STUDIES ON NEXT GENERATION TECHNOLOGY FOR NUTRIENT AND WATER MANAGEMENT IN MAIZE (Zea mays L.) – LABLAB (Lablab purpureus L.) CROPPING SYSTEM
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Date
2022-02-17
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University of Agricultural Sciences, Bangalore
Abstract
A field experiment on next generation technologies for nutrient and water
management in maize-lablab cropping sequence was carried out during 2019-20 and
2020-21 at agroforestry field unit, UAS, GKVK, Bengaluru. The experiment consisted of
twelve treatments replicated three times, assigning three levels of irrigation in main plot
with four nutrient management practices in sub plots was laid out in a split plot design.
The results revealed, that sensor based drip irrigation at 50 per cent depletion of available
soil moisture (DASM) along with nutrient expert software based nutrient management
approach in maize at harvest recorded significantly higher leaf area (9020 cm2 plant-1),
total dry matter production (435.53 g plant-1), kernel yield (9725 kg ha-1) and stover yield
(10352 kg ha-1) on pooled basis during kharif. Treatment received surface irrigation along
with recommended dose of fertilizers recorded significantly lower leaf area (5817 cm2
plant-1), total dry matter production (271.79 g plant-1), kernel (6916 kg ha-1) and stover
yield (7820 kg ha-1). After harvest of the maize, lablab was grown as residual crop during
rabi and the results revealed that at 90 DAS, sensor based drip irrigation at 50 per cent
DASM recorded significantly higher leaf area (797.2 cm2 plant-1), total dry matter (36.54
g plant-1), green pod yield (4647 kg ha-1) and haulm yield (5623 kg ha-1) on pooled basis
as compared to surface irrigation. The nutrient management using nutrient expert saved
26.6 and 20.0 per cent nutrients as compared to recommended dose of fertilizer. Sensor
based drip irrigation saved 32.6 and 32.2 per cent of irrigation water as compared to
surface irrigation during first and second year, respectively.