Zahra Esfahani; Taher Barzegar; Zahra Ghahremani; Jafar Nikbakht
Abstract
In order to study the effect of water deficit stress and foliar spray of Megafol on yield, fruit quality and water use efficiency (WUE) of tomato cv. Rio Grande, an experiment was carried out in a split plot based on randomized complete block design with three replications in Research Filed at the University ...
Read More
In order to study the effect of water deficit stress and foliar spray of Megafol on yield, fruit quality and water use efficiency (WUE) of tomato cv. Rio Grande, an experiment was carried out in a split plot based on randomized complete block design with three replications in Research Filed at the University of Zanjan, Iran in 2015. Treatments consisted arrangement of three irrigation levels (starting irrigation at 100, 75 and 50% ETc (crop evapotranspiration)) and four levels (0, 1, 2 and 3 ml/L) of Megafol. Results showed significant effects of water deficit stress on yield, fruit quality, and WUE. Megafol treatment showed significant effects on yield, fruit firmness, lycopene content, and WUE. The highest total soluble solids (2.41%) and titratable acidity (TA) (2.09) was found at 50% ETc irrigation treatment. Foliar application of 2 ml/L megafol showed the highest value of TSS (2.29%), TA (1.97%), lycopene (0.83 g/l), fruit per plant (37.94), fruit weight (59.32 g) and WUE (21.78 kg/m3). The interaction effect of irrigation by foliar treatments had a significant effect on plant yield, fruits number per plant and TA. The maximum fruit number (51.73) and plant yield (3278.43 g) was obtained by application of 2 ml/L Megafol under 100% ETc irrigation. Also, the highest TA was achieved in 1 ml/L Megafol and 50% ETc irrigation. According to the results, foliar application of 2 ml/l Megafol improved fruit yield under normal irrigation and deficit water stress and resulted in 16% increase in WUE. Irrigation at 75% ETc level with 16% yield reduction, saved 25% of water as compared to 100% ETc treatment.
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’ ...
Read More
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.
Sedigheh Bahrami; Ali Soleimani; Fariborz Habibi
Abstract
Effect of foliar spraying by humic acid on mineral leaf composition, yield and fruit quality of apple (Malus domestica L. cv. ‘Granny Smith’) was studied. An experiment based on randomized complete design was conducted in Khorramdare city of Zanjan province. Spraying of humic acid was conducted ...
Read More
Effect of foliar spraying by humic acid on mineral leaf composition, yield and fruit quality of apple (Malus domestica L. cv. ‘Granny Smith’) was studied. An experiment based on randomized complete design was conducted in Khorramdare city of Zanjan province. Spraying of humic acid was conducted in four levels 0, 5, 10 and 15 mg/l on eight year-old ‘Granny Smith’ apples grafted on MM106 rootstock. Spraying was conducted two, four and eight weeks after full bloom stage. Results showed that humic acid treatment significantly increased yield, total soluble solid (TSS), acidity (pH), concentration of leaf potassium and total chlorophyll content. Concentrations of 10 and 15 mg/l had the highest effect on yield. The humic acid treatment reduced vegetative current shoot growth. There have not significant effect on fruit firmness diameter and length fruit of treated fruits and control. The parameters such as total sugar, leaf area, concentration of N and P of leaf did not influenced by humic acid treatment. According to the results, it can be concluded that concentrations of 10 and 15 mg/l of humic acid spraying have main effect on increasing yield and precocity of ‘Granny Smith’ apple.