نوع مقاله : مقاله کامل علمی پژوهشی
نویسندگان
1 بخش تحقیقات زراعی و باغی مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی سیستان، سازمان تحقیقات، آموزش و ترویج کشاورزی، زابل، ایران
2 بخش تحقیقات خاک و آب، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی گلستان، سازمان تحقیقات، آموزش و ترویج کشاورزی، گرگان، ایران
3 موسسه تحقیقات خاک و آب، سازمان تحقیقات آموزش و ترویج کشاورزی، کرج، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Objectives: Yaghouti grape, the dominant variety of the Sistan vineyards, is one of the seedless and early ripening grapes, adapted to the storms of Sistan region, suitable for table grape. Utilizing nutrients at the right time and with the right amount, which increase the efficiency of utilized fertilizer are imperative factors that determines the yield and quality of the fruit. The aim of this research was to investigate the effect of method and time application of iron and zinc fertilizers on the quantitative and qualitative parameters of Yaghouti grapes to improve the production and income of gardeners in the Sistan region.
Materials and Methods: This research was conducted at the Zahak agricultural research station from 2019 to 2022 with the latitude of 30'38'53'', longitude of 49'40'61'' and altitude of 495 meters above sea level. Winters of Zahk city are cold and dry winters, while summers are warm and dry. This research was performed in the form of factorial experiment based on a randomized complete block design with three replications. Fertilization treatments were composed of (1) control, (2) foliar spraying of zinc and iron, (3) local placement of zinc and iron and (4) local placement of zinc and iron + foliar spraying of zinc and iron. Fertilization stages treatments were also composed of (1) bud swelling, (2) emergence of bunch, (3) version, and (4) leaf fall.
Results: The chlorophyll index, bunch coloring, soluble solids and acidity in Fm4×Fs3 conditions increased by 15, 23.4, 17 and 21.2 percent compared to the control, respectively. In the Fm4×Fs1 conditions, the characteristics of leaf area, bud break, bearing coefficient and fruit yield increased by 30, 21, 27.4 and 28.2 percent compared to the control, respectively. Additionally, titratable acidity trait was the highest value at the leaf fall stage in the control condition and in the treatment of iron and zinc application. The chlorophyll index, leaf area, bud break, bearing coefficient and fruit yield increased in the third year compared to the first year by 15, 11.8, 12.5, 12.1 and 9.6 percent, respectively.
Conclusion: Fertilization is one of the key techniques in the vineyard management, which has a significant impact on the amount of production and the final quality of grapes. At the beginning of the growing season, the aerial part of the tree, including vegetative and reproductive buds, begins their activity with rapid growth. This is while the active roots have not yet started to grow and do not absorb nutrients from the soil to meet the nutritional needs of the tree. Therefore, the best time to use these fertilizers was the swelling bud stage and the local placement method along with foliar spraying of zinc and iron elements. The results of this research indicated that the measured traits increased in the third year compared to the second year and in the second year compared to the first year, respectively. Considering the positive role of zinc and iron elements in improving fruit characteristics and yield, it is recommended to utilize zinc and iron elements local placement in addition to foliar spraying of zinc and iron elements in the bud swelling stage, which increases yield by 24.3 percent.
کلیدواژه‌ها [English]
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