Hossein Sadeghi; Hossein Heidari sharifabad; Aidin Hamidi; Ghorban Nourmohammadi; Hamid Madani
Abstract
In order to study the canopy temperature effect on protein and soluble sugar, oil percentage and yield of soybean in different planting dates, an experiment was conducted as factorial based on Randomized Complete Block Design with three replications in Karaj and Moghan areas during 2012-13. The studied ...
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In order to study the canopy temperature effect on protein and soluble sugar, oil percentage and yield of soybean in different planting dates, an experiment was conducted as factorial based on Randomized Complete Block Design with three replications in Karaj and Moghan areas during 2012-13. The studied treatments were included cultivar (‘Williams’ and ‘L17’) and planting date (5th of May, 5th of June and 5th of July). Results showed that the soluble protein content was not affected by studied factors. The highest oil percentage (22.38%) in both areas was related to first planting date, also second and third planting dates with 18.8 and 17.72% respectively were arranged in the next levels. In Karaj area, the maximum rate of soluble sugar (73.17 mg/g grain) was obtained at third planting date but in Moghan area, it (72.12 mg/g grain) was observed at second planting date. Furthermore the highest yield (3679 kg/ha) was attained at second planting date in both areas while also third and first planting dates with 3160 and 3000 kg/ha were putted in the next levels. Results showed that although the oil percentage at 5th of May planting date was higher than the other planting dates, but the rate of yield and soluble sugar were decreased at this planting date, because of encountering the pod set and grain filling stages with higher temperature. So, in order to prohibition of this problem occurrence, it is suggested that soybean doesn’t plant in May and it be postponed until the mid of June.
Hossein Sadeghi; Babak Mirshekarnejhad; Saman Sheidaei; Bita Oskouei
Abstract
To evaluate the germination traits and mechanical damage of soybean seed during processing stages, anexperiment was conducted in a factorial experiment based on completely randomized design with 18treatments at Mazandaran province (Sari) in 2009-10. The experiment factors included different seedprocessing ...
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To evaluate the germination traits and mechanical damage of soybean seed during processing stages, anexperiment was conducted in a factorial experiment based on completely randomized design with 18treatments at Mazandaran province (Sari) in 2009-10. The experiment factors included different seedprocessing stages (before cleaning, after elevator, after pre cleaning, after cleaning, after drying and afterpackaging) and three cultivars (‘Telar’, ‘Sari’ and ‘Line 033’). Results showed that cultivar 033 had thehighest germination percentage (83.5%), germination percentage after accelerated aging (71.6%) andseedling vigor index (12.76) and lowest electrical conductivity (41.73μScm-1gr-1) and it was noticed that‘Telar’ cultivar had the highest cracked seed percentage (10.38). Effect of different seed processing stepswas significant on all traits. So that, the lowest germination percentage (78.36%), highest rate of brokenseed percentage (16.72%) and highest cracked seed percentage (13.55%) was obtained after elevator step.Interaction effect of cultivar × different processing steps were not significant on all traits, but meanscomparison showed that the highest (86.9%) was obtained in 033 cultivar after drying step and lowest(77.8%) germination percentage was attained from ‘Telar’ cultivar after elevator.