Effect of Different Doses of Urea on the Yield of Boro Rice Varieties in Haor Areas of Bangladesh

Abstract

The experiment was carried out at Sunamganj district during November 2016 to May 2017 to observed the effect of urea fertilizer on the yield of boro rice varieties in haor areas of Bangladesh. Two factors experiment viz. Varieties BRRI dhan29 and BRRI dhan58; and six urea fertilizer levels including: 340 (F1), 320 (F2), 300 (F3), 280 (F4), 260 (F5), and 165 kg ha-1 (F6) [Farmer’s practice (FP)] were used. In case of F1-F5, the MoP-TSP-CaS04-ZnS04 as 127-112-75-11 kg ha-1 were used while Farmers’ practice (FP) was done with only 82 kg ha-1 TSP. The experiment was laid out in two factors randomized complete block design (RCBD) with three farmers’ replications. Data were collected on growth, yield and yield contributing characters of boro rice. Plant height varied at harvest stage in relation to variety and fertilizer. The tillers production hill-1 varied at harvest in case of variety and urea application. Higher plant height was found in BRRI dhan58 (93.9 cm) in comparison to BRRI dhan29 (90.3 cm). Plant height was also influenced due to urea fertilizers application. The higher tillers hill-1 (15.9), effective tillers hill-1 (12.3) and longer panicle length (21.1 cm) were produced by BRRI dhan58 at harvest compared to BRRI dhan29. The longest panicle (21.4 cm) was produced in the treatment F3 (300 kg urea ha-1). Higher number of sterile spikelets panicle-1 (58.5) and 1000-grain weight (23.2 g) was produced by BRRI dhan58. Higher number of grains panicle-1 (137.5) was produced by BRRI dhan29. The highest grain yield (6.7 t ha-1) and straw yield (7.91 t ha-1) were obtained in the treatment F3 (300 kg urea ha-1). The experimental soil analyses showed that the nutrient contents in post-harvest soils were higher compared to initial soil due to balanced fertilizer application. It is concluded that 300 kg urea ha-1 promoted highest grain yield.

Effect of Nitrogen Doses in Boro Rice Grown with Variable Levels of Floating Duckweed

“…The lower number of tillers hill -1 (7.39, 10.66 and 11.85 at 30, 60 DAT and at harvest, respectively) was found from the treatment N 3 which was statistically identical with N 1 . More or less similar result was also observed by Karim (2019), Adhikari (2018) and Chamely and Islam (2015) also found that N had significant effect on number of tillers hill -1 . The maximum number of tillers hill -1 (11.43, 16.17 and 16.40 at 30, 60 DAT and at harvest, respectively) was found from the treatment combination of D 2 N 2 which was statistically similar with the treatment combination of D 1 N 1 , D 1 N 2 , D 2 N 1 and D 3 N 2 .…”

“…The highest number of noneffective tillers hill -1 (3.45) was found from the treatment N 3 while lower number of non-effective tillers hill -1 (2.26) was found from the treatment N 2 followed by N 1 . The result obtained from the present study was followed with the findings of Karim (2019) and Adhikari (2018). In treatment combinations, lower number of non-effective tillers hill -1 (1.40) was found from D 2 N 2 which was statistically similar with D 1 N 2 and D 2 N 1 .…”

Adjusting planting time of Binadhan-17 in boro season

“…Patel et al (2019) concluded that, aged seedlings produce fewer tillers due to the reduction of vegetative period and thereby result in poor yield. Karim et al (2019) alluded that, mean effective tiller/hill of BRRI dhan58 was 12.30 with varietal effect. The present result is different from the earlier findings may be due to less variation in weather during the sowing intervals and it also may have happened due to soil fertility factor(s).…”

Effect of different nitrogen levels on yield and yield attributes of different rice varieties in DDSR condition at Kanchanpur, Nepal

“…It is well known that nitrogen fertilizers significantly increase rice yields, especially since the development of current varieties. A significant component of protoplasm, protein, and chlorophyll is the nutrient nitrogen (Karim et al, 2019). The application of nitrogen fertilizer in an inefficient manner raises production costs and degrades product quality (Mahato et al, 2019).…”