Document Type : Research Paper - Moderate Fruits
Authors
1 .Department of Horticultural Sciences and Engineering, Faculty of Agricultural Sciences and Engineering, Razi University, Kermanshah, Iran
2 Crops and Horticultural Science Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran
3 Temperate Fruits Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran.
4 Crop and Horticultural Science Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran.
Abstract
Introduction
Peach is one of the most important fruit trees that has been cultivated in Iran since ancient times. Therefore, investigating the adaptability and selecting the best peach varieties for its cultivation expansion is of great importance. The ability of a peach cultivar (a specific cultivated variety of peach) to adapt to a new environment depends on several factors, including: climate, soil and disease and pest resistance. Understanding these factors is crucial for successfully introducing peach cultivars to new areas. Researchers and growers are constantly working to develop new cultivars, evaluate existing cultivars and refine agricultural practices. By considering cultivar adaptability and implementing appropriate strategies, growers can expand peach cultivation into new regions, increasing fruit production and diversifying the agricultural landscape.
Materials and Methods
This project was conducted with 15 peach varieties to evaluate their adaptability for a period of three years starting from 2016 at the Urban Orchard Research Station in Kermanshah Province. The trees were planted in a randomized complete block design with three replications at a spacing of 4 m x 4 m in December 2013. Four trees were planted in each experimental unit, and a total of 12 trees were evaluated for each variety. To evaluate the pomological and yield characteristics of the cultivars, various fruit traits were measured over a three-year period from 2016 to 2018. These traits included fruit and stone weight, fruit and stone dimensions, stone-to-flesh adhesion, skin and flesh color, percent soluble solids, pH, fruit acidity, tree yield, yield efficiency, ripening time, and ripening duration. At the onset of fruit color change, all fruits on each tree were counted. Upon ripening, all fruits of each cultivar were harvested and weighed. A 30-fruit sample was then selected to determine weight, flesh content, stone weight, and fruit quality parameters, including soluble solids, pH, and titratable acidity. To assess quality traits, juice was first prepared from five ripe fruits. Soluble solids were measured using a handheld refractometer model [refractometer model]. pH was measured using a pH meter model [pH meter model]. Titratable acidity was determined by titration with 0.1 N NaOH solution in the presence of phenolphthalein indicator until a color change to purple was observed. The amount of NaOH consumed indicates the malic acid content per 100 g of fruit, which is the predominant acid in peach and nectarine fruits (Cantín et al., 2010). The collected data were analyzed using the MSTATC software, and mean comparisons were performed using Duncan's multiple range test.
Results
The results showed that there were significant differences among the varieties in terms of various fruit characteristics, including the number of fruits per tree, fruit weight, fruit and stone dimensions, fruit yield per tree and hectare, and fruit quality characteristics such as soluble solids, pH, and titratable acidity. The average yield over three years indicated that the fruit yield per hectare varied among the varieties from about 5.5 tons per hectare to about 38 tons per hectare. The 'Suncrest' variety had the highest yield with over 35 tons per hectare. Other varieties such as 'Federica', 'Babygold 6', and 'Babygold 7' were also superior with over 25 tons of fruit per hectare. Based on their good yield, fruit weight, and fruit quality, the varieties 'Suncrest', 'Federica', 'DixiRed', 'Domiziana', 'J.H. Hale', 'Amipsimidia', 'Alberta', 'Spring Crest', and 'Anjiry' were found to be suitable for fresh consumption. For industrial purposes, the use of the varieties 'Babygold 7', 'Babygold 6', and 'Sudanl' was found to be appropriate due to their fruit quality and very high yield.
Conclusion
This study provides valuable insights into the selection of suitable peach varieties for cultivation in Iran, considering both fresh market and industrial processing applications. The findings can guide farmers and policymakers in optimizing peach production and enhancing the competitiveness of the Iranian fruit industry.
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