plant population (111.110, 166.666 and 333.332 plants. hectar -1 ) with three genotypes of rapeseed crop (Talayeh, Okapi and Rainbow).The results could be summarized as:The plant population of 111.110 plants. hectar -1 gave the highest mean for characters stem diameter, number of primary branches, number of silique / plant, leaf area, number of seed per silique, weight of thousand seed, and oil, protein percentage in 2018-2019, 2019-2020 seasons, While the plant population of 333.332 plants. hectar -1 gave a high mean for plant height in both growing seasons.The genotypes differed significantly in all the related characteristics, the Okapi genotype come over the other genotypes in plant height, stem diameter, number of branches/plant, leaf area, number of silique/plant, number of seed/silique, 1000 seeds weight (g.) seed yield (ton.ha -1 ), oil, protein percentage of seeds and oil, protein yield (ton.ha -1 ) in both growing seasons. The interaction between plant population and genotypes was significant in plant height in both growing seasons.اجمللد ، األساسية لرتبية ا كلية أحباث جملة ( لعدد ا ، لسنة ،)
A field experiment was conducted during the winter season for the years 2018-2019 and 2019-2020 successively to study the effect of foliar application of zinc and boron on growth traits, yield components and quality of three flax genotypes (Lithuania, Ariana and Linot).The experiment included three concentrations of zinc (0,5 and 10 mg zinc/L) and three concentrations of boron (0, 6 and 12 mg boron/L) implemented according to the factorial experiment in a Completely Random Block Design. The main findings could be summarized as follows:-The results indicate that the Lenot genotype gave the highest values for the traits of plant height, stem diameter, number of fruiting branches, number of capsules/plant, number of seeds/capsule, weight of thousand seeds, total seed yield (tons/ha) and oil yield (tons/ha). for seasons 2018-2019 and 2019-2020 respectively.Foliar application with zinc on plant leaves at a concentration of 5 mg zinc/liter led to a significant increase in plant height, number of fruiting branches, number of capsules/plant, number of seeds/capsule, weight of thousand seeds, total seed yield (tons/ha), oil yield (tons/ha) in both growing seasons.Adding boron application on plant leaves at a concentration of 6 mg boron/liter led to a significant increase in plant height, stem diameter, number of fruiting branches, number of capsules/plant, number of seeds/capsule, weight of thousand seeds, total seed yield (tons/ha) and oil yield (tons/ha) for seasons 2018-2019 and 2019-2020, respectively. In general, it can be concluded that the highest total yield of seeds per unit area can be achieved by planting Lenot genotype and adding zinc on plant leaves at a concentration of 5 mg/L and boron at a concentration of 6 mg/L with in Dryland Conditions of this study.
The study included two field experiments for sunflower crop conducted during spring growing season of 2008 in two locations. The first was in AL-Rashidia (20 km) west north Mosul city, the second ones was in AL-Hamdanea (30 Km) east of Mosul city. The main objective was to find out the effect of potassium fertilization levels on growth, yield and quality of three sunflower cultivars. Each experiment was conducted according to factorial experiment in a randomized completely block design with three replications. It included three levels of potassium (0, 30 and 60 kg k per hectare -1 ) were applied to the soil during the sowing period, with three cultivars of sunflower crop (Saturn, Gordis and Majak). The results could be summarized as follows:The cultivar Gordis gave a high level for most growth, yield and quality parameters in both locations. Application of 30 kg K per hectare -1 led to a significant increase in plant height, leaf area, disc diameter, number of seeds per head, weight of thousand seed, seed yield, oil percentage and oil yield, while increasing concentration of potassium up to 60 kg K per hectare -1 caused a significant increase in protein percentage in AL-Rashidia and AL-Hamdanea locations. The interaction between the cultivars and potassium fertilization levels was significant in some growth, yield and quality parameters, the Gordis cultivar with potassium application to the soil with concentration 30 kg k.ha -1 was superior and gave highest values for plant height, stem diameter, leaf area, number of seeds.head -1 , weight of thousand seed, oil percentage, oil yield, protein percentage and protein yield in AL-Rashidia location only, while the interaction between cultivars and potassium fertilization levels was significant in number of seeds per head and weight of thousand seed in AL-Hamdanea location only.
To determine the optimum sowing date and plant population for safflower crop (Carthamus tinctorius L.), a factorial experiment was conducted by using randomized completed block design with three replications in AL-Rashidia location about (20 km) and two plant populations (50000 and 100000 plants.ha -1 ) were selected. Hartinan, Syrian and Gila cultivars were used. The results showed that the different sowing dates had significant effect on growth characters, yield, yield components and quality, except linoleic acid in 2009-2010 season, the highest mean values were obtained at second sowing date in the two seasons . Safflower cultivars significantly differed for all the studied yield, its component and seed quality traits in both seasons, the highest mean values were obtained from Syrian cultivar in both seasons. Seed yield and oil yield influenced by different plant population significantly. Plant population of 50000 plants.ha -1 gave the highest mean for seed oil content and oil yield, while increasing the plant population to 100000 plants.ha -1 caused a significant increase of plant height and palmitic acid percentage in both growing seasons. The result of interaction among sowing dates, cultivars and plant population showed that the highest seed yield was obtained in Syrian cultivar sown in November using plant population of 50000 plants.ha -1 . Therefore, Syrian cultivar sown in November with plant population of 50000 plants.ha -1 is recommended for this region.
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