Vahid Akbari; Rasul Jalili Marandi
Abstract
The water deficiency is one of the serious problems in the arid zones. In order to investigate the effect of Cycocel on different growth aspects of two olive cultivars (Mary and Mission), a greenhouse experiment was conducted using three factors of: cycocel at three levels (0, 500 and 1000 mg L-1), irrigation ...
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The water deficiency is one of the serious problems in the arid zones. In order to investigate the effect of Cycocel on different growth aspects of two olive cultivars (Mary and Mission), a greenhouse experiment was conducted using three factors of: cycocel at three levels (0, 500 and 1000 mg L-1), irrigation of three levels (irrigated at 5, 10 and 15 days intervals) and tow olive cultivars (Mary and Mission) in a factorial experiment based on randomized complete block design of three replicates for the lasted four months. The results showed that both cycocel treatments decreased plant height, increased root length and number of lateral shoots; but no significant difference in stem diameter, leaf numbers, total lengths of lateral shoots, fresh weight of stem and root, chlorophyll b and carotenoid content was observed compared with control. High cycocel level (1000mgL-1) increased fresh weight of leaf and chlorophyll a content than the control. Also, results showed that increased periods of drought have reduced the plant height, stem diameter, leaf numbers, number of lateral shoots and total lengths of lateral shoots, root length, fresh weight of leaf, stem and root, increased chlorophyll a+b and carotenoid content in both cultivars. In above-mentioned parameters Mission cultivar showed higher resistance to drought stress than the Mary cultivar. Results suggested that Cycocel treatment can alleviate some negative effects of drought stress in Mary and Mission cultivars of olive.
Mohammad Ali Khalaj; Mina Amiri; Mohammad Hossein Azimi
Abstract
This experiment was carried out to investigate the effect of different substrate on growth and yield of Gerbera flower. The experiment was performed using 10 treatments as fallow: fine sand, peat +fine sand (%25+%75), peat + fine sand ( %50 +%50), perlite + peat (%75 + %25), perlite + peat (%50 + %50), ...
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This experiment was carried out to investigate the effect of different substrate on growth and yield of Gerbera flower. The experiment was performed using 10 treatments as fallow: fine sand, peat +fine sand (%25+%75), peat + fine sand ( %50 +%50), perlite + peat (%75 + %25), perlite + peat (%50 + %50), perlite + peat (%25 + %75), perlite + peat + expanded clay (%25 + %70 + %5), perlite + peat + expanded clay (%50 + %25 + %25), perlite + peat + expanded clay (25%+ %50 + %25), peat + expanded clay (%50 + %50), as a completely randomized design with 3 replications. All treatments irrigated with same nutrient solution. Results showed that planting beds statistically significant differences in morphological characteristics, macro and micro nutrients in plant. Results showed that the media containing perlite + peat + expanded clay (%25 + %70 + %5) is the best of all. In this treatment, flower number, flower disk diameter, shoot diameter, shoot neck diameter, flower height and vase life were 207 (m2/year), 12.4 cm, 0.8 cm, 0.58 cm, 54.5 cm and 11.6 days, respectively.In this treatment, concentration of Nitrogen, Phosphorus and Potassium were 4.17, 0.8 and 4.34 percent, respectively and micronutrients concentration as Iron, Manganese, Zinc, Copper, and Boron on the plant leaves were 155.73, 194.83, 148.56, 44.92 and 51.5 mg kg-1 dry weight, respectively.
Abdolhamid Mohebi
Abstract
Mycorrhizal symbiosis increase nutrient uptake and enhance plant growth by elaborating root system. The positive effects of mycorrhizal symbiosis on the growth, physiology and ecology of various plants have been recognized. The symbiotic relations between mycorrhizal fungi and date palm with regard to ...
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Mycorrhizal symbiosis increase nutrient uptake and enhance plant growth by elaborating root system. The positive effects of mycorrhizal symbiosis on the growth, physiology and ecology of various plants have been recognized. The symbiotic relations between mycorrhizal fungi and date palm with regard to nutrient uptake by this plant have not yet been explored and studied in Iran. This project was conducted as a randomized complete block design with four replications (blocks) in a greenhouse at Date Palm and Tropical Fruit Research institute during 2008 to 2009. Factor A such as; five rate of fertilizer superphosphate triple (0, 5, 10, 15, 20 mg/kg soil), factor B including; with or without mycorrhiza inoculation. Fresh and dry weight of shoots and roots, root length, mycorhizal root length and nutrient concentration in different treatments were measured. The results showed significantly differences between dry weight of roots and shoots, nitrogen, potassium and phosphorus in shoot and roots (P
Rahmatollah Gholami; Isa Arji; Mohammad Grdkanh
Abstract
In order to determine the effect of irrigation interval and mulch on growth of olive an experiment was carried out in Dallaho Olive Research Station at Sarepole. A split plot experiment was used based on a completely randomized design with three replications and two factors (mulch and irrigation interval). ...
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In order to determine the effect of irrigation interval and mulch on growth of olive an experiment was carried out in Dallaho Olive Research Station at Sarepole. A split plot experiment was used based on a completely randomized design with three replications and two factors (mulch and irrigation interval). Each experiment unit consists of 4 trees. Land preparation was done in February 2005 in a 6048 squared meter area then tree planted. Pruning operation was done in next year. Mulch treatments for experiment were control, polyethylene and organic materials and irrigation treatments period for experiment were 3, 6 and10 days interval. Some growth traits including height, trunk diameter and current season growth were measured at the end of growth season. Collected data were analyzed with MSTATC program. Results showed that organic materials mulch and interval irrigation treatments had significant differences in height, trunk diameter and current season growth so that organic materials mulch and 3 days interval irrigation treatments increased height, trunk diameter and current season growth of olive trees. The interaction effect between mulch and irrigation treatments was significance. So that 3 days interval irrigation and organic materials mulch had the highest height, trunk diameter and current season growth. 6 days interval irrigation supplemented with mulch treatment had more significant effect on these traits compared to 3 days interval irrigation alone.
Rahmatollah Gholami; Kazem Arzani; Isa Arji
Abstract
An experiment was conducted to determine the effect of paclobutrazol (PBZ) and different irrigation amount on growth of aerial parts, leaf minerals and root performance in young olive plants cv. ‘Manzanillo’ in the Department of Horticulture, Faculty of Agriculture, Tarbiat Modarres University in ...
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An experiment was conducted to determine the effect of paclobutrazol (PBZ) and different irrigation amount on growth of aerial parts, leaf minerals and root performance in young olive plants cv. ‘Manzanillo’ in the Department of Horticulture, Faculty of Agriculture, Tarbiat Modarres University in 2000. A split plot experiment in time was used based on a completely randomized block design with four replications. The aim of this experiment was to determine the effect of water irrigation amount reduction on Manzanilo olive response. Treatments were 60, 70, 80, 90 and 100 % evapotranspiration (ETp) and 60% with 0.25 g a.i /pot paclobutrazol (PBZ). Control plants were used as reference to determine evapotranspiration (ETp). Some characteristics such as root, leaf and shoot fresh and dry weight, leaf area, leaf number, plant height, root length and mineral content were measured. Results indicate that root, leaf and shoot fresh and dry weight, leaf area, leaf number, plant height and N and K amount were increased with increasing of water amounts. No differences were found in measured characters between 90 and 100% (ETp) so a 10 percent saving in water was occurred. Result showed that pbz treatment after 45 days reduced shoot growth, leaf and shoot fresh and dry weight, leaf area, plant height, root length and N and K content. Although, PBZ treatment increased root to shoot fresh and dry weight ratio and increased root diameter. In case of water shortage pbz treatment is able to ameliorate the effect of water stress.
