Critical Stages For Scheduling Irrigation In Mustard Brassica Juncea
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Date
1985
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Sardarkrushinagar Dantiwada Agricultural University,Sardarkrushinagar
Abstract
4r investigation was conducted at the Agricultural
School Farm of the Gujarat Agricultural University,
Jagudan (Dist. Mehsana), on sandy loam soil during the
rabi season of the year 1982-83 with a view to determine
the optimum frequency of irrigation and to findout the
critical physiological growth stages of mustard in relation
to moisture stress under limited water supply. Consumptive
use of water and water requirement by mustard were also
studied at various physiological stages.
Five crop growth stages viz., shooting, pre-flowering,
anthesis, pod setting and grain filling were tested under
eighteen different treatments which consisted of withholding
irrition at one or more of crop growth stages. The
experiment was laidout in a Randomised Block Design with
four replications. The gross and net plot sizes were
7.2 m x 3.6 in and 6.6 m x 2.7 m, respectively. In addition,
buffer strip of one meter around each experimental plot
was provided.
The relts indicated that in order to harvest
potential yield of mustard variety "Varuna" on sandy loam
soil, it is necessary to apply five irrigations during the
2
life period of the crop. There was progressive reduction
in yield and oil content with decrease in the irrigation
frequency. However, under limited available water
conditions, when it is possible to apply four, three or
two irrigations, there is no adverse effect on the
production for a partiailar irrigation frequency if
irrigation is missed during any of the physiological
growth stages. However, the situation became critical for
one irrigation. Under such a situation, the yield is
significantly reduced if irrigation is missed at anthesis
or pre-flowering stage. Hence, these stages can be
considered to be critical, When the quantity of irrigation
water is limited which may be sufficient for a single
irrigation, the potential production and profit from a
rabi crop of mustard variety tVarunat can be secured
by scheduling it at pre-flowering or anthesis stage on
sandy loam soil.
The consurptive use of water and water requirement
for mustard 'Varuna' were found to be 386 and 405 mm,
respectively
Description
STUDIES NO GROWTH YIELD AND QUALITY OF SOYBAN VARIRETIES AS INFLUENCET BY PLANT POPULATION LEVELS