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Study of dewfall in mustard canopy and its effect on growth and yield

KrishiKosh

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Title Study of dewfall in mustard canopy and its effect on growth and yield
 
Creator Bharadwaj, Jyoti
 
Contributor Surender Singh
 
Subject Climatic factors, Crops, Irrigation, Developmental stages, Planting, Biological development, Mustard, Land resources, Sowing, Yields
 
Description The present investigation entitled, “Study of dewfall in mustard
canopy and its effect on growth and yield” was conducted at Research
Farm of Dept of Agril Meteorology, CCS Haryana Agricultural University,
Hisar located at 29010’ N latitude, 75046’ E longitude and 215.2 m amsl
altitude. The experiment was laid out in randomized block design with
five replications during rabi season of 2006-07. The treatments
comprised of open and dew sheltered mustard crop with normal (2
irrigations) and terminal moisture stress (1 irrigation).
The total dew amount in the entire crop season ranged between
95.99 mm in open irrigated crop and 92.51 mm in open stressed crop. In
dew sheltered conditions, the total dew amount recorded was 3.52 mm in
sheltered irrigated and 2.86 mm in sheltered stressed crop. Maximum
dew events (30) were observed in November month in the open crop. In
sheltered crop, the highest (10) events were observed during December
month. There were total 124 dew events observed in open crop during the
entire growing season. Among the various phenophases, the higher dew
amounts i.e. 36.97 and 34.43 mm was received in open irrigated and
open stressed crop, respectively during seed filling stage. The number of
dew nights occurred during seed development phase was higher;
however, the dewfall per night was more during flowering stage. The more
number of dew events (47) were observed during seed development stage
in open crop as compared to other growth stages. The GDD, PTU and
HTU calculated were more in open crop when compared to dew sheltered
fields at all growth stages owing to longer duration taken to attain
various phenophases.
The meteorological parameters viz., evening relative humidity
(0.98), minimum temperature (-0.82) and wind speed (-0.89) were
significantly associated with dew occurrence. Minimum temperature,
evening time relative humidity and wind speed parameters gave fair
estimate of dewfall with R2 values of 0.82.
There was significant difference between the duration of attaining
different phenophases and maturity under various treatments. Total dry
biomass (980 g/m2) and siliquae biomass (412 g/m2) was significantly
higher in open irrigated conditions when compared to open stressed
treatments at physiological maturity. Biological (8948 kg/ha) and seed
yield (2152 kg/ha) were significantly higher in open irrigated crop when
compared to terminally stressed crop.
It can be concluded that there were significant variations in dew
climatology in open and sheltered mustard crop. However, dewfall
contribution in mustard’s growth and development characteristics under
Hisar conditions was not so significant because of moisture contribution
from higher water table and rainfall. Input parameters viz., minimum
temperature, relative humidity (evening) and wind speed gave a good
estimate of dewfall (R2 =0.82), thus, may be used for prediction of dew
occurrence and subsequent management of dew oriented plant protection
measures in mustard crop.
 
Date 2016-11-24T14:28:28Z
2016-11-24T14:28:28Z
2007
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/87421
 
Language en
 
Format application/pdf
 
Publisher CCSHAU