PJB-2023-587
ALLEVIATION OF THE ADVERSE EFFECTS OF ALKALINE SOIL WITH APPLICATION OF HUMIC ACID IN ROSES
Sahar Moradi
Abstract
Soil pH has enormous influence on plants because it affects almost every aspect of nutrient availability by them. In this study humic acid was applied at the concentration of 0, 500, 1000 and 2000 mg L-1 as soil application for rose in alkaline soil condition. Results showed that the highest number of leaves (22.33 leaves), Zn (95.66 mg kg-1 DW), Fe (106.66 mg kg-1 DW), and K content (1.44%) were obtained from the plants treated with 2000 mg L-1 humic acid. The highest leaf area (3934 mm2), root length (25.33 cm), leaf fresh and dry weight, flower longevity (22.33 days), anthocyanin content (0.8 μM g-1 FW), and total chlorophyll (3.57 mg L-1) were related to plants exposed to 1000 mg L-1 humic acid. Also, the plants treated with 500 mg L-1 humic acid exhibited the highest leaf thickness (0.197 mm), flower bud number (2.3 buds), carotenoid (0.327 mg L-1), chlorophyll index (41), N (3.6%), and P content (0.174%). The highest number of days from bud formation until blooming was observed in control plants. Humic acid alleviates the adverse effects of the stress considerably and can be used as a soil amendment agent to tackle the negative effects of the stresses.
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