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FRACTION OF INTERCEPTED
RADIATION OF COTTON RESPONDS TO IRRIGATION AND
INTEGRATED PLANT NUTRITION
MUHAMMAD SALEEM1*,
MAHMOOD-UL-HASSAN2, SYED SARWAR ALAM2 AND ASIF
JAVAID3
Abstract:
Significant effect of
different irrigation schedules and integrated nutrition levels was
determined on fraction of intercepted radiation (Fi) in cotton. The
treatments were four irrigation schedules viz. six irrigations (I1),
three irrigations (I2), irrigation at 25 mm deficit (I3)
and irrigation at 50 mm deficit (I4), and seven integrated
nutrition levels i.e. control (N0), 75-37.5–37.5 kg NPK ha-1
(N1), 75-37.5-37.5 kg NPK ha-1 + FYM (farm yard
manure) @ 20 t ha-1 (N2), 75-37.5-37.5 kg NPK ha-1
+ wheat straw@ 5 t ha-1 (N3), 150-75-75 kg NPK ha-1
(N4), 150-75-75 kg NPK ha-1 + FYM @ 20 t ha-1
(N5), 150-75-75 kg NPK ha-1 + wheat straw @ 5 t ha-1
(N6). Positive and linear relationships were
established between Fi and total dry matter (TDM); and Fi and seed
cotton yield. Significantly higher Fi values were attained when the crop
was planted at N5 with any of three irrigation schedules viz.
I1 or I3 or I4. The highest values of
Fi (0.914 in first year and 0.913 in second year of study) were recorded
with I4N5 which were followed by I3N5
and I1N5. The interactions I4N5,
I3N5 and I1N5 harvested
23.51, 23.38 and 20.27 % greater Fi to I2N0.
1Soil Science Division, Nuclear Institute for Agriculture and Biology
(NIAB), Faisalabad, Pakistan
2Plant Breeding and Genetics Division, Nuclear Institute for Agriculture
and Biology (NIAB), Faisalabad, Pakistan
3Plant Genetic Resources Institute, National Agricultural Research Centre
(NARC), Islamabad, Pakistan
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