National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The effects of either ring basin (RB) or trunk soil line pore (TSLP) method of application of paclobutrazol (1.00-4.00 g per m canopy diameter) during September, on morphological growth, yield and fruit quality of 2 cultivars of litchi (Litchi chinensis Sonn.) were investigated during 2016-17 in subtropical climate of northern Bihar. The tree height was insignificantly affected but tree girth, canopy height reduced due to higher dose of paclobutrazol (3-4.0 g) applied through trunk soil line pore method. Application of paclobutrazol @3.0 or 4.0 g through TSLP method and 3.0 g through RB method was found to be better in reducing tree size in terms of canopy volume and diameter. Maximum panicles emerged in the canopy due to 4.0 g PBZ applied through TSLP method, this dose and methods also led to highest percentage of shoots to flower (60 %) and 3.0 g led to early emergence of panicle. TSLP method delayed (2-3 days) the panicle emergence over RB method. 4.0 g PBZ applied through TSLP method has been yielded maximum no. of fruit per tree (2567.66) while in control it was only 32-140 fruits per tree. 3.0 g PBZ was also better for enhancing yield, pulp (aril) content over untreated trees. Fruit Size was also affected by methods and doses of application of paclobutrazol but average frit weight was reduced over control due to RB methods, however fruit weight was increased by almost 10 percent over control by application PBZ @4.0 g through TSLP. Upto some extent peel (pericarp) weight got reduced due to application of PBZ through RB method with 2-3.0 g PBZ per m canopy diameter. Although, paclobutrazol had only small effect on morphological parameters but was able to enhanced flowering and yield by many fold after 3.0 or 4.0 g PBZ applied through TSLP method of application in alternate bearing litchi trees. Therefore, experiment for some more years are required to strengthened scientific argument for reducing alternate bearing tendency in litchi cv. China through application of paclobutrazol with generation of physio-biochemical data of different flushes/shoots.
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