Raghad Tahrir Salim Al-Shallal; Thamir Abdulla Al-Zahwan
Volume 21, Issue 2 , March 2021, , Pages 144-149
Abstract
The experiment was carried out in the lathhouse the Department of Horticulture and Landscape, College of Agriculture, Tikrit University during the spring of 2020. The aim of this experiment was to investigate the effect of humic acid and NPK fertilizers on the vegetative growth and flowering of Pelargonium ...
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The experiment was carried out in the lathhouse the Department of Horticulture and Landscape, College of Agriculture, Tikrit University during the spring of 2020. The aim of this experiment was to investigate the effect of humic acid and NPK fertilizers on the vegetative growth and flowering of Pelargonium graveolens L. Two factors including humic acid fertilizer (without, with addition at 3 g pot-1) and chemical fertilizer NPK (without addition, addition at 1g L-1, or at 2 g L-1) were used. The experiment was implemented according to the randomized complete block design (RCBD). The results showed that addition of humic acid had the highest percentage of phosphorus in the leaves (0.447%). On the other hand, the treatment of 1g liter-1 NPK was superior in plant height (42.330 cm plant -1) and number of flowers (34.718) while the treatment of 2g L-1 had the highest number of leaves (217.08) and leaf area (189.06 cm2).
Media MohammedAmin; Sawsan Kanimarani
Volume 20, Issue 1 , March 2020, , Pages 38-48
Abstract
The present study was accomplished to achieve the effect of Humic Acid (HA) spraying on the vegetative and calyxes yield characteristics of Hibiscus sabdariffa L. plants, during May ,22th to December, 31st, 2017, at (Girdarasha) open field, Department of Horticulture, Agricultural Engineering ...
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The present study was accomplished to achieve the effect of Humic Acid (HA) spraying on the vegetative and calyxes yield characteristics of Hibiscus sabdariffa L. plants, during May ,22th to December, 31st, 2017, at (Girdarasha) open field, Department of Horticulture, Agricultural Engineering Science College, Salahaddin University. Four levels of HA were sprayed (0, 1, 2, 3 g.l-1) at three frequencies (60, 75 and 90 days after sowing). The data were collected after (4, 8 and 12 weeks of last spraying) for vegetative and reproductive parameters: plant height (cm), number of branches, stem diameter (mm), days to 50% of plants flowering, flower diameter (mm), node sequence of 1st flower, number of fruits. plant-1 , fruit length (mm), fruit diameter (mm), fresh and dry weight of fruits. plant-1 (g) and fresh weight of calyxes. plant-1 (g). The obtained results revealed that all treatments of HA increased significantly both vegetative and reproductive parameters and shortened the number of days to flowering as compared with the control. The application of 2g.l-1 produced the tallest plants. Maximum numbers of branches were obtained from the treatment 3g.l-1 HA. The 2g.l-1 and 3g.l-1 treatments formed the thickest stems. Regarding the reproductive parameters; the highest values of fruit diameter, fruit length, fresh and dry weights of fruits. plant-1, fresh and dry weights of calyxes.plant-1 were recorded with the treatment 3g.l-1 after 8 weeks of the last treatment.
