Vol. 7, Issue 4 (2019)
Fruit cracking, marketable yield and quality of litchi is influenced by foliar sprays of NAA and boron
Author(s): Sopal Singh and JP Singh
Abstract: An experiment was conducted at Horticulture Garden, Department of Fruit Science, Chandra Shekhar Azad University of Agriculture & Technology Kanpur (U.P.) during two concutive years 2017-18 and 2018-19. Factorial Completely Randomized Design was used with three replications and sixteen treatments viz. four levels each of NAA (0, 30, 60 and 90 ppm) and Boron (0, 0.2, 0.4 and 0.6%) and their combination. Spraying were done twice i.e. before flowering and at pea stage. Sprays of 60 ppm NAA significantly maximized marketable yield (70.03 and 73.40 kg per plant), T.S.S. (19.67 and 20.17 0brix), total sugar (13.23 and 13.57%), juice content (59.87 and 61.46%), sugar/acid ratio (27.81 and 28.48), vitamin-C (40.44 and 41.12 mg/100g), organoleptic rating (82.00 and 83.32), and shelf life (3.91 and 3.97 days) respectively, whereas, percentage of cracked fruit per panicle (12.57 and 9.57%) and acidity content was significantly reduced (0.478 and 0.477%) during both the years of study. NAA 90 ppm significantly reduced dry matter of fruit (17.45 and 16.54%). Boron applied at 0.4% also proved effective and significantly enhanced T.S.S. (19.80 and 20.27 0brix), vitamin-C (40.96 and 41.67 mg/100g), organoleptic score (82.36 and 83.58) and shelf life (3.95 and 4.01 days) while percentage of cracked fruit per panicle was reduced (11.52 and 8.75%). Increasing concentration of boron to 0.6% caused significant improvement in marketable yield (65.21 and 68.55 kg per plant), total sugar (13.35 and 13.68%), juice content (60.44 and 61.94%), sugar/acid ratio (26.32 and 27.31) and dry matter content in fruit (18.35 and 17.40%). However, acidity was reduced (0.508 and 0.502%) during both the years. Interactive treatments of NAA×boron caused significant increase and treatment of N2 B2 improved the attributes further showing significantly maximum sugar/acid ratio (29.93 and 30.10), vitamin-C (41.65 and 42.31 mg/100g) and organoleptic rating (85.50 and 86.74). Interactive treatment of N2 B1 revealed minimum acidity content (0.471 and 0.474%), whereas, maximum acidity was registered under N0 B0 (0.627 and 0.619%) during both the years. Treatment of N0 B3 increased dry matter content revealing 19.20 and 18.25% against the minimum of 17.20 and 16.25% expressed under N3 B0. Marketable yield was significantly greater 74.64 kg yield per plant with N2 B2 treatment during first year.
Pages: 1730-1735 | 266 Views 62 Downloads
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How to cite this article:
Sopal Singh, JP Singh. Fruit cracking, marketable yield and quality of litchi is influenced by foliar sprays of NAA and boron. Int J Chem Stud 2019;7(4):1730-1735.
