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A technique for selecting potato (Solanum tuberosum) genotypes with low nitrogen requirement

Indian Agricultural Research Journals

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Title A technique for selecting potato (Solanum tuberosum) genotypes with low nitrogen requirement
 
Creator GOVINDAKRISHNAN, P M
SHARMA, R C
KHAN, I A
SHARMA, H C
 
Subject quadratic model, N doses, genotypes, yield target, ecofriendly indices
 
Description The technique consists of fitting the quadratic model to find relationship between yield of a genotype and N rates,followed by determination ofN dose for getting maximum yields of each genotype including the standard cultivar. Themaximum yield of standard cultivar is termed as fixed yield target. The dose of N for achieving the fixed yield target bya genotype is determined and genotypes requiring less N than standard cultivar are designated as low-nitrogen requiringgenotypes. Methods were also developed to determine the relative and absolute ecofriendly indices of N of the genotypescompared to standard cultivars. Based on the technique, 'P1 376' ('Kufri Ashoka') was identified as low-N requiringearly duration potato (Solanum tuberosum L.) genotype from the tuber yield data of the field experiments conducted atModipuram from 1991-92 to 1993-94. It required 65 kg N/ha compared to 194 kg N/ha for 'Kufri Chandramukhi'(standard cultivar) for attaining a fixed tuber yield target of 33.4 tonnes/ha. In the medium duration 'MS 78-46'tequired 133 kg N/ha compared to 211 kg N/ha by 'Kufri Bahar' (standard cultivar) for attaining yield target of 41.7tonnes/ha. The 'MS 78-46' and 'Kufri Ashoka' were more ecofriendly as their relative and absolute ecofriendly indiceswere higher than the standard cultivars. 'Kufri Ashoka' was more efficient in utillizing N from soil while 'MS 78-46'was more efficient in utillizing N from soil as well as fertilizer source than the standard cultivars.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2013-01-24
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/26734
 
Source The Indian Journal of Agricultural Sciences; Vol 69, No 5 (1999)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/26734/12187
 
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