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Professor Jayashankar Telangana State Agricultural University, Hyderabad (Telangana State)

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20102
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Subject: Soil Science and Agricultural Chemistry × Author: SHIVA KUMAR, B ×
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    ThesisItemOpen Access
    EFFECT OF IRRIGATION AND FERTIGATION LEVELS ON YIELD, QUALITY AND WATER PRODUCTIVITY OF RABI MAIZE IN ALFISOLS
    (ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD, 2010) SHIVA KUMAR, B; SURYANARAYAN REDDY, M
    The field experiment was conducted at WTC, College farm, College of Agriculture, Rajendranagar, Hyderabad during Rabi 2009 to study the “Effect of irrigation and fertigation levels on yield, quality and water productivity of rabi maize in Alfisols” The experiment was laid out in a split plot design consists of four main plots (irrigation levels) viz., I1 – Ridge and furrow, I2 - Drip irrigation at 1.2 E pan, I3 - Drip irrigation at 1.0 E pan and I4 - Drip irrigation at 0.7 E pan and three sub plots (fertigation levels)viz., F1 - 75 % RDF, F2 - 100 % RDF and F3 - 125 % RDF replicated thrice. The experimental soil is sandy clay loam with low in available nitrogen, medium in available phosphorus and potassium. The fertigation was scheduled once in eight days as per the treatment schedule. Drip irrigation at 1.0 E pan recorded significantly higher dry matter production and grain yield followed by drip irrigation at 1.2 E pan and drip irrigation at 0.7 E pan. Among the fertigation levels 125% RDF recorded significantly higher dry matter production (18486 kg ha-1) and grain yield (7351 kg ha-1) compare to all other treatments. The concentration and total uptake of N, P and K in (grain + stover) was significantly influenced by different methods of irrigation and fertigation levels. Drip irrigation at 1.0 E pan recorded significantly higher concentration and total uptake of N, P and K over drip irrigation at 1.2 E pan. Fertigaion at 125% RDF resulted in significantly higher total uptake of N, P and K compared to fertigation at 100% RDF and 75% RDF. Highest nitrogen, phosphorus and potassium use efficiency were registered in drip irrigation at 1.0 E pan. Lowest efficiency was recorded under ridge and furrow method. Among the fertigation levels, highest nitrogen, phosphorus and potassium use efficiency was attained with the application of 75% RDF. Lowest efficiency recorded at 125% RDF. Drip irrigation at 0.7 E pan with fertigation of 125% RDF recorded significantly higher water use efficiency (13.20 kg ha-1 mm) over drip irrigation at 1.0 E pan with fertigation of 125% RDF(10.76 kg ha-1 mm). Available N, P and K at harvest were higher at a depth of 15-30 cm in drip irrigation at 1.0 E pan over other irrigation levels. Among the fertigation levels, availability of N, P and K increased with increase in the fertigation levels and also with the progress of the crop growth from 30DAS till harvest. The quality parameters of maize like crude protein and starch content under drip irrigation at 1.0 E pan were found significantly superior over other irrigation levels and in 100% RDF over other treatments. Among drip irrigated treatments maximum net returns (Rs. 48,141ha-1) and BC ratio (2.14) was recorded in drip irrigation at 1.0 E pan with fertigation of 125% RDF and least under drip irrigation at 0.7 E pan with fertigation of 75% RDF (Rs. 27,600 ha-1; 1.26).
  • Thumbnail Image
    ThesisItemOpen Access
    EFFECT OF IRRIGATION AND FERTIGATION LEVELS ON YIELD, QUALITY AND WATER PRODUCTIVITY OF RABI MAIZE IN ALFISOLS
    (ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD, 2010) SHIVA KUMAR, B; SURYANARAYAN REDDY, M
    The field experiment was conducted at WTC, College farm, College of Agriculture, Rajendranagar, Hyderabad during Rabi 2009 to study the “Effect of irrigation and fertigation levels on yield, quality and water productivity of rabi maize in Alfisols” The experiment was laid out in a split plot design consists of four main plots (irrigation levels) viz., I1 – Ridge and furrow, I2 - Drip irrigation at 1.2 E pan, I3 - Drip irrigation at 1.0 E pan and I4 - Drip irrigation at 0.7 E pan and three sub plots (fertigation levels)viz., F1 - 75 % RDF, F2 - 100 % RDF and F3 - 125 % RDF replicated thrice. The experimental soil is sandy clay loam with low in available nitrogen, medium in available phosphorus and potassium. The fertigation was scheduled once in eight days as per the treatment schedule. Drip irrigation at 1.0 E pan recorded significantly higher dry matter production and grain yield followed by drip irrigation at 1.2 E pan and drip irrigation at 0.7 E pan. Among the fertigation levels 125% RDF recorded significantly higher dry matter production (18486 kg ha-1 ) and grain yield (7351 kg ha-1 ) compare to all other treatments. The concentration and total uptake of N, P and K in (grain + stover) was significantly influenced by different methods of irrigation and fertigation levels. Drip irrigation at 1.0 E pan recorded significantly higher concentration and total uptake of N, P and K over drip irrigation at 1.2 E pan. Fertigaion at 125% RDF resulted in significantly higher total uptake of N, P and K compared to fertigation at 100% RDF and 75% RDF. Highest nitrogen, phosphorus and potassium use efficiency were registered in drip irrigation at 1.0 E pan. Lowest efficiency was recorded under ridge and furrow method. Among the fertigation levels, highest nitrogen, phosphorus and potassium use efficiency was attained with the application of 75% RDF. Lowest efficiency recorded at 125% RDF. Drip irrigation at 0.7 E pan with fertigation of 125% RDF recorded significantly higher water use efficiency (13.20 kg ha-1 mm) over drip irrigation at 1.0 E pan with fertigation of 125% RDF(10.76 kg ha -1 mm). Available N, P and K at harvest were higher at a depth of 15-30 cm in drip irrigation at 1.0 E pan over other irrigation levels. Among the fertigation levels, availability of N, P and K increased with increase in the fertigation levels and also with the progress of the crop growth from 30DAS till harvest. The quality parameters of maize like crude protein and starch content under drip irrigation at 1.0 E pan were found significantly superior over other irrigation levels and in 100% RDF over other treatments. Among drip irrigated treatments maximum net returns (Rs. 48,141ha-1 ) and BC ratio (2.14) was recorded in drip irrigation at 1.0 E pan with fertigation of 125% RDF and least under drip irrigation at 0.7 E pan with fertigation of 75% RDF (Rs. 27,600 ha-1 ; 1.26).