Effect of girdling on vegetative, fruiting and quality attributes of litchi (Litchi chinensis Sonn.) cv. Calcuttia
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Date
2023
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Punjab Agricultural University
Abstract
The present study was carried out during the year 2021-23, to evaluate the effect of different levels of girdling on vegetative, fruiting and quality attributes of litchi (Litchi chinensis Sonn.) cv. Calcuttia at M S Randhawa Fruit Research Station, Gangian. The girdling of 25% and 50% of primary branches was done in the first fortnight of October at three thickness levels namely 2mm, 4mm and 6mm and girdled trees were compared with control trees. In regard of photosynthesis parameters and enzymatic activity, different girdling treatments significantly reduced the leaf stomatal conductance, transpiration rate, internal CO2 concentration and net photosynthesis while enzymatic activity was significantly increased in girdled trees as compared to control. Highest fruit drop percentage (58.43%) was recorded with girdling of 50% primary branches with 2mm intensity. Fruit yield was increased by 14.11%, 33.41% and 4.50% for 2mm, 4mm and 6mm girdling of primary branches, respectively. Fruit weight (25.53g), pulp weight (18.14g), pulp-stone ratio (6.17) and anthocyanin content (9.93mg/100g) were found maximum in girdling of 50% of primary branches with 4mm thickness. The fruits with higher physico-chemical parameters viz. TSS, acidity and sugars content were observed in girdling of 25% of primary branches with 6mm thickness. Likewise, K, Fe and Mn (leaf, peel and pulp) content was increased with various girdling treatments as compared to control. It is concluded that 50% girdling of primary branches with 4mm girdling thickness improved fruit yield and physico-chemical characteristics in litchi cv. Calcuttia.
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Pawneet Kaur (2023). Effect of girdling on vegetative, fruiting and quality attributes of litchi (Litchi chinensis Sonn.) cv. Calcuttia (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.