Effect of PGRs and micronutrients on granulation disorder of citrus cv. Rangpur lime.
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Date
2020-08-19
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College of Horticulture and Forestry, Central Agricultural University, Pasighat
Abstract
The Present research was carried out during the year 2019-2020 at Fruit Research Farm, Department of Fruit Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh to find out the effect of PGRs and micronutrients on granulation disorder of citrus cv. Rangpur Lime. The experiment was laid out in randomized block design (RBD) with 9 treatments and 4 replications.
Results in the investigation recorded significant effect on reducing granulation disorder and improving the fruit yield. Amongst all the treatments (T6) i.e., NAA @ 300 ppm + GA3 @ 15 ppm + ZnSO4 @ 0.5% + CuSO4@ 0.5% showed maximum improvement in yield and reducing the granulation disorder in which maximum increase in fruit weight (161.48 g), number of fruits/tree (799.25 fruits/tree), fruit yield (129.06 kg/tree), fruit breadth (6.75 cm), fruit length (6.75 cm), fruit setting (37.50 %), fruit retention (54.00 %) and minimum granulation (17.80 %) was recorded as compared to control (35.00%). Also, maximum viable seeds/fruit was noted in T6 (12 viable seeds/fruit) which is at par with (T5) NAA @ 250 ppm + GA3 @ 10 ppm + ZnSO4 @ 0.5% + CuSO4@ 0.5% and minimum in control (4 viable seeds/fruit).It was also noted that quality parameters viz., TSS (5.64 °B), Ascorbic acid (20.87 mg/100 ml juice), juice content (70.00 ml), total sugars (3.41 %), reducing sugars (0.41 %) and non-reducing sugar (2.84 %) were maximum in treatment T6.
Thus, foliar spray of NAA @ 300 ppm + GA3 @ 15 ppm + ZnSO4 @ 0.5% + CuSO4 @ 0.5% (T6) thrice given in the month of August, September and October respectively along with RDF (900:250:500 g NPK/plant + 20 kg FYM/plant/year) in which half RDF +20 Kg FYM along with ZnSO4 and CuSO4 as foliar spray before flowering and half RDF after fruit setting proved the effectiveness of plant growth regulators and micronutrients in reducing granulation, improving quality and yield which ultimately increase the fruit productivity of Rangpur Lime under the foothill conditions of Arunachal Pradesh.
Description
The Present research was carried out during the year 2019-2020 at Fruit Research Farm, Department of Fruit Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh to find out the effect of PGRs and micronutrients on granulation disorder of citrus cv. Rangpur Lime. The experiment was laid out in randomized block design (RBD) with 9 treatments and 4 replications.