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Effect of growth retardant and nipping on growth and yield parameters in cowpea

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Title Effect of growth retardant and nipping on growth and yield parameters in cowpea
 
Creator Prashanth Reddy
 
Contributor B.T.Ninganur
 
Subject Crop Physiology
 
Description A field experiment was conducted at Main Agricultural Research Station, Dharwad,
University of Agricultural Sciences, Dharwad during Kharif 2004, to know the effect of growth
retardants viz., MC, MH, Linhosin and Nipping on growth, morphophysiological characters, seed
quality, yield and yield components in cowpea (Cv. C-152). The experiment was laid out in RBD
with three replications. The treatments were imposed at 35 DAS.
Results revealed that all the treatments reduced the plant height and increased the number of
branches. The minimum plant height was recorded in MH (500 ppm) followed by Lihocin (1000
ppm).
The dry weight of leaf, stem and pod increased due to application of growth retardants and
nipping operations. The dry matter distribution was more in leaf at 30 DAS and 60 DAS where as at
90 DAS and at harvest it was more in pod. In general the leaf area was increased up to 60 DAS and
decreased thereafter. Maximum leaf area was observed in nipping (at tendril formation stage) while
least in control. At 90 DAS significantly more LAI was observed in nipping (at tendril stage)
followed by nipping (at two week after tendril formation stage) and Lihocin (500 ppm).
The AGR different significantly at 60-90 days it was highest in MC (1000 ppm) followed by
MC (500 ppm). In all the treatments CGR increased over control and was highest in MC (1000
ppm). At 60 DAS to 90 DAS RGR was significantly more in MC (1000 ppm).
At 60 DAS, MC (1000 ppm) recorded significantly more chlorophyll ‘a’ chlorophyll ‘b’ and
total chlorophyll.
The yield contributing characters, viz., seed yield per plant, number of pods per plant, seed
per pod, 100 seed weight and pod length increased significantly due to growth retardants and nipping
operations. Among the treatments MC (1000 ppm) nipping (at one week after tendril formation
stage) and MC (500 ppm) recorded significantly more seed yield than other treatments.
Although MC (1000 ppm) recorded highest seed yield, MC (500 ppm) followed by nipping
(at one week after tendril formation stage) were found to be economical as they recorded highest
benefit cost ratio (2.7 and 2.6 respetively).
 
Date 2016-10-18T10:14:52Z
2016-10-18T10:14:52Z
2006
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/80785
 
Format application/pdf
 
Publisher UAS, Dharwad