COMPARING PAIRED ROW SYSTEM WITH CONVENTIONAL SYSTEM OF PLANTING IN WHITE MAIZE UNDER VARYING FERTILIZER APPLICATION

Abstract

An experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from January to May 2021 to comparing paired row system with conventional system of planting in white maize under varying fertilizer application. The experiment consisted of two factors. Factor A: Fertilizer doses namely, F 1 = 100% 0f recommended dose; F 2 = 50% of recommended dose; F 3 = 75% of recommended dose; F 4 = 125% of recommended dose; and factor B: sowing methods, namely S 1 = sowing in line using planting configuration 50cmx 25cm; S 2 = sowing in paired rows with 50 cm between two adjacent paired rows of planting configuration of 30cm x 25cm; S 3 = sowing in paired rows with 70 cm between two adjacent paired rows of planting configuration of 30cm x 25cm. From the trial, it was evident that the highest plant height (208.67cm), number of leaves (13.66), dry matter weight at 60 DAS and harvest , cob length (19.02 cm), cob circumference (18.53 cm), number of grains cob -1 (423), shell weight (16.83) and 100-grains weight (28.88 g), grain weight plant -1 (85.93g) were achieved by the treatment F 4 S 1 , while in case of sunshine below the canopy , F 4 S 2 had the highest sunshine and F 1 had lowest sunshine. The lowest plant height (185.43), no of leaves (10), dry matter weight at 80 DAS and at harvest, cob length (13.7 cm), cob circumference (12.1 cm), 100 grain weight (21.63g) were achieved by F 3 S 2 , however lowest shell weight (8.66 g), number of per cob (323.67) were obtained from F 2 S 2 S 1 . But in terms of grain yield (7.83 t ha ), stover yield (12.91 t ha -1 ) and biological yield (20.74 t ha -1 ), the highest result was obtained with F 4 S 2 where the lowest grain yield (5.67 t ha -1 ), stover yield (7.37 t ha ) and biological yield (13.04 t ha -1 ) were with F 3 S 1 . In case of harvest index highest result was (42.73%) for F 3 S 3 and the lowest result was (35.3%) for F 4 S 1 . The regression and correlation coefficients were found to be strongly positive among most of the plant parameters with leaf area and sunshine. The grain yield ha -1 of F 1 S 2 was statistically identical (7.68-7.83 t ha ).