Rasol Heydarnejad; Zahra Ghahremani; Taher Barzegar; Vali Rabiei
Abstract
To evaluate the effects of harvest time and duration of storage on the fruit quality and storage longevity of physalis )Physalis angulate L.(, an experiment was carried out based on completely randomized design (CRD), with three replications in 2016. Factors were three fruit harvest stages (mature green, ...
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To evaluate the effects of harvest time and duration of storage on the fruit quality and storage longevity of physalis )Physalis angulate L.(, an experiment was carried out based on completely randomized design (CRD), with three replications in 2016. Factors were three fruit harvest stages (mature green, yellowish green, and yellow) and storage times (0 (harvest time), 10, 20, 30 days). The results showed that different harvest times and storage durations had significant effects on the fruit quality indices and storage longevity. The highest value of flavor and fruit color index, vitamin C (201.54 mg) and total soluble solids (TSS) (7.6 percent of brix) contents were obtained in the fruit harvested at the yellow stage under 10 days storage duration, and with longer storage duration reduced vitamin C and TSS contents. The maximum titratable acidity (1.71 mg/100gr) and pH of fruit were observed at the mature green stage in harvest time. Chart differences color in storage was accompanied by an upward trend in the amount of mature green fruit significantly different than the fruit was yellowish green and yellow. According to the results, because of climacteric nature of physalis fruits, gradual ripening and fruit color change, harvesting of fruit at mature green stage increased the storage life up to 30 days at 15 °C compared to other fruits harvested times.
Negar Heidarian; Taher Barzegar; Zahra Ghahremani
Abstract
In order to evaluate the effect of water stress on the growth, yield and fruit quality of some Iranian melon accessions, an experiment was carried out in a split plot based on randomized complete block design with three replicates in research filed of university of Zanjan as during 2015. Treatments consisted ...
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In order to evaluate the effect of water stress on the growth, yield and fruit quality of some Iranian melon accessions, an experiment was carried out in a split plot based on randomized complete block design with three replicates in research filed of university of Zanjan as during 2015. Treatments consisted arrangement of three irrigation levels (starting irrigation at 100, 70 and 40% ETc) and 8 accessions of Iranian melon (‘Ghalam’ ‘Ghash’, ‘Roshe’, ‘Zerke’, ‘Khatooni’, ‘Rish Baba’, ‘Ghobadloo’, ‘Garake’ and ‘Kalyar’). The results showed that water deficit stress significantly reduced growth and fruit yield. The lowest yield (18223.1 kg/ha), fruit weight (1057.94 gr), number of fruits per plant (1.75), leaf area (124.257 cm2) and the highest leaf dry weight (21%) was obtained in water deficit stress 40% ETc. Accessions had different growth and fruit yield. In all accessions, growth and fruit yield was reduced by increasing of water deficit stress, but leaf dry weight, TSS and water use efficiency was increased. The highest amount of leaf area (410.279 cm2), yield (49881.33 kg/ha) and fruit weight (2270.9 gr) was obtained in ‘Ghalam Ghash’ under 100% ETc irrigation. Also the maximum water use efficiency was observed in "Khatooni" and ‘Ghalam Ghash’ under water deficit 40% ETc. According to the results, ‘Zerke’ and ‘Rish Baba’ with highest (65.17%) and lowest (41.16 %) yield reduction respectively under irrigation 40% ETc were sensitive and tolerance accession to the water stress compared to normal irrigation.
Behnam Alizadeh; Zahra Ghahremani; Taher Barzegar; Jaefar Nikbakht
Abstract
In order to study the effect of putrescine on the growth, yield and fruit quality of Sweet pepper (Capsicuum annum cv. Dimaz) under water stress, an experiment was conducted in split plot based on randomized complete block design with three replications at the research filed of university of Zanjan. ...
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In order to study the effect of putrescine on the growth, yield and fruit quality of Sweet pepper (Capsicuum annum cv. Dimaz) under water stress, an experiment was conducted in split plot based on randomized complete block design with three replications at the research filed of university of Zanjan. Treatments consisted of three irrigation levels (50, 75 and 100% ETc) and putrescine were included four levels (0 (control), 0.5, 1 and 1.5 mM). The results showed that water deficit stress reduced growth and fruit yield of sweet pepper. The highest growth, fruit number, yield and vitamin C content was obtained in irrigation 100%, ETc and TSS in 75% ETc. Foliar application of putrescine improved growth and fruit yield. The highest plant growth, plant height (67.00 cm), leaf area (5887.28 cm2), chlorophyll content (2.2 μg /g), plant dry weight (29.41 ETc), vitamin C (42.67 mg/100ml), fruit chlorophyll (0.18 μg /g), fruit length (16.56 cm), fruit number (268.00), fruit yield per plant (0.45 kg) and total yield per hectare (9.98 ton) was obtained with foliar spray of 1.5 mM putrescine under 100% ETc irrigation. According to the results, application of 1.5 mM putrescine can be proposed to improve growth and fruit yield of pepper under water deficit stress.
Mahboobeh Fizabadi; Zahra Ghahremani; Taher Barzegar; Ahmad Golchin
Abstract
Today, the production of healthy and high quality seedlings is the main factors of success in growing vegetables such as tomato. Hence, in order to investigate the effect of different levels of vermicompost and nitrogen on the growth parameters of tomato seedlings (Lycopersicon esculentum Mill. cv. Rio ...
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Today, the production of healthy and high quality seedlings is the main factors of success in growing vegetables such as tomato. Hence, in order to investigate the effect of different levels of vermicompost and nitrogen on the growth parameters of tomato seedlings (Lycopersicon esculentum Mill. cv. Rio Grande), a factorial experiment was conducted in a randomized complete design with three replications in 2014 at the research greenhouse of Department of Horticultural Science, University of Zanjan. Treatments consisted of five vermicompost levels (0, 5, 10, 20 and 40 wt %) and nitrogen at five levels (0, 25, 50, 100 and 200 mg N/kg soil). The results showed that nitrogen treatments caused a significant increase in seedling growth. The maximum seedling height, dry weight of root and stem, fresh weight of stem, leaf area and chlorophyll content was observed in 100 mg N/kg Soil. The vermicompost treatments significantly increased seedling growth, so the highest seedling height, internodes length, root and stem length, fresh and dry weight of root and leaf area was obtained in the 10 wt% vermicompost. Also vermicompost caused a significant decrease in growth period of transplant and the minimum period (39.6 days) was recorded in the 10 wt% vermicompost. According to the results the concentration of N. P and K in leaf increased with application of vermicompost. Application of 100 mg N/ kg soil and 10 wt% vermicompost improved seedling growth
FArzaneh Kheiri; Taher Barzegar; Zahra Ghahremani; Vali Rabiei
Abstract
In order to study the effects of chitosan and hot water treatments on storability and fruit quality of sweet pepper "Paks", an experiment was conducted as a factorial design in the base of CRD with three replications.Fruits were treated withchitosan at four levels (0, 1, 1.5 and 2 percent) and hot water ...
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In order to study the effects of chitosan and hot water treatments on storability and fruit quality of sweet pepper "Paks", an experiment was conducted as a factorial design in the base of CRD with three replications.Fruits were treated withchitosan at four levels (0, 1, 1.5 and 2 percent) and hot water at 20 and 45ºC (dipping for 2 min time) and 60ºC (dipping for 2o sec time), then stored for 12, 24 and 35 days at 8°C and 98% RH in refrigerator. The results showed that the quality and vitamin Ccontent of fruits decreased during storage. Coating of pepper with chitosan significantly delayed loss of TSS, firmness, vitamin C, weight losses and fruit quality. Pepper coated with 2% chitosan had the highest effect on keeping fruit quality. Hot water had significant effect on fruit quality. Water with 45°C as hot water treatment improved firmness, titrable acidity, vitamin C, visual quality and activity of catalase and peroxidase enzymes. Heat damage was observed on fruit dipping at 60°C. According to the results, treatment of 2 percent chitosan with hot water 45°C had the best effect on the studied parameters.
Hadi Lotfi; Taher Barzegar; Vali rabiei; Zahra Ghahramani; Jafar Nikbakht
Abstract
In order to evaluate the effect of water stress on fruit quality and quantity of some Iranian melons, the experiment was set out in a split plot design with three replicates in research filed of University of Zanjan in 2014. Treatments consisted arrangement of three Irrigation levels (starting irrigation ...
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In order to evaluate the effect of water stress on fruit quality and quantity of some Iranian melons, the experiment was set out in a split plot design with three replicates in research filed of University of Zanjan in 2014. Treatments consisted arrangement of three Irrigation levels (starting irrigation at 100, 66 and 33 ETc) and 11 genotypes of Iranian melons (ʼKhatouniʻ, ʼKaliʻ, ʼOrshangʻ, ʼMouriʻ, ʼMoziʻ, ʼZarde-Paeizeʻ, ʼShiraziʻ, ʼShiardarʻ, ʼEzmirʻ, ʼEyvan-e-keyʻ and ʼSuski-e-Sabzʻ). Results showed that irrigation had a significant effect on flesh firmness, fruit length and width, thickness of skin, pH, total soluble solids (TSS) content, fruit weight and yield ratio. The water stress significantly increased TSS and reduced flesh firmness. The lowest values of yield (13761 kg/ha), fruit weight (1363.7 gr), fruit width (12.97 cm), and the highest skin thickness (4.63 mm) and pH (6.28) was obtained in the sever water stress (start point of 33 ETc). Melon accessions showed significant differences in studied traits. The highest values of fruit length (31.6 cm), flesh firmness (2.9 kg/cm-2), yield (49698 kg/ha) and fruit weight (3223 gr) was obtained under 100 ETc irrigation in ʼKhatouniʻ , ʼZard-e- Paeizehʻ and ʼEyvan-e-keyʻ, respectively. Also, the highest TSS was obtained in ʼShiraziʻ under 33 ETc irrigation. According to the results, ʼEyvan-e-keyʻ and ʼMoziʻ, respectively were sensitive and tolerance accession to the water stress with highest (72.27 Percent) and lowest (43.4 Percent) reduction of yield under 33 percent ETc irrigation compared normal irrigation.