Erfan Sepahvand; Mahmoud Ghasem nejad; Mohammad Reza Fatahi Moghadam; Ali Reza Talaie; Mohammad Ali Askari Sarcheshmeh
Abstract
The type of training system and application of calcium spray have considerable effects on storability of fruits. In this study, the effects of calcium chloride spray (0, 0.75, 1.5 and 3 g.L-1) in three times during 2, 4 and 6 weeks before harvest time on apple (Malus domestica) fruits cvs. ‘Gala’ ...
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The type of training system and application of calcium spray have considerable effects on storability of fruits. In this study, the effects of calcium chloride spray (0, 0.75, 1.5 and 3 g.L-1) in three times during 2, 4 and 6 weeks before harvest time on apple (Malus domestica) fruits cvs. ‘Gala’ and ‘Delbarestival’, which trained in three different training systems (V shape, HighTech and Cordon) were investigated after 4 months in cold storage. This experiment was designed as split factorial in frame of randomized complete block design with four replications. The fruit characteristics such as fruit firmness, total soluble solids (TSS), titratable acid (TA), TSS/TA, total phenolic, total flavonoids, total anthocyanin, ethylene and respiration rate were evaluated at the end of storability. The results showed that training systems types and foliar application with calcium chloride had significant effect on postharvest quality of fruits. Calcium chloride spray increased TSS, TA content, antioxidant capacity, anthocyanin content, phenol content and tissue firmness of fruits at the end of storage in compared to control. Fruits firmness of Gala was higher than Delbarestival cultivars. The highest TSS (14.22%) and TA (0.47%) content were found in fruits produced with High-tech system when sprayed with 0.75 g. L-1 calcium chloride. Ethylene production of Delbarestival (18.36, 15.22 and 15.11 nL/g.h) was higher than Gala fruits (6.60, 6.38 and 8.43 nL/g.h) at three different training systems. Preharvest calcium spray suppresed ethylene production and respiration rate of apple fruits produced at three different training systems as compared to control at the end of storage.
Nabi Hadavand; Ahmad Ershadi; Rohollah Karimi; Alireza Talaei; Mohammad Ali Askari Sarcheshmeh
Abstract
High-density planting system is one of the effective methods for improving production and profitability of tree orchards. In this research, the effects of four planting densities (1904, 2666, 3137 and 4800 tree/ha) on annual shoot growth, Physicochemical properties of fruit and leaf mineral contents ...
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High-density planting system is one of the effective methods for improving production and profitability of tree orchards. In this research, the effects of four planting densities (1904, 2666, 3137 and 4800 tree/ha) on annual shoot growth, Physicochemical properties of fruit and leaf mineral contents of apple (Malus domestica Borkh cv ‘Granny Smith’) tree grafted on M26 clonal rootstock were studied in randomized complete block design with four treatments and four replications in College of Agriculture and Natural Resources, University of Tehran, during 2009-2010. Based on results, planting density significantly affected some qualitative characteristics such as fruit length, fruit diameter, total soluble solid, fruit dry matter, fruit ash and sun scald, but no significant effect on fruit weight, fruit L/D ratio, TA and tenacity were observed. Planting density significantly affected the leaf N and Fe concentrations. The highest N (1.81 percent) and Cu (39 µg/kg) the lowest Fe of leaves (237 µg/kg) was observed with 1904 tree/ha. Although, planting density had no significant effect on other mineral elements, but with increasing the planting density, leaf P, K, Mg and Mn content increased, but, Ca and Cu decreased. Increasing in N and Fe was associated with a decrease and increase of current seasonal shoot growth, respectively. Likewise, trees with higher crop tend to have more N and less Fe. These results showed that, under Iran climatic condition, with increasing in planting density of apple orchardit can be produced higher fruit crop without decrease in its quality parameters.
Mahdi Shaeri; Vali Rabie; Mehdi Taheri
Abstract
Rootstock and cultivar selection is the most critical decision at the time of an apple orchard establishment. Tree size, yield and fruit quality are affected by roostock and cultivar. Non-sufficient study of rootstocks and cultivars effects on mentioned traits will lead to incorrect result or failure ...
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Rootstock and cultivar selection is the most critical decision at the time of an apple orchard establishment. Tree size, yield and fruit quality are affected by roostock and cultivar. Non-sufficient study of rootstocks and cultivars effects on mentioned traits will lead to incorrect result or failure in orchard managing. In this study the effects of three vegetative rootstocks (MM106, MM111 and M9) on vegetative and reproductive growth and some physiological characteristics of three apple )Malus domestica Borkh.( cultivars, ‘Golden Delicious’, ‘Fuji’ and ‘Delbarestival’ were evaluated in a factorial experiment based on randomized complete block design in Khodabande (Zanjan Province) during two growing seasons in 2011 and 2012. The results showed that different combinations of rootstock and cultivar have significant effects on vegetative vigor, primary and final fruit set, yield per tree and yield per hectare, amount of fruit dry weight, leaf photosynthesis rate, stomatal conductivity and transpiration rate, water use efficiency and leaf soluble carbohydrates. In two years of study, ‘Golden Delicious’ and ‘Fuji’ cultivars had the highest and lowest fruit length, respectively. The highest trees were observed in ‘Delbarestival’ cultivar. Among the evaluated rootstocks, the lowest tree canopy diameter was measured in M9 rootstock. Nitrate reductase activity was affected by cultivar and rootstock and the highest activity of this enzyme was measured in leaves of ‘Golden Delicious’ cultivar grafted on M9 rootstock. ‘Delbarestival’ onto MM106 rootstock and ‘Golden Delicious’ onto M9 rootstock were the most appropriate grafting combination based on the studied traits in this research .
Erfan Sepahvand; Mahmood GHasem nejhad; Mohammad Reza Fattahi Moghadam; Alireza Talaei; Mohammad Ali Askari
Abstract
In this study, the effect of foliar spray with calcium chloride (0, 0.75, 1.5 and 3 g L-1) during 2, 4 and 6 weeks before commercial harvesting time of apple fruit cv. ‘Gala’ and ‘Delbarestival’ which trained in three different systems (V shape, HighTech and Cordon) was investigated. ...
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In this study, the effect of foliar spray with calcium chloride (0, 0.75, 1.5 and 3 g L-1) during 2, 4 and 6 weeks before commercial harvesting time of apple fruit cv. ‘Gala’ and ‘Delbarestival’ which trained in three different systems (V shape, HighTech and Cordon) was investigated. The results showed that types of training systems and foliar application of calcium can affect on fruits quality at harvest time. Tree yield, fruits weigh and fruit tissue firmness of ‘Gala’ was significantly higher than ‘Delbarestival’. Furthermore, calcium spray increased fruit firmness in compared to control and TA deacresead in compared to control. Calcium treatment increased fruit skin a* value that means more antocyanin synthesis and redness. Results generally showed that ‘Gala’ apple trained in HighTech and V shape systems as well as ‘Delbarestival’ in HighTech produced the higher fruits weight and size as well as quality favorite in compare to other system.
Shadab Faramarzi; Abbas Yadollahi; Hassan Hajnajari; Abdolali Shojaeean; Sima Damyar
Abstract
Study of morphological traits of red fleshed apples is a critical step to improve the quality andcommercializing of them. In order to study genetic diversity of Iranian red fleshed apples, a total of 17morphological characteristics were assessed for eight genotypes of red- fleshed (‘Haji Qermez’, ...
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Study of morphological traits of red fleshed apples is a critical step to improve the quality andcommercializing of them. In order to study genetic diversity of Iranian red fleshed apples, a total of 17morphological characteristics were assessed for eight genotypes of red- fleshed (‘Haji Qermez’, ‘GoushtQermez’, ‘Shahroud-10’, ‘Arous Gousht Qermz’, ‘B.9’, ‘Qazvin 1, 2, 3’) and 12 Iranian and foreigncommercial cultivars (‘Shafei’, ‘Golab Kohanz’, ‘Jonathan’, ‘Golden Delicious’, ‘Granny Smith’,‘Soltani Shabestar’, ‘Fuji’, ‘Red Delicious’, ‘Heydar Zadeh’, ‘Golab Sahneh’, ‘Gala’, and ‘Shafi Abadi’).Dendrogram resulting cluster analysis of the data classified all genotypes into 7 groups. All Iranian andforeign cultivars were located in distinct groups. The results showed that Iranian red fleshed apples weredifferent in their flesh color. This research can be very useful for introducing theses cultivars to market orusing in breeding programs.
Ebrahim Ganji Moghadam; Mahbube Zamanipour; Alireza Mohebi Samimi
Abstract
This experiment was carried out to study effects of mechanical and chemical treatments for developing lateral shoot and increasing quality of sweet cherry, apple and pear trees in 2010-2011 in three independent experiments. In the first experiment, effect of the heading treatments in four levels (control, ...
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This experiment was carried out to study effects of mechanical and chemical treatments for developing lateral shoot and increasing quality of sweet cherry, apple and pear trees in 2010-2011 in three independent experiments. In the first experiment, effect of the heading treatments in four levels (control, 40, 60 and 80 cm), in the second experiment, BA treatments in four levels (0, 200, 400, 600 mgL-1) and spraying times in three levels (1, 2 and 3 times) and in the third experiment, Arbolin treatments in four level (0, 5, 15, 25 mlL-1) and spraying times in two level (1 and 2 times) were investigated. Results showed that mechanical and chemical treatments improved the branching of trees but the lateral shoot number with chemical treatments had significant increase in comparison with heading treatments. Therefore, the most lateral shoot number was induced with BA in concentration of 600mgL-1 in three times. The mechanical and chemical treatments in sweet cherry induced lateral shoots more than apple and pear trees. ‘Siah Mashhad’, ‘Red Delicious’ and ‘Spadona’ induced more lateral shoot numbers in comparision with other cultivars.