Record Details

INFLUENCE OF SPACING, NUTRITION AND PRUNING ON CERTAIN MORPHOLOGICAL, PHYSIOLOGICAL AND BIOCHEMICAL ASPECTS IN Jatropha curcus L.

KrishiKosh

View Archive Info
 
 
Field Value
 
Title INFLUENCE OF SPACING, NUTRITION AND PRUNING ON CERTAIN MORPHOLOGICAL, PHYSIOLOGICAL AND BIOCHEMICAL ASPECTS IN Jatropha curcus L.
 
Creator VIJAYA KUMAR, P
 
Contributor SIVA SANKAR, A
 
Subject SPACING, NUTRITION, PRUNING, MORPHOLOGICAL, PHYSIOLOGICAL, BIOCHEMICAL
 
Description Certain morphological, physiological and biochemical aspects in Jatropha
curcus L. as influenced by pruning, spacing and nutrition were investigated in 3-4
year plantation during June 2007 to June 2008 at students farm, Rajendranagar,
Hyderabad. Plant spread was higher in unpruned with 3x4m spacing while in stem
girth and number of branches per plant there were marginal differences between
pruned and unpruned treatments. Fertilizer application with FYM +NPK recorded
maximum values of plant spread, stem girth and number of branches per plant at all
stages of monthly samplings. Among spacings, plant spaced at 3x3m recorded
significantly higher number of branches per plant over 3x4 m spacing and 3x5m
spacing by June 2008.
Observations on flowering in terms of number of clusters per plant, total
number of flowers (male and female) per cluster, total number of flowers per plant,
total number of female flowers per plant and numbers of capsules per plant were
examined at monthly intervals. In general, flowering was maximum during monsoon
season (June and July) later declined to about 25% in September and ceased
thereafter.Flowering did not occur from October-December. From January there was
rejuvenation of both vegetative and reproductive growth (inflorescence)
simultaneiously, the later reaching to higher level in June 2008. Pruning resulted in
marginal increase of number of flowers per clusters, total number of flower ( male
and female ) per cluster, total flowers per plant and capsules per plant at all stages.
Among spacings, plants at 3x3m spacing exhibited higher values of number of
clusters per plant, total number of flowers (male and females) per cluster, total
number of flowers per plant and total number or capsules per plant. Among fertilizer
treatments, FYM+NPK consistently recorded significantly higher values in number
of clusters per plant, number of flowers per cluster, total number of flowers per plant
and total number of capsules per plant compared to control followed by NPK and
FYM at all stages of sampling June 2007-June2008. In terms of female flowers per
plant, plants spaced at 3x3m and those received FYM+NPK found to have
maximum number of female flowers per plant at all stages of sampling.Though
flowering occurred from January onwards, capsules which give final yield are not
formed up to March, therefore number of capsules per plant formed in August 2007
followed by September contributed to yield. Among treatments pruning had no
significant influences on the number of capsules per the plant. On the other hand
among spacing treatments plant spaced at 3x3m recorded higher number of capsules.
Among fertilizer application FYM+NPK recorded significantly higher number of
capsules per plant followed by NPK and FYM compared to control.
Leaf area index (LAI), Photosynthetic rate, SPAD Chlorophyll meter
reading, Chlorophyll Fluorescence, RWC and leaf temperature were examined in
leaves from upper, middle and lower strata at monthly intervals. Irrespective of
treatments LAI values increased from June2007 to August 2007 and thereafter
declined. Complete leaf fall was recorded in October and continued up to December,
hence no LAI was recorded. There was rejuvenation of growth gradually from
January 2008 with slow increase in LAI reaching maximum values in June 2008.
Pruning had no influence while 3x3m spaced plants always exhibited significantly
higher LAI. Among fertilizer treatments FYM+NPK treatments resulted in
significantly higher LAI at all stages over control.
Photosynthetic rate (Pn), SPAD chlorophyll meter reading (SCMR),
Chlorophyll fluorescence (Fv/Fm ratio) examined in June to September 2007 and
January to June 2008 showed no significant differences with respect to pruning and
spacing treatments, in contrast, plants received FYM+NPK exhibited higher values
of Pn in all the strata compared to control at all stages of samplings (June 2007 to
June 2008). Similar trend was noticed with SCMR.
Chlorophyll fluorescence which is a measure of photochemical efficiency of
Photosystem II varied significantly only with respect to fertilizer treatments, values
were always lower in control plants (no fertilizer) irrespective of pruning and
spacing at all samplings. Relative water content and leaf temperature did not vary
among treatments. Nitrate reductase activity, the key enzyme for nitrogen
metabolism examined in leaves of upper, middle and lower strata was found to be
non significant with respect to pruning while plant spaced at 3x3m and with received
FYM+NPK fertilizer, exhibited significantly higher NRA at all samplings.
N, P and K content at maximum LAI in the leaves of upper, middle and
lower strata were maximum in plants treated with FYM+NPK compare to control
(no fertilizer).
Seed yield per plant and per hectare basis showed no significant difference
with respect to pruning. Plant spaced 3x3m recorded higher seed yield followed by
3x4m and 3x5m. FYM+NPK recorded maximum seed yield compared to control
(250%) followed by NPK and FYM (110% and 85%) respectively in 2007.
Seed oil content did not differ with respect to pruning and spacing, while
fertilizer had a significant influence. Plants treated with FYM+NPK recorded 19%
higher seed oil content compared to control followed by NPK alone (13-15%) in
2007 and 2008. Seed oil yield on plant as well as per hectare basis were marginally
higher in pruned plants. Among spacing treatments plants spaced at 3x3m and
among fertilizer treatments plants treated with FYM+NPK recorded maximum seed
oil yield. Interaction involving fertilizer was found to be significant for
physiological and yield parameters irrespective of pruning and spacing at all stages.
 
Date 2016-07-30T14:38:10Z
2016-07-30T14:38:10Z
2008
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/70322
 
Language en
 
Relation D8341;
 
Format application/pdf
 
Publisher ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD