STCR APPROACH FOR SOIL AND FOLIAR APPLICATION OF SOLUBLE FERTILIZERS AND THEIR EFFECT ON SOIL PROPERTIES, GROWTH AND YIELD OF MAIZE
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Date
2015-07-14
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
A field experiment was conducted during Kharif 2014 at Zonal Agricultural
Research Station, University of Agricultural Sciences, Bengaluru to study the influence
of different approaches and different forms of fertilizers on yield and nutrient uptake by
hybrid maize. The experiment was laid out in randomized block design comprising
ten treatments replicated thrice. The results revealed that significantly higher grain
(98.22 q ha-1) and stover (130.96 q ha-1) yield was recorded in 100 per cent soil test crop
response (STCR) dose applied through soluble fertilizer (SF) at three splits and three
sprays of 19: 19: 19 @ 1% concentration compared to RDF through conventional
fertilizer (CF). Significantly higher total uptake of macro, secondary and micronutrients
and higher nutrient requirement of nitrogen, phosphorus and potassium (2.75, 0.62 and
1.92 kg q-1 respectively) by maize crop was also recorded in 100 per cent STCR dose
applied through SF with three splits and three sprays. However, higher B:C ratio of 4.19
was recorded in the treatment where 100 per cent STCR dose was applied through CF.
The present study evidently concluded that soluble fertilizer application based on
STCR targetted yield approach with three splits at basal, 30 and 50 DAS along with three
sprays of 19:19:19 at 20, 40 and 60 DAS was helpful for getting higher yield of maize
crop, even though B:C ratio was lower in these treatments, mainly due to very high cost
of SF, for which no subsidy is given by the government compared to CF.
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