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20191
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Subject: Horticulture × Author: Akshay × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Studies on the effect of growth regulators on flowering, fruiting & quality of sapota (Manilkara zapota)
    (CCSHAU, 2019) Akshay; Godara, R.K.
    The present study entitled, “Studies on the effect of growth regulators on flowering, fruiting & quality of sapota (Manilkara zapota)” was conducted at Experimental Orchard of COA, Kaul, (Kaithal), CCS HAU, Hisar (Haryana) during 2018 and 2019 on twenty eight years old sapota trees with the objective to study the effect of growth regulators on the fruit set, yield and quality of sapota. The experiment was laid out in Randomized Block Design replicated thrice to study the effect of CCC 400ppm at fruit bud differentiation in July and followed by other growth regulators (GA3 100, 150 ppm and NAA 100, 200, 300 ppm) at 50% flowering and again at pea stage of fruit development over control. Percent increase in plant height (5.69 %), stem girth (1.91 %), tree spread E-W (8.64%) and N-S (8.68%) considerably increased with application of growth hormones maximum increase was observed in CCC 400 ppm superimposed by GA3 150 ppm and NAA 300 ppm. Minimum no of days to flower (23 days), days to fruit setting (34 days), days to maturity (218 days) was observed in CCC 400 ppm followed by GA3 150 ppm and NAA 300 ppm. Maximum number of flower per cluster (12.56), fruit setting (46.74 %) and fruit retention (21.25 %) and no. of fruit per cluster (3.87) was recorded with application of CCC 400 ppm followed by GA3 150 ppm and NAA 300 ppm. Maximum fruit length (6.01 cm), fruit diameter (5.42 cm) and fruit weight (97.65 gm) and minimum number seed (1.00) was observed with application of CCC 400 ppm followed by GA3 150 ppm and NAA 300 ppm. Maximum number of fruit per tree (1316.00) and yield per tree (128.86 kg) was recorded with treatment of CCC 400 ppm followed by GA3 150 ppm and NAA 300 ppm. Highest increase in TSS (22.3 %), total sugars (14.83 %), reducing sugars (8.90 %), non reducing sugars (5.93 %) and significant decrease in acidity (0.12 %) was obtained with application of CCC 400 ppm superimposed by GA3 150 ppm and NAA 300 ppm.