INFLUENCE OF LEAF CLIPPING ON THE GROWTH AND YIELD OF AUS RICE

Abstract

An experiment was conducted during the period from March to August 2019 in the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh to find out the influence of leaf clipping on the growth and yield of aus rice. The experiment comprised two factors; Factors A: three different seedling clipping viz. S 0

= no seedling clipping (control), S 1 = 1/3 rd seedling clipping and S 2 = 1/2 seedling clipping and Factor B: four different leaf clipping before panicle initiation viz. L 0 = no leaf clipping (control), L 1 = Lower 1 + 2 leaves clipping, L 2 = Lower 2 + 3 leaves clipping and L 3 = Flag leaf clipping. The experiment was laid out in Randomized Complete Block design (RCBD) with three replications. Different seedling clipping showed significant variations of all parameter except plant height. Different leaf clipping treatment also showed same effect on different plant characters. Interacti on effect of seedling clipping and leaf clipping treatment also showed the significant variation on growth and yield parameters. The tallest plant (116.80 cm) was recorded from the combination of no seedling clipping with no leaf clipping. The highest effective tiller (27.69) and the longest panicle (35.81 cm) was obtained from the combination of 1/3 rd seedling clipping with no leaf clipping treatment. The highest noneffective tiller (15.36) was obtained from the combination of

no seedling clipping with flag leaf clipping. The maximum number of filled grain panicle −1 (157.50) was recorded from the interaction effect of 1/3 rd seedling clipping with no leaf clipping. The highest 1000-grain weight (26.87 g) was found from the interaction effect of 1/3 seedling clipping and no leaf clipping. The maximum grain yield (6.08 t ha −1 ) was recorded from 1/3 rd seedling clipping and no leaf clipping combination treatment. The maximum straw yield (6.24 t ha −1 ) was obtained from the combination of no seedling clipping and flag leaf clipping. The highest biological yield (10.23 t ha −1 ) was obtained from the combination of 1/3 rd seedling clipping with lower 1 + 2 leaves clipping. The highest harvest index (67.48 %) was observed from the interaction effect of 1/3 seedling clipping with no leaf clipping. 1/3 rd seedling clipping and No leaf clipping was given the best results on grain yield and harvest index. The lowest grain yield and highest straw yield was recorded the flag leaf clipping.