STUDIES ON METHOD OF PLANTING, IRRIGATION SCHEDULES, SOURCES AND LEVELS OF FERTILIZERS FOR FERTIGATION IN TOMATO (Lycopersicon esculentum Mill.) AND IT'S RESIDUAL EFFECT ON BABY CORN (Zea mays L.)"
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Date
2007-09-17
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University of Agricultural Sciences GKVK, Banglore
Abstract
Field experiments were conducted on the red sandy loam soils of Agronomy
field unit, MRS, UAS, Bangalore during 2005 and 2006 to study the effect of method
of planting, irrigation schedules, sources and levels of fertilizers for fertigation on
growth, yield and quality of tomato and its residual effect on baby. The investigation
involved two experiments. The first experiment comprised of three levels of drip
irrigation (0.6, 0.8 and 1.0 Epan) and three methods of planting (normal, two rows
paired system and four rows paired system) in randomized complete block design
with three replications. The second experiment comprised of 12 treatment
combinations with three levels of fertilizers (75, 100 and 125 % of Rec. NPK) and
four sources of fertilizers (Urea, SSP, MOP; MAP, MOP; MAP, KNO3 and soil
application of urea, SSP, MOP). After the harvest of tomato, baby com was grown to
know the residual effect of fertigation without any additional inputs.
Drip irrigation at 1.0 Epan with normal row system found superior in finit
yield (109.05 t ha"'), growth and yield attributes of tomato and was on par with 0.8
Epan two rows paired system (106.12 t ha"'). The higher B: C ratio of 5.98 was
obtained with 0.8 Epan two rows paired system. While, higher WUE (152.2 kg
ha-mm ') was registered with 0.6 Epan two rows paired system.
Fertigation with MAP, KNO3 at 125% rec. NPK was superior in total fmit
yield (116.86 t ha'), growth and yield attributes of tomato closely followed by
fertigation with Urea, SSP, MOP at 125% Rec. NPK (114.761 ha"'). Similar trend was
noticed for fertilizer use efficiency, water use efficiency and nutrient uptake. Higher
net returns ha"' was recorded in fertigation with Urea, SSP, MOP at 125 % Rec. NPK
(Rs. 5,22,493/-) with the highest B: C ratio of 6.01. Baby com yield was significantly
higher with the application of 125% Rec. NPK either through fertigation or through
soil application to the previous tomato crop.
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