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Statistical evaluation and optimization of fertilizer requirement of upland rice (Oryza sativa) genotypes at varying levels of crop seasonal rainfall under moist subhumid alfisols.

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Title Statistical evaluation and optimization of fertilizer requirement of upland rice (Oryza sativa) genotypes at varying levels of crop seasonal rainfall under moist subhumid alfisols.
Statistical evaluation and optimization of fertilizer requirement of upland rice (Oryza sativa) genotypes at varying levels of crop seasonal rainfall under moist subhumid alfisols.
 
Creator ICAR_CRIDA
 
Subject varieties, varying, fertilizer ,levels.
 
Description Not Available
A study was conducted during rainy season (kharif 2003-05) at Phulbani using experimental data on the response of rice (Oryza sativa L.) varieties to varying fertilizer levels under moist sub-humid Alfisols. Statistical models were developed for yield prediction and fertilizer optimization at varying crop seasonal rainfall. Eight genotypes, viz 'Vandana', 'ZHU-11-26', 'RR-361-1', 'Jaldi-6', 'RR-166-645', 'RR-348-6', 'Heera' and 'Saria' genotypes were tested with an application of 60-30-30, 40-20-20, 20-10-10 kg N-P(2)O(5)-K(2)O/ha and a control. The genotypes attained a mean yield of 1651 kg/ha with 13% variation in 3 seasons. 'Vandana' was superior in control and 20-10-10 kg/ha, compared with the 'RR-348-6' in 40-20-20 kg/ha and 'RR-166-645' in 60-30-30 NPK kg/ha. Rank correlation between ranks assigned to mean and variation of genotypes shows that the performance of a genotype was significantly correlated with its variation with a maximum correlation of 0.79 in control and a minimum of 0.43 in 60-30-30 kg/ha. Regression models of yield through rainfall, applied fertilizer and their interaction indicated a significant predictability ranging from 0.92 for 'Vandana', 'ZHU-11-26' and 'Jaldi-6' to 0.97 for 'RR-361-1', 'RR-166-645' and 'Saria'. Rainfall had a significant positive influence on yield of all genotypes while quadratic variables of N, P and K had a significant negative influence on 'Vandana' and 'Saria'. Optimum NPK doses for attaining maximum yield were minimum for 'Saria' and maximum for 'ZHU-11-26'. For economic yield they were minimum for 'Saria' while N was maximum for 'Vandana' and K was maximum for 'ZHU-11-26'. P was maximum for 'RR-166-645' at 750 and 1000 mm and 'ZHU-11-26' at 1250 mm of rainfall. Optimum N ranged from 35 to 77 kg/ha while, P and K ranged from 16 to 67 kg/ha for maximum yield at a crop seasonal rainfall of 750 to 1250 mm. The optimum doses for economic yield ranged from 32 to 69 kg/ha for N, 15 to 56 kg/ha. for P and 16 to 62 kg/ha for K in the study.
Not Available
 
Date 2020-02-25T09:13:32Z
2020-02-25T09:13:32Z
2008
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/32913
 
Language English
 
Relation Not Available;
 
Publisher Maruthi Sankar, G.R