A. Sadeghi -Bakhtouri; H. Mohammadi; Bahman Pasban Eslam
Abstract
In order to investigate the effect of nitrogen and plant spacing on phenological characteristics, morphology, and fruit yield in pumpkin (Cucurbita pepo L.), an experiment was conducted at the farm of Agriculture Faculty, Azarbaijan Shahid Madani University, during 2013. The study was performed as factorial ...
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In order to investigate the effect of nitrogen and plant spacing on phenological characteristics, morphology, and fruit yield in pumpkin (Cucurbita pepo L.), an experiment was conducted at the farm of Agriculture Faculty, Azarbaijan Shahid Madani University, during 2013. The study was performed as factorial in a complete randomized block design with three replications. The treatments consisted of nitrogen at five levels (0, 50, 100 and 200 Kg ha-1) and plant spacing with a square array at three levels (30, 60 and 90 cm). According to the results, the planting time until flowering and fruiting was longer in the treatment of 200 kg N. The number of nodes, sub-branches, and leaves per plant was higher in the planting space of 90 cm along with 200 Kg ha-1 nitrogen. The higher plant length and fruit yield were recorded for the planting space of 60 cm along with 150 Kg ha-1 nitrogen. The highest leaf dry weight was related to the 200 Kg ha-1 nitrogen. The use of 150 Kg ha-1 nitrogen caused to the highest number of male and female flowers, fruit fresh weight, number of seeds per fruit. The higher leaf dry weight, male and female flowers, and fruits per plant were obtained in the planting space of 90 cm. Finally, the application of 150 Kg ha-1 nitrogen and planting space of 60 cm led to the highest number of fruits and fruit yield in unit area.
A. Hassanzadeh; M. Heidari; H. Khoshghalb; H. Ghorbani Ghozhdi
Abstract
In order to study the effect of different amounts of nitrogen fertilizer and foliar application of boron on some physiological traits in karela plants (Momordica charantia L.), a factorial experiment in a randomized complete block design with three replications was conducted at the Sharood University ...
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In order to study the effect of different amounts of nitrogen fertilizer and foliar application of boron on some physiological traits in karela plants (Momordica charantia L.), a factorial experiment in a randomized complete block design with three replications was conducted at the Sharood University of Technology in 2013. The treatments consisted of three levels of nitrogen fertilizer: 75, 150 and 225 kg N.ha-1 (urea source) as the first factor and four foliar applications of boron including: 0, 1, 2 and 3 g per liter of boric acid as the second factor. The traits measured in this study included the length and diameter of fruit, fruit yield, chlorophyll "a","b", and carotenoids, the conent of sugar nitrate and nitrate reductase enzyme activity. The results showed that, nitrogen fertilizer except diameter of fruit had significant on all of attribute traits. Foliar application of boron in this study had significant effect on fruit yield, the content of chlorophyll "b" (P<0.05) in leaf, sugar and the amont of nitrate in leaf and fruit (P<0.01). Interaction between nitrogen fertilizer and foliar application of boron had significant effect on fruit yield and leaf nitrate content. The results showed that the highest fruit yield was obtained at 150 kg N.ha-1 and 2 g per liter of boron. In addition, the highest amount of nitrate in leaf and fruit tissues was obtained at 225 kg N. ha-1 treatment. Finally, 150 kg N. ha-1 fertilizer and 2 g per liter of boron was identified as the best treatment to obtain maximum yield and fruit quality.
