Document Type : Research
Authors
1
soil and water research department, Khuzestan Agricultural and natural resources research and education center, Agricultural research. education and extension organization
2
Associate Professor, Department of Plant Protection Research, Khuzestan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education Extension Organization. Ahvaz. Iran
3
Research Assistant Professor, Greenhouses and controlled environments Research Center, Horticultural Science Research Institute, Agricultural Research Education and Extension Organization, Ahwaz, Iran.
4
Research Assistant Professor, Date Palm and Tropical Fruit Research Center, Horticultural Science Research Institute, Agricultural Research Education and Extension Organization, Ahwaz, Iran.
10.22092/rhsj.2026.372571.1143
Abstract
This study aimed to investigate the effect of balanced nutrition management on the yellowing and drying of Date Palm (Berhi Date Palm Cultivar) for three years at the Date Palm and Tropical Fruits Research Institute of Iran . It was conducted as randomized complete blocks in three nutritional management treatments with three replications including: T1:conventional farmer, T2: Appling main fertilizers using soil test (use of organic fertilizers (manure) and chemical fertilizers based on the phenological stages of fruit and T3: T2 and supplemental (Humic acid, growth stimulant (seaweed extract and amino acid at a 3:1000 ratio), micronutrient at a 3:1000 ratio and high phosphorus fertilizer(as 7 kg. ha-1), balanced (20-20-20 fertilizer) (as 7 kg. ha-1) high potassium (as 7 kg. ha-1), sulfur fertilizer at a rate of one liter per hectare and Humic acid at a rate of 5 liters per hectare based on the phenological stages of fruit.
The highest yield of date in T3 was measured as 105.5 kg/tree and the lowest yield of date in the conventional treatment was 76.6 kg/tree (38.3% increase). The results showed that the severity of drying and yellowing of date was statistically different in the studied treatments. Thus, the lowest severity of the disease in the third treatment was 17.8%, while the severity of the disease in the conventional treatment was measured at 44.9% (60.5% reduction). The results showed that in addition to basic fertilizers, palm trees require other micronutrients and improvers. Therefore, according to the role of optimal nutrition in improving the growth and nutritional conditions of the tree, increasing fruiting, improving the yield, and increasing the tree's tolerance to the disease, it is recommended to use fertilizers based on the soil test and supplementary nutrition.
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