Abstract

A field experiment with 5 sorghum cultivars viz., CSH-5, CSH-6. Cs-3541, SPV-297 and PJ-8(K) was conducted to study the phosphate use efficiency in sorghum. Per cent P derived from fertilizer was increased with increasing levels of P at all the stages of growth... Amongst the sorghum cultivars, hybrid CSH-5 extracted maximum P (41.69%) from applied source. The per cent P removal by plant was low at second sampling (At 60 day plant growth stage), The genotypic ability for utilization of applied fertilizer P differed greatly, Hybrid CSH-5 utilized the largest amount of applied P(7'39 per cent) while PJ-B(K) utilized the. lowest (3-10 per cent) during 60 days of plant growth Significantly high P uptake in all the sorghum cultivars was observed at 90 kg P0s/ha, Mean maximum P uptake (26.40 kg) P.0/ha) was recorded in hybrid CSH-5 and lowest (14.20 kg P₂Oc/ kg was observed in PJ-8 (K) Evon with applied fertilizer Phosphato, sorghum crop obsorbed nearly 92 per cent of its total P uptake from native soil P source.

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