EVALUATION OF SWEET CORN GENOTYPES FOR GREEN COB AND FODDER YIELD UNDER DIFFERENT LEVELS OF NUTRIENT AND PLANT SPACING
MAHESH KUMAR* AND JASBIR SINGH CHAWLA
Department of Plant Breeding and Genetics,
Punjab Agricultural University Ludhiana, Punjab
*(e-mail : firstname.lastname@example.org)
(Received : 1 May 2018; Accepted : 31 July 2018)
A field experiment was conducted at Punjab Agricultural University, Ludhiana during kharif season 2014. Three nutrient levels (125:60:30, 150:50:60, 250:80:100, kg N:P2O5:K2O/ha) as main plots, two plant spacing (60×20 and 60×15 cm) as sub plots and six genotypes (Bisco Madhu, Bajaura Sweet Corn, FSCH 18, KSCH-333, Madhuri and WOSC) in sub-sub plots were evaluated for their influence on fodder yield and green cob of sweet corn genotypes. The application of nutrients @ 250:80:100 kg N:P2O5:K2O/ha resulted in higher green cob yield (117.6q/ha) as compared to the nutrient @ 125:60:30 kg N:P2O5:K2O/ha (109.0 q/ha) and it was at par with the nutrients level @ 150:50:60 kg N:P2O5:K2O/ha (114.1 q/ha). However, application of 150:50:60 kg N:P2O5:K2O/ha recorded higher net return (31073 Rs./ha) and B:C ratio (1.69) than other two treatments. The green fodder yield (134.5 q/ha) was also significantly higher at higher levels of nutrients. Significantly higher green cob and green fodder yield were recorded under the plant spacing 60×15 cm (116.1 and 132.74 q/ha) than 60×20 cm (111.1 and 125.4 q/ha). Similarly net return and B:C ratio was also higher under closer spacing 60×15 cm. KSCH-333 recorded significantly higher green cob and green fodder yield (141.6 and 160.3 qt/ha) as compared to all other genotypes. Similarly net return and B:C ratio was also higher with KSCH-333 genotype than other genotypes and was followed by the genotype Bisco Madhu.