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Effect of pollination methods, plant bioregulators and micronutrient on fruit set, yield and quality of litchi (Litchi chinensis Sonn.)

KrishiKosh

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Title Effect of pollination methods, plant bioregulators and micronutrient on fruit set, yield and quality of litchi (Litchi chinensis Sonn.)
 
Creator Brijwal, Manoj
 
Contributor Dimri, D.C.
 
Subject pollination, plant growth regulators, trace elements, fruit set, yield increases, horticulture, quality controls, litchi
 
Description The present investigation was undertaken at Horticultural Research Centre, Patharchatta and
Department of Horticulture, G. B. Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar (Uttarakhand) in the year 2013 to 2015. Four litchi cultivars namely; ‘Rose Scented’, ‘Calcuttia’, ‘Early Seedless’ and ‘Late Seedless’ were selected for the study. Findings of the present investigation revealed a wide range of variability with respect to flowering attributes. The cultivar Rose Scented has been found superior with respect to earliness and recorded the highest pooled values of the flowering and pollen attributes i.e., panicle width (26.65 cm), number of imperfect hermaphrodite female flowers (299.50), imperfect hermaphrodite male flowers (294.62), total number of flowers (864.87), style length (3.12 mm), polar length (29.87 μm), equatorial diameter (16.06 μm) and P/E ratio (1.86) of pollen grains in imperfect hermaphrodite male flowers, pollen viability in male (66.90%) and imperfect hermaphrodite male flowers (81.96%). The cultivar Calcuttia recorded the maximum panicle length (34.89 cm), number of male flowers (277.87), number of anthers in male (7.87) and imperfect hermaphrodite male flowers (7.37), stamen length in male (7.76 mm) and imperfect hermaphrodite male flowers (5.72 mm). Under the pollination studies, the various methods of pollinations viz., self, cross and open pollination were compared. The results of the pollination studies demonstrated that the effect of self, cross and open pollination had a significant effect on fruit set, fruit retention and quality attributes of different litchi cultivars. Among the pollination methods, the pooled analysis showed the maximum final fruit retention (24.68%), fruit length (3.66 cm), fruit weight (24.33 g), fruit volume (23.75 ml), peel weight (5.87 g), aril weight (18.66 g), TSS (21.91 oBrix), TSS/ acid ratio (47.55), ascorbic acid (27.62 mg/100g), total sugar (15.03%), reducing sugar (12.68%) and non-reducing sugar (2.74%) was recorded in cross pollination methods, while maximum initial fruit set (72.78%), aril-seed ratio (22.41) and titratable acidity (0.59%) was estimated under self pollination methods. The open pollination methods recorded the maximum fruit width (3.00 cm) and specific gravity (1.04 g/ml). Studies on the effect of plant bio-regulators and micronutrient reveals the foliar application of plant bio-regulators (GA3 @ 5 ppm, GA3 @ 10 ppm, Putrescine @ 2.5 ppm, Putrescine @ 5 ppm and Putrescine @ 10 ppm) and micronutrient (Boric acid @ 1000 ppm and Boric acid @ 2000 ppm) significantly improved the fruit set, yield and quality attributes of different litchi cultivars. The pooled analysis showed the maximum initial fruit set (50.70%), final fruit retention (32.15%), fruit yield (37.65 kg/tree), fruit weight (22.65 g), fruit volume (22.03 ml), peel weight (3.76 g), aril weight (16.54 g), arilseed ratio (10.91), TSS (21.23 oBrix), TSS / acid ratio (52.89), ascorbic acid (28.10 mg/100 g), total sugar (14.19%) and reducing sugar (11.66%) recorded under the application of boric acid (2000 ppm). The minimum fruit drop (67.85%), fruit cracking (13.70%) and titratable acidity (0.36%) was also estimated under boric acid (2000 ppm). Most of the yield and quality parameters were found superior in cultivars Rose Scented and Late Seedless as compared to the other litchi cultivars. Thus, it can be concluded that boric acid (2000 ppm) in cultivar Rose Scented estimated the highest initial fruit set (67.43%), TSS (22.08 oBrix) and ascorbic acid (30.81 mg/100 g), while the putrescine (10 ppm) in cultivar Late Seedless recorded the minimum fruit drop (64.93%) and maximum final fruit retention (35.06%).
 
Date 2016-12-05T14:12:37Z
2016-12-05T14:12:37Z
2016-01
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/89190
 
Language en
 
Format application/pdf
 
Publisher G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)