Effects of Calcium and Potassium Thiosulfate Applications Compared to Sulfate Fertilizers on Leaf and Fruit Nutrient Concentrations and Pomological Traits of Walnut (cv.Chandlr)

Heydari, Sogra; Rabiei, Vali; |  Soleimani, | Asghar; Nasr, Fahime; Heydari, Fateme

doi:10.22059/ijhs.2025.395883.2278

Effects of Calcium and Potassium Thiosulfate Applications Compared to Sulfate Fertilizers on Leaf and Fruit Nutrient Concentrations and Pomological Traits of Walnut (cv.Chandlr)

Articles in Press

Document Type : Full Paper

Authors

Sogra Heydari ¹

Vali Rabiei ²

| Asghar | Soleimani ³

Fahime Nasr ²

Fateme Heydari ¹

¹ Department of Horticulture, Faculty of Agriculture, University of Zanjan, Zanjan, Iran

² Department of Horticulture, Faculty of Agriculture, University of Zanjan, Zanjan Iran

³ Temperate Fruits Research Center, Horticultural Science Research Institute, Agricultural Research, Education and Extension Organizations, Karaj, Iran

10.22059/ijhs.2025.395883.2278

Abstract

The Persian walnut (Juglans regia L.) is one of the most important horticultural crops grown in Iran. Increasing fruit yield and improving fruit quality with high weight, is the main goal of walnut in the world. Effective nutrient management is a fundamental principle of sustainable agriculture. This study aimed to investigate the effects of calcium thiosulfate and potassium thiosulfate on walnut fruit yield and quality. The research was conducted using a randomized complete block design with three replicates at the research orchard in Khormadareh Agro-Industry CO, located in the Zanjan province. The treatments included the application of calcium thiosulfate at a rate of 100 liters per hectare, potassium thiosulfate at a rate of 100 liters per hectare, a combination of calcium thiosulfate and potassium thiosulfate, and a control group. The results demonstrated that all treatments were efficient in preserving the quality and improving walnut fruit production. In addition, the combination of calcium thiosulfate and potassium thiosulfate resulted in a significant increase in various parameters compared to the control. These parameters include dry matter (5.3 %), fresh nut weight (26 %) and dry nut weight (32.6 %), horizontal diameter (8.2 %), lateral diameter (6.4 %) and length of fruit (11.2 %). The use of calcium thiosulfate in conjunction with potassium thiosulfate can enhance some physical and physiological traits of the fruit, leading to improved quality and quantity of walnut fruit.

Keywords

Walnut fruit

qualitative traits

dry matter

Nutrient

Subjects