Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/93784
Authors: SANTHOSH KUMAR, G
Advisor: MAHENDER KUMAR, R
Title: PERFORMANCE OF DIFFERENT METHODS OF CROP ESTABLISHMENT IN RELATION TO NUTRIENT MANAGEMENT IN RICE-RICE SYSTEM
Publisher: PROFESSOR JAYASHANKAR TELANGANA STATE AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD
Language: en
Type: Thesis
Series/Report no.: D9991;
Agrotags: rice, nutrients, yields, grain, crops, nutrient management, diseases, developmental stages, sowing, planting
Abstract: A field experiment was conducted on a clay loam soil at Indian Institute of Rice Research (IIRR) formerly Directorate of Rice Research (DRR), Rajendranagar, Hyderabad, Telangana during the kharif and rabi seasons of 2011-12 and 2012-13 to study the “Performance of different methods of crop establishment in relation to nutrient management in Rice-Rice system”. The treatments consisted of four establishment methods (System of rice intensification (SRI), modified drumseeder, normal drumseeder and normal transplanting) as main plot treatments and four nutrient management practices (100 % RDN through inorganic, 75 % RDN through inorganic+ 25% RDN through organic, 50 % RDN through inorganic + 50% RDN through organic and 100 % RDN through organic) as sub plot treatments with 16 treatment combinations laid out in split plot design with three replications. Growth parameters viz., plant height, number of tillers m-2, leaf area index, dry matter accumulation, crop growth rate and relative growth rate were recorded at periodical intervals. Root studies viz., root dry weight was also measured at specified intervals. Days to 50% flowering and days to maturity was also recorded. Likewise, yield attributes viz., number of panicles m-2, number of filled grains and total number of grains panicle-1, sterility percentage, test weight, grain yield, straw yield and harvest index were recorded at harvest. Applied water, effective rainfall and water productivity were measured/determined. Nutrient (NPK) uptake by grain and straw were estimated at harvest and expressed as total NPK uptake. Cost of cultivation, gross returns, net returns and B:C ratio were worked out. The data generated on various aspects in this study on response of rice to different crop establishment methods and nutrient management practices were analyzed thorough standard statistical methods and logical conclusions were drawn. System of rice intensification recorded significantly superior in terms of growth parameters, root characteristics, yield attributes, grain and straw yield over other crop establishment methods viz., modified drum seeder, normal drumseeder and normal transplanting except test weight and harvest index. During all the four seasons lowest sterility percentage was observed in SRI as compared to all other planting methods. Data on phenology revealed that days to 50 % flowering and days to maturity were early by 7-8 days and 15- 20 days, in SRI and direct sowing respectively as compared to normal transplanting. Uptake of nitrogen, phosphorus and potassium by grain and straw at harvest were found to be significantly higher with SRI as compared to all other establishment methods. Among different nutrient management practices, application of 50 % RDN through inorganic + 50% RDN through organic source produced significantly higher growth parameters, yield attributes, grain and straw yield. No significant variation was observed with different nutrient management practices in case of harvest index and test weight. Application of 100 % RDN through inorganic source registered lesser number of days for 50 % flowering and maturity. The sterility percentage was higher with 100% RDN through organic source. Significantly higher uptake of N, P and K in both grain and straw were registered with 50 % RDN through inorganic + 50% RDN through organic source as compared to other nutrient management practices. Higher amount of water applied to normal transplanting over other planting methods. Water productivity recorded was significantly higher with system of rice intensification. Among all the nutrient management practices 50 % RDN through inorganic + 50% RDN through organic source witnessed highest water productivity. Gross, net returns and B:C ratio were higher with system of rice intensification over other establishment methods. Among all the nutrient management practices 100 % RDN through inorganic source recorded significantly higher net returns and B:C ratio over other treatments. The lowest net returns and B:C ratio was observed with100% RDN through organic source. .
Issue Date: 2016
Appears in Collections:Theses

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