Yield performance of some transplant aman rice varieties as influenced by different levels of nitrogen

Abstract

The experiment was carried out during the period of June to November 2013 at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh with a view to examine the yield performance of some transplant aman rice varieties as influenced by different levels of nitrogen. The experiment consisted of four varieties viz. BRRI dhan49, BRRI dhan52, BRRI dhan56, BRRI dhan57 and four levels of N viz. 0, 46, 60 and 75 kg ha -1 . The experiment was laid out in a randomized complete block design with three replications. Variety, levels of N and their interactions exerted significant influence on yield contributing characters and yield of transplant aman rice. Among the varieties, BRRI dhan52 produced the tallest plant (117.20 cm), highest number of effective tillers hill -1 (11.28), grains panicle -1 (121.5) and 1000-grain weight (23.65 g) whereas the lowest values of these parameters were produced by BRRI dhan57. Highest grain yield (5.69 t ha -1 ) was obtained from BRRI dhan52 followed by BRRI dhan49 (5.15 t ha -1 ) and the lowest one (4.25 t ha -1 ) was obtained from BRRI dhan57. In case of N, the tallest plant (111.70 cm), highest number of total tillers hill -1 (12.34), grains panicle -1 (133.6), 1000-grain weight (24.55 g) and grain yield (5.64 t ha -1 ) were obtained from 75 kg N ha -1 and the lowest values were obtained from control. BRRI dhan52 fertilized with 75 kg N ha -1 showed best performance with respect to all the parameters studied. The overall results suggest that BRRI dhan52 should be fertilized with 75 kg N ha -1 for getting higher yield under the agro-climatic condition of BAU.

Influence of date of transplanting on the growth and yield performance of high yielding varieties of Boro rice

“…The highest number of total tillers hill -1 (13.39) was recorded in BRRI dhan69 followed by BRRI dhan74 while the lowest number of total tillers hill -1 (11.35) was recorded in BRRI dhan28. Similar results were reported by Jisan et al (2014) who reported that number of total tillers varied among the varieties. The production of total tillers hill -1 differed significantly at 1% level of significance due to different date of transplanting (Table 1).…”

“…The highest number of grains panicle -1 (130.90) was recorded in BRRI dhan69, which was statistically identical with BRRI dhan58 and the lowest number of grains panicle -1 (119.50) was recorded in BRRI dhan28, which was at par with BRRI dhan67. This trend could be explained by the varietal differences in genetic make-up (Shaha et al, 2014;Jisan et al, 2014;Sarkar et al, 2014). Date of transplanting showed significant variation in number of grains panicle -1 at 1% level of probability ( reported that early transplanting produced a greater number of grains/panicles than the late transplanting.…”

Effect of Number of Seedlings Hill-1 and Rate and Time of Nitrogen Application on the Yield of Late Transplant Aman Rice (cv. Br23)

“…On the other hand, reduction of aforesaid yield component due to application of less nitrogen (60 kg N ha -1 ) and control treatment were mainly responsible for the reduced grain yield in these treatments. The increase of grain yield of rice by nitrogen application is in agreement with the findings of many researchers (Sing and Sing, 1998;Islam et al, 2014;Jisan et al, 2014 andRay et al, 2015). The highest harvest index was obtained in control condition (0 kg N ha -1 ) which gradually decreased with the increase of N application and reached at the lowest one at 120 kg N ha -1 .…”

Influence of Plant Nutrient Management on the Yield Performance of Transplant Aman Rice (Oryza Sativa L.)

“…Nuruzzaman et al (2000) noticed that number of tillers hill -1 differed among the varieties. Varietal differences regarding grain yield was reported elsewhere (Tyeb et al 2013;Jisan et al, 2014;Pal et al, 2016). The highest harvest index (45.00%) was recorded in BRRI dhan70, which was at par with BRRI dhan71 and the lowest one in BRRI dhan72.…”