DEVELOPMENT OF RIDGE-VENT TYPE NATURALLY VENTILATED NET-CUM-POLYHOUSE AND ITS PERFORMANCE FOR CAPSICUM PRODUCTION 1796
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Date
2013-01
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JAU,JUNAGADH
Abstract
An experiment on development of a ridge-vent type naturally ventilated
riet"Cum-polyhouse and its performance on capsicum (^Cdpsicum dnnuum l.)
production during December 2011 to May 2012 was conducted at the farm of
Dept. of RE&RE, located at Junagadh Agricultural University, Junagadh
(21.5°N, 70.1 °E). For experimental study, a naturally ventilated net-cumpolyhouse
having size (12.1 m x 4.86 m) with ridge-vent was constructed at
the experimental site. The experiment was laid out in two-factor split-plot
design with three replications comprising of total six treatment combinations.
Irrigation was the main factor with irrigation levels i.e. IW:CPE ratio, \^ = 0.6, I2
= 0.8 and I3 =1.0 whereas mulching was the sub-factor with Mi = normal black
plastic mulch and Mo as no mulch (bare soil). The daily environmental
parameters I.e. ambient temperature, relative humidity and solar radiation and
soil parameters as soil temperature were taken and computed mean,
average was used for the analysis. The response of capsicur
evaluated in terms of plant height, number of flowers per pli^^,
fruits per plant, weight of fruits per plant and yield per treatmerl
analysis was also done to determine to financial viability of the
During the crop season, the average of mean weekly
reduction, increase in relative humidity and reduction in solar radiation
between external and internal environment of the structure was found as
5.3 °C, 17.35 % and 65.3 % respectively. The soil temperature was found
highest in treatment hMi i.e. IW; CPE ratio 0.6 + Mulch where as it was found
lowest in the treatment I3M0 i.e. IW:CPE ratio 1.0 + No mulch during the crop
period. There was no effect of the treatments, either alone or in combination,
on the plant height. All the three levels of irrigation were at par with each other
in terms of the number of flowers and number of fruits but effect of mulch was
significant on both number of flowers and number of fruits. Irrigation levels
and mulch, individually and in interaction, had a significant effect on the
weight of fruits. The treatment I3M1 i.e. IW:CPE ratio 1.0 + Mulch was highly
superior as compared to the other treatment combinations. The highest
benefit cost ratio and lowest payback period was found for I3M1 as 5.07 and
2.6 years respectively.
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Keywords
RENEWABLE ENERGY AND RURAL ENGINEERING