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EFFECT OF SITE SPECIFIC NITROGEN MANAGEMENT APPROACHES IN DIFFERENT RICE ESTABLISHMENT SYSTEMS
M. DINESH KUMAR
A.S. KUMARSWAMY
2016-08-19
Ph.D
Field experiment entitled “Effect of site specific nitrogen management approaches in different rice establishment systems” was laid out in spilt-plot design with three rice establishment systems as main plots [aerobic, system of rice intensification (SRI) and conventional] and four nitrogen management approaches as subplots (soil test crop response-STCR, soil test fertilizer recommendation-STL, leaf colour chart-LCC and recommended dose of fertilizer-RDF) in three replications conducted at College of Agriculture, Navile, Shivamogga, Karnataka during kharif 2014 and 2015 in a sandy loam soils of low N status. Among different systems of establishment, SRI recorded significantly higher growth and yield parameters viz., plant height, number of tillers plant-1, number of leaves plant-1, leaf area and total dry matter accumulation, number of filled grains panicle-1, panicle length, panicle weight and test weight. Thereby achieved significantly higher grain (7767 kg ha-1) and straw yield (8878 kg ha-1) compared to conventional (7220 and 8106 kg ha-1) and aerobic (4975 and 5948 kg ha-1) systems. Among different nitrogen management approaches, STCR approach with a target yield of 80 q ha-1 recorded significantly higher growth and yield components, chlorophyll content and nutrient uptake as compared to RDF, STL and LCC approaches. As a result significantly higher grain and straw yield (7182 and 8313 kg ha-1) were realized in STCR approach as compared to RDF (6196 and 6976 kg ha-1), STL (6392 and 7588 kg ha-1) and LCC approaches (6784 and 7697 kg ha-1). Treatment combination of SRI with STCR recorded higher grain and straw yield (8348 and 9479 kg ha-1) followed by conventional system with STCR approach (7921 and 8977 kg ha-1) and SRI with LCC approach (7914 and 8960 kg ha-1). Higher gross returns (Rs. 122201 ha-1), net returns (Rs. 86421 ha-1) and benefit cost ratio (2.42) was obtained under SRI with STCR approach.
Cultural practices followed for raising crop under different systems of establishment, Leaf area of rice as influenced by systems of establishment and nitrogen management approaches at different growth stages
English
304
University of Agricultural & Horticultural Sciences, Shivamogga
EFFECT OF SITE SPECIFIC NITROGEN MANAGEMENT APPROACHES IN DIFFERENT RICE ESTABLISHMENT SYSTEMS
Agronomy
EFFECT OF SITE SPECIFIC NITROGEN MANAGEMENT APPROACHES IN DIFFERENT RICE ESTABLISHMENT SYSTEMS
Thesis

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