Studies on the effect of GA3 application on physiological regulation of flowering and maturity in mango [Mangifera indica L.] cv. Langra

Loading...
Thumbnail Image
Date
2019-01-12
Journal Title
Journal ISSN
Volume Title
Publisher
Department of Horticulture (Fruit & Fruit Technology), BAU, Sabour
Abstract
Mango (Mangifera indica L.) is one of the most important fruit crops of many tropical and sub-tropical countries of world which belongs to the family Anacardiaceae (Nakasone and Paul 1998 and Purseglove 1972).The experiment was carried out in Horticulture Garden of Bihar Agricultural College, Sabour during Rabi season of 2013 - 2015 with the objectives focused in this direction on the effect of GA3 application on physiological regulation of flowering and maturity in mango [Mangifera indica L.] cv. Langra. A critical analysis of data revealed that wide range of phonological observation was observed on morphological traits. The traits such as panicle emergence (14.55 Days), days to 50 % flowering (38.45 Days), bud break to full bloom (45.85 Days) and period of full bloom to maturity (110.43 Days) was recorded with gibberellic acid (GA3) @ 100 ppm, respectively. The other traits like panicles per tree (1044.45) and maximum leaf area (89.73 cm2) were recorded when application of gibberellic acid @ 200 ppm respectively. The other traits like length of panicles (26.73 cm) was recorded when application of gibberellic acid @ 0 ppm while flowering intensity (67.09 %) was recorded when spray of gibberellic acid @ 100 ppm. A wide range was observed with application of gibberellic acid on Physiological parameters. The trait such as photosynthetic rate (8.71 µmol/m2/sec) and internal CO2 concentration (283.80 ppm) was recorded with gibberellic acid @ 200 ppm while Stomatal conductance of leaf (0.163 µmol/m2/sec) was recorded at the time of stone formation stage. The physical observations fruit set percentage (17.98 %) was recorded with gibberellic acid @ 50 ppm within pea stage and fruit retention percentage (0.67 %) and fruit drop percentage (99.01 %) was recorded with gibberellic acid @ 0 ppm within stone formation stage. The other traits like yield (288.73 Kg/ plant) and length of fruit (97.47 mm) was recorded with spray of gibberellic acid @ 100 ppm respectively. The other traits like pulp weight (210.00 g), edible: non edible ratio (2.69) and Pulp and stone ratio (6.11) was recorded with gibberellic acid @ 50 ppm, however, maximum stone weight (37.95 g) and peal weight (59.91 g) was recorded at the time of 20 days before expected harvest stage. A wide range of Chemical parameter was observed with application of different dose of gibberellic acid. The parameters such as total soluble solids (20.53 0Brix), acidity percentage (0.364 %), total sugar content (16.24 %) and ascorbic acid content (57.65 mg/ 100 g fruit weight) was recorded with gibberellic acid @ 100 ppm, respectively. The wide range of Leaf nutrient was observed with different dose of gibberellic acid. The parameters such as nitrogen content (1.31 %) and phosphorus content (0.109 %) was recorded with gibberellic acid (GA3) @ 0 ppm. Other traits like potassium content (0.91 %) and iron content (79.52 ppm) and manganese content (58.86 ppm) and copper content of leaf (32.90 ppm) were recorded with gibberellic acid (GA3) @ 200 ppm respectively. The traits like leaf calcium content (1.87 %) and magnesium content (0.188 %) was recorded with gibberellic acid (GA3) @ 100 ppm while as leaf zinc content (19.97 ppm) was recorded with gibberellic acid (GA3) @ 0 ppm.
Description
Keywords
Citation
Collections