S. Asadi Sanam; M. Zavareh; H. Pirdashti; F. Sefidkon; Gh.A. Nematzadeh; A. Hashempour
Abstract
This research was aimed to investigate the effect of planting date and soil flooding duration on some biochemical characteristics of purple coneflower (Echinacea purpurea (L.) Moench) in Sari region. The study was conducted in a RCBD based split plot with three replications in the Research Farm of the ...
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This research was aimed to investigate the effect of planting date and soil flooding duration on some biochemical characteristics of purple coneflower (Echinacea purpurea (L.) Moench) in Sari region. The study was conducted in a RCBD based split plot with three replications in the Research Farm of the Genetics and Agricultural Biotechnology Institute of Tabarestan, Sari Agricultural Sciences and Natural Resources University, in 2012. Experimental treatments included three planting dates (June 30, July 30 and August 29) and three soil flooding durations (without flooding as control, three and five-day flooding) which were considered as main and sub-plots, respectively. Malondialdehyde (MDA), total phenols and flavonoids contents, protein oxidation of the leaves, enzyme activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), peroxidase (POD) and catalase (CAT), as well as percentage of DPPH free radical inhibition were determined. Results of this experiment showed a significant increment of malondialdehyde (MDA) content in purple coneflower leaf with the highest level in five-day flooding duration and in August 29 planting date. The highest decrease in total protein was found in the same planting data and flooding duration with 90 % decline than control.The highest activity of antioxidant enzymes of superoxide dismutase (SOD) and ascorbate peroxidase (APX) was recorded in the purple coneflowers leaves, cultivated in June 30, and flooded for three days, while the highest activity of peroxidase (POD) and catalase (CAT) were observed in plants cultivated in July 30. Five-day soil flooding markedly increased the total phenols and flavonoids content just in plants transplanted in June 30. In addition, the highest percentage of DPPH free radical inhibition was measured in plants subjected to continues five-day soil flooding and cultivated in August 29. In conclusion, it seems that the coneflower plant relatively showed a good tolerance to flooding stress.
F. Eslami Khalili; H. Pirdashti; M.A. Bahmanyar; F. Taghavi Ghsemkheili
Abstract
In order to evaluate the effects of enriched and non-enriched organic and chemical fertilizers on chemical properties of soil and some nutrient concentrations in pot marigold (Calendula officinalis L.), a pot experiment was conducted based on randomized complete block design with 11 treatments and 3 ...
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In order to evaluate the effects of enriched and non-enriched organic and chemical fertilizers on chemical properties of soil and some nutrient concentrations in pot marigold (Calendula officinalis L.), a pot experiment was conducted based on randomized complete block design with 11 treatments and 3 replications in 2010. Treatments were included control (without organic or chemical fertilizer), chemical fertilizer (CF) as the rate of 80 kg urea ha-1, 100 kg ha-1 super phosphate triple and 80 kg potassium sulfate ha-1, compost, pasteurized compost (bagas + perlit), sheep manure (10 ton ha-1 alone or plus ½ and ¼ CF). Results showed that fertilizer treatments had significant effect on all treatments except leaf potassium. Accordingly, leaf and flower dry weight were maximum in 10 ton ha-1 pasteurized compost and farmyard manures plus ½ and ¼ CF. The highest phosphorous concentration in flower and leaf (0.46 and 0.17 percent, respectively) was recorded when 10 ton ha-1 compost plus ¼ CF was applied. Furthermore, maximum Cu concentration in both flower and leaf (32.60 and 26.25 mg L-1, respectively) were belonged to either 10 ton ha-1 compost plus ½ CF or 10 ton ha-1 farmyard manure while 10 ton ha-1 farmyard manure plus ½ CF had not significant effect on Mn content in flower and leaf. The highest Zn in leaf of marigold was observed in 10 ton ha-1 compost up to 1.2 times compared to control.
A. Mottaghian; H. Pirdashti; M.A. Bahmanyar; B. Motaghian
Abstract
In order to investigate the effects of municipal waste (MSW) compost and beneficial fungi of Trichoderma on seedling emergence parameters, growth and some micronutrients uptake of basil (Ocimum basiilicum L.), a pot experiment was carried out in a factorial arrangement based on a randomized complete ...
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In order to investigate the effects of municipal waste (MSW) compost and beneficial fungi of Trichoderma on seedling emergence parameters, growth and some micronutrients uptake of basil (Ocimum basiilicum L.), a pot experiment was carried out in a factorial arrangement based on a randomized complete blocks design with 3 replications. The treatments were consisted of three levels of municipal solid waste compost (15, 30, 45 Mg ha-1alone and plus 50% chemical fertilizer), recommended chemical fertilizer (90 kg ha-1 N, 50 kg ha-1 K2O and 45 kg ha-1 P2O) and a control (no compost or chemical fertilizer application) and three species of Trichoderma (T. viridae, T. harzianum, T. hamatum). The orthogonal contrasts revealed that municipal solid waste compost significantly decreased final seedling emergence percentage (8.02%), mean emergence time (52.32%) and cumulative emergence rate (15.67%) compared to chemical fertilizer. In contrast, this group of fertilizers increased aerial and root fresh weight (13.10 and 33.59%, respectively) and dry weight and length of root (28.30 and 13.24%, respectively) rather than chemical fertilizer. In this experiment, the MSW compost markedly increased plant tissue Cu, Zn and Fe content (26.85, 14.14 and 20.09%, respectively) compared to chemical fertilizer. Also, enriched MSW increased plant Fe and Cu content (9.03 and 12.27%, respectively) compared to non-enriched MSW. Among Trichoderma speceices, T. harzianum was superior in terms of aerial and root dry weight (16.05 and 17.27%, respectively), plant height and root lenght (8.44 and13.03 %, respectively) and plant tissue Cu content (31.14%) compared to T. hamatum. Generally, in this experiment, the 30 and 40 Mg ha-1of compost despite the limitation of seedling emergence, could improve the growth and quality of basil.
