P. Aravinthkumar1*, S. Srinivasan 2, A. Angayarkanni3 and M.V. Sriramachandrasekharan4

Department of Soil Science & Agricultural Chemistry Faculty of agriculture, Annamalai University, Annamalai Nagar-608002 (India) (e-mail: sribal20@yahoo.com)

ABSTRACT

A field experiment was conducted at Valiyampattu Village, Sankarapuram Taluk, Kallakurichi District, Tamilnadu during June- September, 2021 with an objective to enhance productivity of finger millet by different levels of inorganic fertilizers with different composts. The study comprised of twelve treatments, three replications and design of the experiment was RBD. The treatments were T1 - Absolute Control, T2 - 100% RDF (N:P2O5:K2O) (60:30:30 kg ha-1), T3 - 75% RN(C.F) + 25% RN(GLMC), T4 - 75% RN(C.F) + 25% RN (GOC), T5 - 75% RN(C.F) + 25% RN (PMC), T6 - 75% RN(C.F) +25% RN(CPC), T7 - 50 % RN(C.F) + 25% RN (GLMC) + 25% RN(GOC), T8 - 50 % RN(C.F) + 25% RN(PMC) + 25% RN(CPC), T9 - 50 % RN(C.F) + 25% RN(GLMC) + 25% RN(PMC), T10 - 50 % RN(C.F) + 25% RN(GLMC) + 25% CPC, T11 - 50% RN(C.F) + 25% RN(GOC) + 25% RN(PMC) and T12 - 50% RN(C.F) + 25% RN (GOC) + 25% RN(CPC). The recommended dose of fertilizers (N:P2O5:K2O) (60:30:30 kg ha-1) were applied to the field through Urea, SSP and MOP, respectively. Different composts viz., GLMC, GOC, PMC and CPC were imposed to the treatment as per N equivalent. The results of the study inferred that combined application of 50 % recommended nitrogen through chemical fertilizer + 25% RN through GLMC + 25% RN through GOC (T7) recorded significantly highest yield attributes viz., number of productive tillers hill-1, number of earhead plant-1, number of fingers earhead-1, fingers length (cm), 1000 grain weight (g) and grain yield and straw yield in ragi. IPNS practice of 50 % RN(C.F) + 25% RN (GLMC) + 25% RN(GOC) showed its best results with respect to grain yield 2975.6 kg ha-1 and straw yield of 7419.3 kg ha-1 as compared to other treatments.

Key words : Composts, NPK – fertilizers, ragi, yield attributes and yield

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