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STUDIES ON THE EFFECT OF ACCELERATED AGEING ON GERMINATION, VIGOUR AND YIELD OF SUNFLOWER ( Helianthus annuus L.)

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Title STUDIES ON THE EFFECT OF ACCELERATED AGEING ON GERMINATION, VIGOUR AND YIELD OF SUNFLOWER ( Helianthus annuus L.)
 
Creator RAVINDAR, VANGA
 
Contributor MURALIMOHAN REDDY, B
 
Subject STUDIES, EFFECT, ACCELERATED, AGEING, GERMINATION, VIGOUR, YIELD, SUNFLOWER,
 
Description The effect of accelerated ageing on germination,
vigour and yield of sunflower (Helianthus annuus L.) was
studied in both laboratory and field. Laboratory studies were
conducted at Seed Technology Research Project, Raj endranag ar,
Hyderabad, while field studies were conducted at College
Farm, College of Agriculture, Raj endranagar, Hyderabad, on a
clay loam soi 1 during rabi, 1988-89. The experiment was laid
out in randomized block design (factori a 1) replicated thrice
w"ith four varieties (MSFH-1 ,MSFH-6,MSFH-8 and MSFH-17) and
five treatments (A1M1 =seed with 15+0.4% moisture and stored
at 20 °C for 7 days, A2M1 =seed with 15+0.4% moisture and
0 0 stored at 20 C for 14 days; A1M2 =seed stored at 40+1 C
temperature and 85+2% relative humidity for 7 days; =
seed stored at 40+1°C temperature and 85+2% relative humidity
for 14 days and control).There was a reduction in germination per cent by
both the methods of accelerated ageing in all the cultivars.
Seed stored with high moisture and at low temperature had
lesser effect on germination per cent than seeds stored at
high temperature and high relative humidity. increase in
duration of the treatment resulted greater effect of the
treatment.Among cultivars more reduction in germination was
noticed in MSFH-6 and MSFH-8 than MSFH-1 and MSFH-17. Complete
loss of germinability resulted in MSFH-8 when seeds
stored at high temperature (40~1°C) and high relative
humidity (85+2%) for 14 days.Reduction in germination was associated with
increase in abnorm-al seedlings. The reduced germination
levels resulted in reduced seedling vigour, decline in rate
of emergence, plant height, number of l ~ eaves and leaf area
per plant, delayed flowering and maturity, reduction in head
diameter, filled seed per head, 100 seed weight and per plot
yield. This reduction was noticed in all cult i vars but MSFH-6
and MSFH-8 were more affected, by very low germination levels
obtained by accelerated ageing, than MSFH-1 and MSFH-17.The per cent decline in yield from control to
accelerated ageing treatments (low germination levels) was
minimum in ~M 1 (13.06), intermediate in both A1M2 and A 2 M1
(23.13) and maximum in ~M2 was (43.06) and the germination
levels were closely correlated to yield in all the cultivars
studied.
 
Date 2016-08-16T14:52:22Z
2016-08-16T14:52:22Z
1990
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/72623
 
Language en
 
Relation D3344;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD.