Volume 11, Issue 1 (4-2020)                   2020, 11(1): 13-27 | Back to browse issues page


XML Persian Abstract Print


Dept. of Hort., College of Agric., Isfahan Univ. of Technol., Isfahan, Iran.
Abstract:   (1480 Views)
Due to ever increasing greenhouse cultures, using organic fertilizers for enhancing healthy products is necessary. To investigate the effect of two types of these fertilizers on tomato, in a factorial experiment, based on completely randomized design with 3 replications, with 2 pots in each replication, 0 g/kg humic acid (Humic0) and 1 g/kg (Humic1) and amino acid at 3 levels of 0 g/kg (Amin0), 1 g/kg (Amin1) and 2 g/kg (Amin2), were fertigated once every 10-day. Fruit characteristics at first and second harvests in green, orange, pink and red phases were studied. Results showed that fruit dry weight was less affected by humic acid and amino acid than fruit fresh weight, especially in green and orange phases. In pink and red phases, in the first harvest, fruit dry weight was increased with amino1 and amino2, in both concentrations of humic acid, as compared with control. Amin1 and humic1 had the highest total soluble solids. Fruit phosphorus concentration in humic1 and amin2 was the highest. Potassium concentrations in amino1 and amino2 in both humic acid concentrations were higher than control. Nitrogen concentration in humic1 and amin2 was increased. Therefore, it is recommended that greater amount of these fertilizers or more application times, be used in nutrient solution of tomato at fruit ripening stage and first harvest. Since using these fertilizers is more effective on fresh weight than on dry weight, it is recommended to use them for fresh tomato consumption than for processing tomato for paste.
Full-Text [PDF 2111 kb]   (851 Downloads)    
Type of Study: Research |
Received: 2018/04/24 | Accepted: 2019/01/9 | Published: 2020/04/29

Add your comments about this article : Your username or Email:
CAPTCHA

Send email to the article author


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.