Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/85414
Authors: Khelge Datturam
Advisor: G.B. Shashidhara
Title: Need-Based Nitrogen Management Using Leaf Color Chart in Sweet Corn Genotypes (Zea mays L. saccharata)
Publisher: UAS, Dharwad
Type: Thesis
Agrotags: Agronomy
Abstract: A field study was conducted during kharif 2010-11 at College of Agriculture, University of Agricultural Sciences, Dharwad to study nitrogen management in sweet corn genotypes (Zea mays L. saccharata) through leaf colour chart. Two varieties (Madhuri and Win orange ) as main plot, three LCC values (LCC 3, 4 and 5) as sub plot treatments and three nitrogen levels viz N @ 20, 30 and 40 kg ha-1 as sub-sub plot treatments were tried in split-split plot design with three replications. In addition, two controls 100% RDN were also selected. The fresh cob yield was higher with Win orange (98.71 q ha-1) variety as compared to Madhuri (89.05 q ha-1). The increase in fresh cob yield from 30 to 40 kg N ha-1 per dressing was 0.98 per cent and 20 to 40 kg N ha-1 was 10.20 per cent. Application of 40 and 30 kg N ha-1 per dressing by maintaining LCC threshold levels upto 5 resulted the 9.9 and 4.6 q higher cob yield ha-1 than the 100 per cent RDF for the Win orange and Madhuri varieties, respectively. The cob yield was greatly influenced by growth attributing characters such as LAI and DMP and yield attributing characters (cob length and girth, grain rows, number of kernels and grain weight per cob). Application of N @ 40 kg ha-1 recorded significantly higher N uptake (158.65 kg ha-1) over N@20 kg ha-1 (139.52 kg ha-1). Win orange (17.20) variety recorded higher total soluble solid compared to Madhuri (15.27). The carbohydrates (75.93) and protein (14.55) was high with 40 kg N ha-1 or 30 kg N ha-1 by LCC-5 than the LCC-3 and 4. Application of 40 kg N ha-1 dressing-1 at LCC-5 recorded higher gross returns (Rs. 90767 ha-1), net returns (Rs. 67352 ha-1) and B:C ratio (3.87) by the variety Win orange compared to Madhuri (Rs. 81538 ha-1), (Rs. 58902 ha-1) and (3.48) respectively.
Subject: Agronomy
Theme: Need-Based Nitrogen Management Using Leaf Color Chart in Sweet Corn Genotypes (Zea mays L. saccharata)
Research Problem: Need-Based Nitrogen Management Using Leaf Color Chart in Sweet Corn Genotypes (Zea mays L. saccharata)
Issue Date: 2011
Appears in Collections:Thesis

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