PERFORMANCE OF SINGLE CUT FORAGE SORGHUM GENOTYPES TO DIFFERENT FERTILITY LEVELS
D.S. RANA, BHAGAT SINGH, K. GUPTA AND A. K. DHAKA*1
Forage Section, Department of Genetics and Plant Breeding,
CCS HAU, Hisar-125 004 (Haryana), India
(Received: 1 October 2013; Accepted: 25 October 2013)
A field experiment was conducted at main Forage Research Area, CCS HAU, Hisar with five single cut sorghum genotypes (SPV 1846, SPV 1847, PC 1003, CSV 21F and HC 308) were grown with four fertility levels viz. control, 50% recommended dose of fertilizer (RDF), 100% RDF (80 kg N+30 kg P2O5/ha) and 150% RDF. The plant height, number of tillers per meter row length, green fodder and dry matter yield of sorghum genotypes were significantly influenced by different fertility level. The highest green fodder yield (523.6 q/ha) and dry matter yield (140.4 q/ha) were recorded in genotype CSV 21F followed by genotype PC 1003. The maximum plant height, number of tillers, green fodder and dry matter yield were recorded at 150 percent of recommended dose of fertilizer (RDF), which was significantly higher than lower doses of fertilizer. An increase of 55.35, 22.36 and 11.82 percent in green fodder yield and 90.42, 36.04 and 17.78 percent in dry matter yield was recorded with the application of 150% RDF over control, 50% RDF and 100% RDF, respectively. The highest crude protein yield and digestible dry matter (DDM) were also recorded with 150% RDF which was significantly higher than lower fertility levels.
Key words: single cut forage sorghum,fodder, yield, crude protein, digestible dry matter