Farideh Sadeghi; Yousef sohrabi; Adel SioSe Mardeh
Abstract
In order to study the effect of cytokinin, gibberellin, and cycocle on yield and yield components of two wheat cultivars under different irrigation regimes, a study was conducted as a split-split experiment based on a randomized complete block design with three replications at the Agricultural Research ...
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In order to study the effect of cytokinin, gibberellin, and cycocle on yield and yield components of two wheat cultivars under different irrigation regimes, a study was conducted as a split-split experiment based on a randomized complete block design with three replications at the Agricultural Research Station of Kurdistan University in 2016. There, the irrigation factor at four levels: dryland, irrigation at booting stage, irrigation at booting + flowering and irrigation at booting + flowering + grain filling stages have served as the main plots, two wheat cultivars (Sirvan and Homa) as sub-plots, and levels of plant growth regulators foliar application including, i.e. control, gibberellin (100 µm), cytokinin (100 µm), and cycocel (3gr. lit-1) at the wheat stem elongation and grain filling stages as the sub-sub plots. Results show that in the foliar application during the stem stage, compared to the dryland treatment, yield increase in one, two, and three irrigation treatments have been 29%, 33%, and 43%, and at the grain filling stage; 22%, 28%, and 33%, respectively. Homa cultivar produced higher yield compared to Sirvan. In the foliar application during the stem stage, the highest grain yield (504 g m-2) belongs to application of three irrigation treatments as well as addition of cytokinin, and at the grain filling stage, the highest grain yield (477.6 g m-2) has been obtained from Homa cultivar under three times irrigation condition and cycocel consumption. Therefore, using even one stage irrigation and the application of cytokinin and cycocel can increase the grain yield of wheat.
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.