Informatics Publishing Limited

Ravindra Kumar ¹, S. Ganesh ², R. Chithiraichelvan ¹, K. K. Upreti ³, V. V. Sulladmath ¹

Affiliations
1 Division of Fruit Crops, ICAR - Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru-560 089, IN
2 Gandhigram Rural Institute (Deemed University), Gandhigram, Dindigul-624302, Tamil Nadu, IN
3 Division of Plant Physiology and Biochemistry, ICAR - Indian Institute of Horticultural Research, Bengaluru-560089, IN

Abstract

The effects of tree spacing (5x2m, 5x2.5m, 5x3m, 5x3.5m and 5x4m) and pruning (8 buds/cane, 6 buds/cane and 4 buds/cane) on vegetative growth, physiological parameters, fruit yield and quality were studied in fig (Ficus carica L.) cv. Deanna in the 3^rd and 4^th year of its growth during the period 2010-12. It was observed that with increase in tree spacing, growth parameters like leaf number, shoot length, internode length, tree-spread, tree height and tree circumference, along with fruit yield both in terms of fruit number and fruit weight per tree, declined gradually under different pruning levels. Increase in pruning level from 8 buds/cane to 4 buds/cane resulted in increased leaf number, shoot length and internode length. Yield characters, viz., fruit number/tree, fruit weight/tree, fruit number/hectare and fruit weight/hectare were marginally influenced by pruning. However, interaction effects of pruning and spacing were found to be non-significant. Consistently declining trends in photosynthesis rate and stomatal conductance, along with increase in leaf water potential value were observed with increase in spacing. Effects of spacing were more conspicuous than those of pruning. Best results for maintenance of vigour and fruit yield were observed under a spacing of 5x2m or 5x2.5m, and 4 buds/cane pruning. Although there was reduction in average fruit size under closer spacing when compared to wide spacing, fruit quality attributes like TSS and acidity were not affected by various treatments. Effects of closer spacing on growth and yield parameters were more pronounced in the 3^rd year as compared to the 4^th year, showing better response to treatments in young trees. Fruit yield calculated on per hectare basis showed highest fruit number of 116500-133750 and 274500-299500, and fruit weight of 54.5-62.0 and 158.77- 173.30 quintals/ha, respectively, during the 3^rd and 4^th year of planting under closer spacing of 5x2m and 4 buds/cane pruning.

Keywords

Ficus carica, Fig Deanna, Growth, Pruning, Fruit Quality, Spacing, Yield.

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V. V. Sulladmath ¹, K. Srinivas ¹, R. H. Laxman ²

Affiliations
1 Division of Fruit Crops, Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore – 560 089, IN
2 Division of Plant Physiology and Biochemistry, IIHR, Bangalore, IN

Abstract

Four different training systems, viz., Kniffin, High trellis, Tatura and Bower were evaluated in passion fruit cv. Kaveri. Kniffin system with 4 arms recorded highest cumulative yield of 67.22 t/ha with a cost:benefit ratio of 1:4.25, followed by Kniffin 2 arm and 6 arm, respectively. Kniffin system was also the most ideal system of training for passion fruit, facilitating easy cultural operations. Although Tatura system recorded highest cumulative yield/vine (43.57kg), it registered lowest yield/ha, largely due to lower plant population/ha (1250 vines/ha). Fruit quality parameters like TSS, Vit. C, carotene content and titrable acidity were not significantly influenced by different training systems. Similarly, interception of Photosynthetically Active Radiation (PAR) by the canopy did not differ significantly among training systems. Though photosynthetic rate did not differ significantly, shaded leaves in the canopy did not contribute photosynthates and were parasitic on the vine.

Keywords

Passion Fruit, Kniffin, High Trellis, Tatura, Bower, Photosynthetically Active Radiation(PAR).

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