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Influence of preharvest factors under greenhouse conditions on postharvest life of cut roses

KrishiKosh

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Title Influence of preharvest factors under greenhouse conditions on postharvest life of cut roses
 
Creator R, Nagaraju
 
Contributor D.P, Kumar
 
Subject developmental stages, biological development, harvesting, roses, irrigation, planting, yields, relative humidity, nutrients, budding
 
Description The present investigation was carried out during the year 2009 - 2011 to assess
the influence of preharvest conditions on the growth and post harvest quality in seven
commercially important hybrid tea rose varieties grown in greenhouses, at two
commercial export oriented rose units.
Pre and postharvest observations were recorded for the selected varieties viz.,
Avalanche, Grand Gala, Noblesse, Bugati, First Red, Gold Strike, and Corvette at both
the experimental locations for four successive growth cycles. Temperature and relative
humidity were recorded with pre calibrated data loggers at half hour intervals; light
intensity was recorded at 1300 hour of the day for entire growth cycle with lux meter.
Water quality, soil and leaf nutrient status was also taken up.
Among the varieties tested var. Grand Gala required the maximum number of
days (60-70) to complete the growth cycle under low temperature conditions (20.9oC)
during December and January months at location 2, whereas the same variety took fewer
days (37) to harvest when grown in the months of April and May at location 1. Similarly
fresh weight of the harvested stems (40 cms) was maximum in Bugati (28.48 g/flower) in
cycle IV where it took more number of days to complete growth cycle coupled with low
temperature. At location 2, maximum fresh weight was recorded in Avalanche (24.26
g/flower) and was followed by Gold Strike (22.56 g/ flower). The minimum weight
(12.52 g/flower) was recorded in Grand Gala in cycle III.This variety produced more
blind shoots (20.5 to 21.7 %) during the winter months (cycle IV) at both the locations.
The higher yields were recorded with high leaf nitrogen content irrespective of the
varieties and locations.
Petal blackening was observed in the varieties Grand Gala and First Red during
the cooler growing cycle IV (Dec - Jan). A higher percentage of bent necks were
recorded with Noblesse and Bugati even from 3rd day onwards in vases and var.
Avalanche performed poorly even without opening of second order petals, the entire bud
withered without any of the petals opening. Fully expanded flower (100 % refluxed petals
showing center) was observed in Gold Strike. Among the varieties tested in four growth
cycles at two locations, the vase life of Corvette was found to be better with 7 to 8 days
when only tap water was used as vase solution.
 
Date 2016-05-17T09:34:04Z
2016-05-17T09:34:04Z
2011-09-17
 
Type Thesis
 
Identifier Th-10143
http://krishikosh.egranth.ac.in/handle/1/65999
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru