crop regulation methods on growth and productivity of guava cv. Pant Prabhat under high density planting
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Date
2014-06
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Crop regulation and high density planting is the need of present situation in commercial cultivation of guava fruits. The current experiment entitled “Response of crop regulation methods on growth and productivity of guava cv. Pant Prabhat under high density planting”, conducted during 2013-2014 in Horticulture Research Centre, Pattharchatta of Pantnagar was aimed at standardization of the best method of crop
regulation in guava under high density planting in tarai conditions of Uttarakhand. Ten different treatments were used during the period of investigation viz. NAA spray @ (400, 600 and 800) ppm, Urea spray @ (10 and 15)% twice at fifteen days interval, Pruning (one leaf pair and two leaf pair), flower bud thinning by hand (without and with removal of terminal leaf) and control. The experiment was conducted in RBD
(Randomized block design) with four replication of each treatment. The overall yield was high in control trees but the poor quality fruits and low price in rainy season decreased the net profit. NAA @ 800 ppm was found effective in reduction of rainy season crop and produced maximum yield in winter season after one leaf pair pruning but because of high cost of chemical the net profit was low. Better quality fruits were obtained in winter season compared to rainy season under different treatments in terms of both physical (fruit length, fruit breadth, fruit weight and fruit volume) and physico-chemical parameters (TSS, total titrable acidity, reducing sugar, non-reducing sugar and TSS: acid ratio). Plants with one leaf pair pruning recorded maximum TSS and ascorbic acid along with maximum yield and fruit weight in winter season, high net return (Rs.194133.07) and B: C ratio (2.20) followed by flower bud thinning by hand with removal of terminal leaf (Rs. 163708.96 and 1.95 respectively) during the experimental period. In this regard one leaf pair pruning was the best and most economic method of crop regulation followed by hand deblossoming with removal of terminal leaf in guava cv. Pant Prabhat under high density planting.
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