Document Type : Original Article
Authors
1
Former MSc student Department of Horticultural Sciences, Sari Agricultural sciences and Natural Resources University (sanru), Sari, Iran.
2
Assistance Professor, Department of Horticultural Sciences, Research Institute of Medicinal Plants Biotechnologies (RIMPBio), Sari Agricultural Sciences and Natural Resources University (SANRU), Sari, Iran.
3
Assistance Professor, Department of Horticultural Sciences, Sari Agricultural sciences and Natural Resources University (sanru), Sari, Iran.
10.30466/rip.2022.53638.1185
Abstract
Strawberries are one of the most important small fruits that can cultivated more than annual crop. Therefore, it is important to know the effect of fertilization in the first year on the yield of the second year of this crop. This study was conducted on a soil culture media as factorial based on randomized complete block design with three replications. The first factor includes spring nitrogen fertilization at three levels (0, 150 and 300 kg.ha-1 nitrogen in Urea from) every other week, and the second factor was fall fertilizer at three levels (0, 50 and 100 kg.ha-1 nitrogen in Urea from) from late September to early October. The results showed in plants treated with nitrogen 100 kg.ha-1 in fall had a maximum number of crowns (3.43) and berry size (length: 4.37 cm and width: 3.42 cm). Application of spring (300 kg.ha-1) and fall (100 kg.ha-1) of nitrogen resulted in the highest number of flowers (53), Berry weight (24.35g) and yield (1016.37 g.plant-1). The highest amount of anthocyanin and inhibition percentage were observed in the control treatment (15.45 mg. L-1 juice and 72.93%, respectively). The highest amount of vitamin C was produced in the treatment of 150 kg.ha-1 of spring nitrogen (33 mg.Kg-1). In general, the results indicate that the application of nitrogen in spring and fall can increase the yield of strawberries in the second year; However, high nitrogen ratios can reduce the nutritional value of strawberries.
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