INFLUENCE OF INTEGRATED NUTRIENT MANAGEMENT AND PLANTING CONFIGURATION ON THE PRODUCTIVITY OF SESAME (Sesamum indicum L.)

Abstract

The study was carried out to evaluate some sesame varieties under different nutrient management strategies for enhancing the productivity of sesame during 2014-16. The experiments were conducted in three years. First year experiment was carried out with two factors viz., different nutrient levels with different varieties of sesame in split plot design with three replications during March-June 2014. The main plot treatments had four nutrient levels viz., 75% of recommended dose of fertilizer(RDF) (N1), 100% RDF (N2), 125% of RDF (N3) and 150% of RDF (N4) and the subplot treatments included six sesame varieties viz., Lal til (Local) (V1), Atshira (Local) (V2), T6 (V3), BARI til-3 (V4), BARI til-4 (V5) and Bina til 2 (V6). RDF indicates a nutrient schedule of 56:72:23 kg N, P2O5 and K2O ha-1. Results revealed that nutrient levels, 150% of RDF

produced the highest growth parameters, but 100% of RDF (N2) produced the highest seed yield (1223 kg ha-1). The least seed yield was observed with N4 (924 kg ha-1). Among the sesame varieties placed in different sub plots, BARI til-4 showed the best growth and yield contributing parameters giving the highest seed yield (1170 kg ha-1). The least seed yield was registered with V1 (811.30 kg ha-1). Interaction effect was found significant showing a seed yield of 1481 kg ha-1 with N2V5. From this trial, the best nutrient level (100% of RDF i.e., 56:72:23 kg N, P2O5 and K2O ha-1) and variety BARI til-4 selected and taken over to the next year of study. In the second year experiment, different sources of organic manures were integrated with chemical fertilizers at three different proportions viz., 25, 50 and 75 percent along with 100 percent organic source and chemical fertilizers alone. The organic sources included vermicompost and FYM. Different plant spacing were associated with different sources of plant nutrients. Nine nutrient sources and four plant spacings were used in this experiment. The experiment was conducted during March-June 2015 in split plot design with three replications consisting of 36 treatment combination. With regard to different sources of nutrients, T5 (25% RDF through vermicompost + 75% as chemical fertilizer) produced the highest seed yield (1326 kg ha-1), oil yield (581.07 kg ha-1) and protein yield

(256.09 kg ha-1) where least seed yield (1204 kg ha-1), oil yield (518.57 kg ha-1) and protein yield (226.55 kg ha-1) was produced by T6 (100% RDF through FYM). Among the different plant spacing studied, S3 (30 cm × 15 cm) produced highest yield attributes but highest seed yield (1413 kg ha-1), oil yield (584.11 kg ha-1) and protein yield (250.82 kg ha-1) was obtained from S1 (30 cm × 5 cm) where the least seed yield (1102 kg ha -1 ), oil yield (484.19 kg ha -1 ) and protein yield (216.09 kg ha -1 ) was obtained from S (30 cm × 20 cm). Interaction effect of nutrient sources and plant spacing in second year experiment, the highest seed yield, oil yield and protein yield (1437, 608.14 and 269.58 kg ha -1 4 , respectively) were produced with T 5 S where lowest seed yield (933.30 kg ha -1 ), oil yield (412.05 kg ha -1 ) and protein yield (186.29 kg ha 1 -1 ) were obtained from T . The third year experiment was the repeated experiment of second year and similar trend was found in maximum cases. The highest seed yield, oil yield and protein yield (1442, 609.39 and 271.38 kg ha 1 , respectively) were obtained from the treatment combination of T 5 S where the lowest (962, 424.43 and 186.29 kg ha -1 1 , respectively) were also obtained from the treatment combination of T 6 S 4 . 6 S 4 -