mohammad kaveh; mohammad ali esmaili; Hemmatollah Pirdashti; Mohammad Reza Ardakani
Abstract
The present study investigates the effect of combined application of biochar, Azospirillium lipofrom bacteria and nitrogen in two flooding and intermittent irrigation methods on yield and yield components of rice (Oryza sativa L. cv. ‘Tarom Hashemi’). The experiment is done in split-split ...
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The present study investigates the effect of combined application of biochar, Azospirillium lipofrom bacteria and nitrogen in two flooding and intermittent irrigation methods on yield and yield components of rice (Oryza sativa L. cv. ‘Tarom Hashemi’). The experiment is done in split-split plot arrangement based on a complete randomized block design with three replications at the research farm of Sari Agricultural Sciences and Natural Resources University between two consecutive years of 2017 and 2018. The treatments are two irrigation methods (flooding and alternation irrigation regimes) as main plot and nine fertilizers levels (100%, 75%, and 50% nitrogen in combination with control (without biochar), 20 and 10 tons of biochar per hectare) and seedling inoculation with Azospirillum lipoferum (inoculation and non-inoculated control) as sub and sub-sub plots, respectively. According to the significance of the studied factors’ effects on the measured traits, application of 20 tons of biochar along with 75% to 100% of the recommended nitrogen show the greatest impact on rice yield and yield components in both intermittent and flooding irrigation methods. Since, the effectiveness of biochar in imtermittent irrigation is more significant, it can be concluded that the application of 20 tons of biochar per hectare plus 75% to 100% of the recommended nitrogen could greatly compensate the yield reduction due to reduced water consumption in intermittent irrigation, compared to the flooding irrigation.
Hamed Hassanzadeh Khankahdani; Abdolhossein Aboutalebi Jahromi; Ebrahim Zakerifard Mollahassani
Abstract
This experiment was performed based on split plot in RCBD with three replications in Minab Agricultural Research Station during two successive years. Main plots were allocated to planting method (basin and furrow) and sub plot to four Onion cultivars (‘Primavera’, ‘White Early Grano ...
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This experiment was performed based on split plot in RCBD with three replications in Minab Agricultural Research Station during two successive years. Main plots were allocated to planting method (basin and furrow) and sub plot to four Onion cultivars (‘Primavera’, ‘White Early Grano 502’, ‘HT3544’ and ‘HT3560’). Nursering was done in October and the transplants were transferred to main land in December. All plots were irrigated based on finding of previous studies. Finally was recorded the characters such as bulb yield, multi-center percent, length and diameter of bulb, bulb shape index, bulb weight and time of bulb producing and harvesting. Results showed that planting method had significant influence on bulb yield. Bulb yield of basin method was 28% more than furrow method and had significant difference together. The greatest bulb yield was observed in ‘HT3560’ cultivar and the least in ‘WEG502’ cultivar without any significant difference. ‘WEG502’ cultivar also was harvested 18 days later than other cultivars in two years and it had multi-center percent more than other cultivars. Generally two new cultivars (‘HT3544’ and ‘HT3560’) were better than dominant cultivated cultivars (‘Primavera’ and ‘WEG502’) in two years of experiment.