Effect of Plant Growth Regulators and Micro-nutrients on Vegetative Growth, Flowering and Yield Attributes of Litchi (Litchi chinensis Sonn.)

Abstract

The experiment was conducted to observe the effect of plant growth regulators (GA3 and NAA) and micro-nutrients (ZnSO4 and Borax) on vegetative growth, flowering and yield attributes of litchi (Litchi chinensis Sonn.). ZnSO4 applied @ 0.4% resulted in maximum per cent increase in plant height and canopy spread, i.e. 5.78% and 6.65% respectively. Whereas, application of Borax @ 0.4% exhibited maximum per cent increase in plant girth (8.72%). NAA @ 2.5 ppm was effective in improving the flowering parameters of litchi. With respect to physical parameters of fruit and yield component, application of borax @ 0.4% resulted in maximum fruit set (43.76%), number of fruits per tree (1128.67), fruit yield (25.11 kg/tree), fruit weight (22.24 g), aril weight (15.65 g) and minimum fruit cracking (5.08%). Lowest fruit drop percentage (60.91%) was however caused by application of ZnSO4 @ 0.4%.

Influence of GA3 and ZnSO4 on Fruiting, Yield and Quality Parameters of Litchi (Litchi chinensis S.) cv. Dehradun

“…The maximum (19.65 and 20.13%) sugar acid ratio were presented with control (G 0 Z 0 ) during both the years of experiments. These findings are in accordance with the reports of Kaur [11], Megu et al [5]…”

“…The maximum (0.63 and 0.63%) acidity at harvesting was presented with control (G 0 Z 0 ) during both the years of experiments. These findings are in accordance with the reports of Megu et al [5] and Kaur [11] in litchi. This means that the presence of GA at the high concentration with zinc sprays tended to decrease juice acidity.…”

“…Interactive effect GA and Zinc in the ascorbic acid content of litchi fruits might be due to increased synthesis of metabolites which can stimulate the synthesis of the ascorbic acid precursor. These findings are in accordance with the reports of Devaraja et al [12], Megu et al [5] in litchi.…”

“…Rapid fruit development and the greater mobilization of food materials from the site of production to storage organs under the influence of zinc and GA. These results are in accordance with the reports of Megu et al [5] in litchi, Singh et al [7] in mango and Tripathi and Shukla [8] in strawberry.…”

Effects of Naphthalene Acetic Acid and Zinc Sulphate on Fruiting Behavior and Quality of Litchi (Litchi chinensis Sonn.) cv. Rose Scented

“…The control group (N0Z0) was used to demonstrate the greatest acidity at harvest (0.628 and 0.617 percent) in both trial years. These results are consistent with the reports in Singh et al [13] in mango, Litchi by Saraswat et al [7], and Megu et al [17], Tripathi et al [18] in aonla. This indicates that juice acidity was inclined to be reduced by the high quantity of NAA present in the zinc sprays [19].…”