INFLUENCE OF AGRONOMIC MANAGEMENTS ON GROWTH AND YIELD OF QUINOA (Chenopodium quinoa Willd.)

Abstract

A field experiment was carried out at Agronomy Research Field, Sher-e-Bangla Agricultural University, Dhaka-1207 during the period from December 2020 to March 2021 to study the impact of different agronomic management practices on growth and yield of quinoa. The experiment comprised of seven agronomic management practices (no management, no fertilizer, no weeding, no irrigation, no thinning, no pesticides and complete management) in the plots. The experiment was laid out in RCBD design with three replications. Significant variation was recorded for fertilizer, weeding, irrigation, thinning and pest management on growth and different yield contributing characters and yield of quinoa. The maximum plant height (54.02 cm), number of leaves plant (17.53), number of branches plant -1 (19.60), fresh weight plant II

-1 (7.08 g), dry weight plant (1.39 g), SPAD value (70.24), 1000-grain weight (3.90 g), grain yield (1.55 t ha ), straw yield (1.47 t ha -1 ) and biological yield (3.00 t ha -1 ) were recorded from T (complete management) and also maximum root length (7.44 cm) and shoot length (48.27 cm) were recorded from T 2 (no weeding) and highest harvest index (53.19%) were from T (no fertilizer) respectively. While the minimum plant height (21.24 cm), number of leaves plant -1 (9.27), number of branches plant -1 (10.53), fresh weight plant -1 (1.77 g), dry weight plant -1 (0.14 g), root length (4.39 cm), shoot length (18.83 cm), number of inflorescence (11.87), SPAD value (45.73), 1000-grain weight (3.17 g), grain yield (0.24 t ha ), straw yield (0.23 t ha -1 ), biological yield (0.48 t ha -1 ), harvest index (51.06%), were recorded from T (no management). No management reduced (84.52%) yield of quinoa that followed by no irrigation (81.29%), no fertilizer (32.90%), no thinning (13.35%), no weeding (6.45%), and no pesticide (5.41%) application compared to complete management.