Author(s):

Sudip Sarkar, N Surbala Devi, Abhinandan Singh and I Yimjenjang Longkumer

Abstract: This experiment was conducted in order to evaluate effect of Single Super Phosphate (SSP) and Rock Phosphate (RP) on growth parameters of paddy (CAU-R1) in department of Soil Science and Agricultural Chemistry of College of Agriculture, Central Agricultural University, Imphal (Manipur) during kharif season of 2016. Results on pot experiment revealed that, comparing with the untreated control all phosphorus treated soil gave significantly (p=0.05) higher plant height, number of tillers and dry matter yield of paddy at different stages of crop growth. Plant height was significantly higher in T₅ (50% RD of P₂O₅ from SSP + 50% RD of P₂O₅ from RP, RD- Recommended Dose) which is at par with T₆ (25% RD of P₂O₅ from SSP + 75% RD of P₂O₅ from RP). Among the different treatments, comparatively more number of tillers was sawn in T₆ which is at par with T₃ (100% RD of P₂O₅ from RP). Dry matter accumulation was higher in paddy grown in T₆ added soil on 100^th day and T₅ at harvest which are at par with T₅ and T₆, respectively. Significantly higher grain yield (g hill^-1) was observed in paddy grown in T₅ followed by T₆ and T₂ (100% RD of P₂O₅ from SSP).

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