STANDARDISATION OF AGRO TECHNIQUES FOR TOMATO PRODUCTION IN NATURALLY VENTILATED POLYHOUSE
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Date
2016-01
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CSKHPKV, Palampur
Abstract
ABSTRACT
The present investigation entitled “Standardisation of agro techniques for tomato production in
naturally ventilated polyhouse” was conducted at the Research Farm of Department of
Agricultural Engineering, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur during
summer season of 2013 and 2014 in two separate experiments inside the naturally ventilated
polyhouses. In the first experiment, treatments comprised of three dates of transplanting (15th
March, 30th March and 15th April), two spacings (60 cm x 30 cm and 75 cm x 30 cm) and two
training systems (two shoots and three shoots) was laid out in a randomized block design with
three replications. Plant grown on 15th March recorded significantly higher dry matter
accumulation, more number of fruits per plant, fruit weight, fruits per cluster, fruit length, fruit
width, fruit yield per plant (2.04 kg in 2013 and 2.22 kg in 2014), fruit yield kg/100 m2
(1007.5
kg/ha in 2013 and 1100.3 kg/ha in 2014) and benefit: cost ratio than other dates of planting during
both the years. Plants grown at wider spacing of 75 cm x 30 cm took significantly lesser number
of days for flower initiation, 50 per cent flowering, fruit setting and days to first picking, more
number of fruits per plant (25.1 in 2013 and 28.9 in 2014) and highest yield per plant (1.81 kg in
2013 and 1.91 kg in 2014) than 60 cm x 30 cm spacing. The maximum fruit yield kg/100 m2
(887.2 kg/100 m2
in 2013 and 968.6 kg/100 m2
in 2014) was recorded under closer spacing of 60
cm x 30 cm. Plant spacing of 60 cm x 30 cm recorded maximum benefit: cost ratio (1.21 in 2013
and 1.24 in 2014) over 75 cm x 30 cm plant spacing. With regards to the number of shoots per
plant, the treatment two shoots per plant recorded significantly higher yield and yield attributes
with maximum net returns and benefit: cost ratio than plants trained to three shoots. In the second
experiment, treatments comprising three hybrids (Avtar, Rakshita and Naveen 2000 plus), three
fertigation levels (NPK @ 20:20:20 g/m2
, NPK @ 25:25:25 g/m2
and NPK @ 30:30:30 g/m2
) and
two growing media (vermicompost and cocopeat: vermicompost) was laid out in a randomized
block design with three replications. Amongst the hybrids, Naveen 2000 plus was significantly
superior over other hybrids in respect of number of fruits per plant, fruit weight, harvest duration,
fruit yield per plant (1.98 kg in 2013 and 2.21 kg in 2014) with maximum net returns and benefit:
cost ratio. Fertigation of NPK @ 30 g/m2
took significantly lesser number of days for flower
initiation, 50 per cent flowering, fruit setting and days to first picking, significantly higher
number of fruits per plant, fruit yield per plant and fruit yield kg/100m2 with maximum returns
than other levels of NPK. Plants grown in growing media cocopeat: vermicompost (1:1 v/v)
recorded significantly higher yield and yield attributes than vermicompost
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