Response of promising rainy-season sorghum (Sorghum bicolor) genotypes to nitrogen and phosphorus fertilization
DOI:
https://doi.org/10.59797/ija.v50i3.5107Keywords:
Fertility levels, Growth, Sorghum genotype, Uptake, YieldAbstract
A field investigation was conducted at Pantnagar, Uttaranchal during the rainy (kharif) seasons of 1998 and 1999, to study the pattern of growth and nutrient uptake by sorghum [Sorghum bicolor (L.) Moench] genotypes to varying fertility levels. Genotype 'SPH 960' proved superior in producing higher number of green leaves/plant, leaf-area index and dry-matter accumulation than other genotypes. In 'SPH 960', increase in panicle, length, panicle diameter, panicle weight and graindpanicle resulted in significant increase of grain yield than rest of the genotypes. This genotype also removed more phosphorus and nitrogen from the soil. However, genotype 'SPH 792' recorded maximum stover yield, fresh fodder yield and potassium uptake. The net return and benefit : cost ratio were also highest in 'SPH 960'. Application of 80 kg N + 40 kg P,O,/ha not only increased the growth and yield attributes but also increased the grain yield, stover yield, harvest index, fresh fodder yield, uptake of N, P and K significantly which resulted in higher net return and benefit : cost ratio.References
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