Effect of Lopping on Lodging, Productivity and Labor Utilization for Rice Cultivation at Transplanting Aman Season

Abstract

To study the effect of lopping on lodging, productivity and labor utilization for rice cultivation an experiment was conducted at BRRI Farm, Gazipur during Transplanting Aman in a randomized complete block design (Factorial) with three replications. The experimental treatments were: three lopping Viz. i) Control i.e., no lopping ii) lopping at 30 DAT and iii) lopping at 45 DAT; and two cultivars viz. i) BR 22 and ii) BRRI dhan32. Interaction effect of lopping and variety was not significant. The tallest plant (123 cm) was found in ‘no lopping’ treatment followed by lopping at 30 and 45 DAT. A similar trend was observed in lodging (%) and labor requirement for harvesting of rice. Lopping at 45 DAT produced the highest number of filled grain panicle-1 (117), grain yield (5.9tha-1) and straw yield (6.5tha-1) followed by lopping at 30 DAT and no lopping (control). However, there was no significant effect of lopping on labor requirements for threshing of rice. Therefore, effect of lopping on the yield and yield contributing characters of rice showed that lopping had positive effect on yield and decreasing lodging tendency of the studied variety. It was found that lopping at 45 DAT and 30 DAT could increase the rice yield. BR22 and BRRI dhan32 had statistically similar effect on lodging tendency.