maryam mansouri; Gholam Akbari; elias soltani; Fatemeh Benakashani
Abstract
This research was carried out in the form of split-split plotin the form of a randomized complete block design with three replications in the year 2021 in the Aburihan campus research farm located in Pakdasht. In this study, irrigation cycle in three levels (once every 7 days, once every 10 days and ...
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This research was carried out in the form of split-split plotin the form of a randomized complete block design with three replications in the year 2021 in the Aburihan campus research farm located in Pakdasht. In this study, irrigation cycle in three levels (once every 7 days, once every 10 days and once every 13 days) as the main factor, planting date in two levels (5 June and 22 June) as secondary factor and fertilizing with bio fertilizers In four level including control (without biofertilizer), Shift biofertilizer, Chris biofertilizer and the combination of Shift and Chris biofertilizers as sub-factors were considered. The results of the research showed that the plants cultivated on June 22 were superior to the plants cultivated on June 5 in all investigated traits (including yield components, seed yield, and biological yield) and in all three tested irrigation levels. The seed yield, under different research treatments, has shown a consistent correlation with the number and weight of seeds. In other words, with increasing levels of drought stress, the seed yield has significantly decreased in both planting dates under investigation. However, the ratio of seed yield reduction under drought stress was significantly lower in plants cultivated on June 22st compared to those cultivated on June 5th.The application of biofertilizers, especially Chris biofertilizer, significantly reduced the effects of stress on grain yield, biological yield, and oil percentage in seed Niger
Maryam Mansori; Gholam Abbas Akbari; Seyad Mohammad Mahdi Mortazavian
Abstract
To evaluate the effect of foliar application of nano-particles of titanium dioxide on yield and yield components of ecotypes of cumin under drought stress conditions, a split-split plot experiment was carried out based on a randomized complete block design with three replications, during 2014-2015 at ...
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To evaluate the effect of foliar application of nano-particles of titanium dioxide on yield and yield components of ecotypes of cumin under drought stress conditions, a split-split plot experiment was carried out based on a randomized complete block design with three replications, during 2014-2015 at the research farm of Aburaihan Campus, University of Tehran at Pakdasht. Treatments were consisted of water stress at three levels (full irrigation throughout growing season, water stress at vegetative and reproductive stages), spraying of nano-particles of titanium dioxide at three levels (no spray, spraying with concentration of 0.015 and 0.03 percentages) and also ecotypes of cumin from nine regions. Based on the obtained results the highest grain yield was belonged to Ardakan-Yazd in normal irrigation and spraying of nano-particles at concentration of 0.03 percent with an average of 194.05 grams per square meter, compared to non-sprayed treatment in which 17 percent lower grain yield was obtained. The highest grain yield also was observed at stress conditions in reproductive phase for ecotype of Maneh of North Khorasan at spraying of 0.015 percent of nano-particles with an average of 45.89 grams per square meter, when compared to the control (no spray) in which 16 percent lower grain yield was obtained. Ecotypes also showed significant differences at level of one percentage in terms of responses to drought stress. Based on the obtained results from spraying of nano-particles at a concentration of 0.03 percent, the negative effects of drought stress were reduced and this treatment prevented from huge yield loss under stress.