Saeid Hazrati; Amir Reza Sadeghi-Bakhtvari; Davood Kiani
Abstract
The present study aims at evaluating the effects of leaf foliar of growth regulators and nitrogen on growth parameters and yield of spring safflower. To do so it has carried out a research at East Azerbaijan Agricultural Research Center as a factorial experiment based on RCBD (Randomized Complete Block ...
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The present study aims at evaluating the effects of leaf foliar of growth regulators and nitrogen on growth parameters and yield of spring safflower. To do so it has carried out a research at East Azerbaijan Agricultural Research Center as a factorial experiment based on RCBD (Randomized Complete Block Design) with three replications. The factors include growth regulators in four levels, namely auxin, cytokinin, auxin + cytokinin (wherein the treatment’s concentration has been 1000 mg/L), and control (no use of growth regulator, whatsoever), foliar application of nitrogen (3 and 6 per thousand), and two springcultivars (Soffe and Goldasht). Results show taller plants (17%) and greater number of heads per plant (39%), seeds per head (9%), and lateral stems (37%) for Soffeh cultivar, compared to Goldasht variety. On the other hand, Goldasht cultivar provides the maximum head diameter (15%) and 1000 seed weight (47%), in comparison to Soffeh cultivar. The maximum grain yield is observed for Soffeh cultivar with auxin growth regulator and a concentration of three per thousand foliar application of nitrogen (3205 kg ha -1),displaying no significant difference from either the control or the application of three per thousand foliar of nitrogen (3120 kg ha-1). The application of growth regulators has changed the fatty acid composition. The application of auxin + cytokinin as the growth regulator with a concentration of three and six per thousand foliar of nitrogen increase the oleic, palmitic, and linolenic acids. However, the use of auxin and cytokinin separately increase linoleic and stearic acids among the fatty acids, compared to the control, which is higher in Soffeh cultivar than Goldasht. In general, Soffeh cultivar shows higher growth and yield, compared to Goldasht cultivar, indicating the positive effect in foliar application of hormones and nitrogen for the latter.
Fariborz Zaare-Nahandi; Nilufar Mohamadi Silabi
Abstract
Flowering and fruit production of ‘Nagami’ kumquat is somewhat different from other citrus species because usually have three flowering peak in a year which can lead to producing fruits with different quality on a tree. Considering the proper effect of paclobutrazol on raising citrus flowering, ...
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Flowering and fruit production of ‘Nagami’ kumquat is somewhat different from other citrus species because usually have three flowering peak in a year which can lead to producing fruits with different quality on a tree. Considering the proper effect of paclobutrazol on raising citrus flowering, a pot experiment with three levels of paclobutrazol (zero, 0.1 and 0.5 g ai per tree) and six replications was conducted as a complete randomized block design. The results showed that paclobutrazol had effective effect on kumquat flowering and fruit set. Effect of paclobutrazol on shoot growth before and after the flowering period and the number of shoots after flowering period was significant and led to reducing them. All paclobutrazol treatments led to early flowering, increasing the number of first and second flower flush and fruit production. In terms of fruit quality, significant decrease in the length, diameter/length ratio and acidity of fruits was observed. In general, paclobutrazol caused a marked increase in fruit production of ‘Nagami’ kumquat, while retained most of the desirable traits of fruit.
ali naderi arefi; mohammad abedini esfahlani
Abstract
To determine the best planting date and irrigation schedule in a cotton field (Gossypium hirsutum var.Varamin) in Garmsar region an experiment was conducted in 2011. The experimental design was splitplot based on randomized complete block with three replications. Three irrigation termination dates (2011Sep ...
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To determine the best planting date and irrigation schedule in a cotton field (Gossypium hirsutum var.Varamin) in Garmsar region an experiment was conducted in 2011. The experimental design was splitplot based on randomized complete block with three replications. Three irrigation termination dates (2011Sep 11th, 2011 Sep 21st and 2011 Oct 2nd) arranged in main plots as main factor and three planting dates(2011 May 10th, 2011 May 25th and 2011 Jun 9th) located in sub plots. During the growth season,phonological events such as germination, date of flowering, date of boll formation, boll opening, maturityand after harvest attributes such as plant tall, number of boll per plant and weight of boll were recorded.The result showed that effect of planting date on seed cotton yield, plant/m2, boll per plant and plantsheight was significant but boll weight was not affected significantly by this treatment. First planting dateand first irrigation termination date with 7729 kg/ha of seed cotton yield is the best treatment. Because ofstable environmental conditions in years of experiment, the effect of these treatments on studiedtreatments is not significant. Totally, two first planting dates has the higher yield than third and first dateof irrigation termination is the best because of decreasing the number of irrigation.