RESPONSE OF BLACKGRAM TO FOLIAR APPLICATION OF UREA AND BORON

Abstract

The experiment was conducted at the Agronomy Research Field, Sher-e-Bangla Agricultural University, Dhaka, during the period from March 2016 to June 2016 to study the response of foliar spray of urea and boron on growth and yield of blackgram varieties. The experiment consists of two varieties viz. V 1 = BARI Mash-2 and V 2

= BARI Mash-3 and eight levels of fertilizer management viz. T 1 = Recommended fertilizer (RF), T 2 = RF + Foliar spray (FS) of water at flower initiation (FI), T 3 = RF + Urea (2%) FS at FI, T 4 ii = RF + Boron (1%) FS at FI, T 5 = RF + Urea (2%) + Boron (1%) FS at FI, T 6 = Urea (2%) FS at FI, T 7 = Boron (1%) FS at FI and T 8 = Urea (2%) + Boron (1%) FS at FI. The experiment was laid out in Split-Plot Design with three replications. Results indicated that the variety, BARI Mash-2 gave the tallest plant (49.47 cm), branches plant -1 (4.45), above ground dry matter content plant- 1 (20.875 g) and nodules plant -1 (96.13), number of pods plant -1 (21.70), pod length (4.19 cm), number of seeds pod -1 (10.04), 1000 seed weight (34.96 g), seed yield (1.06t ha -1 ), stover yield (1.38t ha -1 ) and biological yield(2.45t ha -1 ) on the other hand the highest number of leaves plant (29.47), seeds pod -1 (5.77) and harvest index (44.77%) was produced by BARI Mash-3. In case of fertilizer management, the tallest plant (58.42 cm), pods plant (28.85), pod length (4.535cm), seeds pod -1 (6.190), 1000 seed weight (38.50g g), seed yield (1.24 t ha -1 ), stover yield (1.55 t ha -1 ), biological yield(2.79t ha -1 -1 -1 ) were recorded from T 5 (RF + Urea 2% + Boron 1% FS at FI), whereas the highest number of branches plant

(4.35), above ground dry weight plant -1 (24.67 g) and nodule plant (161.8) were recorded from T 7 (Boron 1%) FS at FI) and the highest harvest index (44.80 %) were recorded from T 6 (Urea 2% FS at FI). Regarding combined effect, the tallest plant (54.27cm), highest above ground dry weight plant -1 (28.33 g) number of nodules plant -1 (170.7), pods plant -1 (31.70), pod length (4.58cm), 1000-seeds wt. (39.67 g), seed yield (1.29 t ha -1 ), stover yield (1.64 t ha -1 -1 ) and biological yield (2.93 t ha ) was found from V 1 T 5. Maximum

leaves plant -1 (37.40), branches plant (4.87) was recorded from V 2 T 5 and harvest index (46.83%) recorded from V 2 . So, variety BARI Mash-2 with T 5 (RF + Urea 2% + Boron 1% FS at FI) is suggested for better result in blackgram cultivation.