EFFECT OF INFLORESCENCE-TOP CUTTING ON THE YIELD AND YIELD ATTRIBUTES OF MUSTARD VARIETIES UNDER DIFFERENT SOWING TIMES

Abstract

An experiment was conducted at the Agronomy field of Sher-e-Bangla Agricultural University, Dhaka-1207 to evaluate the effect of inflorescence top cutting on the seed yield and yield attributes of mustard varieties under varying sowing and cutting times during November, 2011 to February, 2012. It was laid out in a split split plot design with three replications, three sowing times (01 November- S 1 , 15 November- S and 30 November-S 3 ), three varieties (V 1 -Tori-7, V 2 - BARI Sarisha-9 and V - BARI Sarisha-15) and three inflorescence top-cutting times (C 0 , C 1 and C 2 ) were tested. S 3 had significantly higher plant height. Significantly higher number of inflorescence were obtained in S 2

(6.67), S 2 C 1 (6.50), V 1 C 1 (5.17), V 1 C 2 (6.37) and S 1 V 1 C (7.80). Significantly higher number of siliqua was obtained in S 1 and S 2 of V 1 2 (140.47, 144.90) and V (137.17, 144.90). Significantly higher filled siliqua was obtained in S 2 V 2 C 2 (165.17). S in V 3 had significantly higher siliqua fresh weight with both C 1 and C (0.30 g, 0.31g to 0.30g, 0.29g). Significantly higher 1000-seed weight was also obtained with both the

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2 2 1 and S 1 2 C

2 cutting in V 1 (2.66 g, 2.69 g) and V 2 (2.69 g, 2.65 g); and also with V 3 C

(3.22 g), S 2 V 3 C 2 (3.01 g) and S 1 V 3 C 0 (3.76 g). S 2 , V 2 and C 0 2 had significantly higher seed yield (1566.50 kg ha -1 , 1448.20 kg ha -1 and 1538.55 kg ha -1 (2.64 g), S respectively). S had significantly higher sterile siliqua (17.26) and S 2 V 1 C showed significantly higher chaff dry weight (5.14 g).Inflorescence top cutting increased siliqua fresh weight positioned at the top of the inflorescence, number of filled siliqua and 1000-seed weight. S 1 in most of the cases maintained higher values of stem dry weight, above ground dry weight, inflorescence dry weight, flower fresh weight and 1000-seed weight. The highest HI was observed in S 2 V 1 C 0 (41.97%). 1 V 2 1 2 C V 1 V 1 C 1 2 C

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