Yaser Javan; Mohammad Javad Nazarideljou
Abstract
Introduction: Cucumber (Cucumis sativus L.) is an important fruit crops and cultivation in soilless condition may help to improve the quality and productivity. Due to susceptibility of cucumber to climate condition, the cultivation should be done under precise consideration. Nutrient uptake by plant ...
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Introduction: Cucumber (Cucumis sativus L.) is an important fruit crops and cultivation in soilless condition may help to improve the quality and productivity. Due to susceptibility of cucumber to climate condition, the cultivation should be done under precise consideration. Nutrient uptake by plant is greatly affected by the concentration, as well as by the elements ration, especially the cations. Calcium and potassium play an important role in crops biology, functions, quality, and productivity. This experiment was conducted to evaluate the effect of different K: Ca ratios on quality and productivity of cucumber cv. ‘Negin’ to determine the best K: Ca ratio.
Material and Methods: This experiment was done in a hydroponic greenhouse with polyethylene cover. Day/night temperatures were 26±2 and 19±2, respectively. Relative humidity was adjusted at 55-60%. A pot experiment was conducted based on completely randomized design with three replications (9 plants/rep). Treatments included K: Ca ratios (2, 1.5, 1, 0.7, and 0.5). Cucumber cv. ‘Negin’ was treated with above-mentioned K: Ca ratios in an open soilless system equipped with drippers and plants were fertigated basis on Steiner nutrition formula. The culture medium was coco-fibre: perlite (1:1 v/v). Morpho-physiological, as well as biochemical parameters of cultivated plants including, plant fresh and dry weigh, leaf area, root volume, fruit length and weight, total carbohydrates, total phenol, vitamin C content, and fruit yield were determined.
Results and Discussion: Results indicated that morpho-physiological and biochemical parameters, also, plant fresh and dry weight of cucumber cv. ʽNegin’ were significantly affected by application of different K: Ca ratios in nutrient solution (P
Mohammad Javad Nazari Deljou; Neda Allahverdizadeh
Abstract
To study the effect of foliar application of humic acid on morpho-physiological traits, nutrients uptake and postharvest vase life of cut marigold, an experiment was conducted with five levels of humic acid (0, 250, 500, 750 and 1000 ppm) based on completely randomized design with three replications. ...
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To study the effect of foliar application of humic acid on morpho-physiological traits, nutrients uptake and postharvest vase life of cut marigold, an experiment was conducted with five levels of humic acid (0, 250, 500, 750 and 1000 ppm) based on completely randomized design with three replications. Based on the results, in compared with control, leaf number and leaf area, total phenol and aerial and root dry weight significantly influenced by humic acid. Accordingly, the highest flower number in compare with control plants was observed in 250 and 500 ppm concentrations. Also, foliar application of humic acid showed a significant effect on phosphorous and calcium uptake (P
