Abstract
A field experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during June 2013 to December 2013 to study the yield and grain dimensions of transplant aman rice varieties as influenced by date of transplanting. The experimental factors comprised of two factors namely, date of transplanting and variety. Date of transplanting comprised of 18 July, 19 August and 18 September. The variety comprised of Binadhan-7, BRRI dhan57, BR11 and Bashiraj. The experimental field was laid out in a split plot design. Most of the yield parameters were significantly affected by the date of transplanting. The yield and yield contributing characters were highest at 19 August transplanting and lowest at 18 September transplanting. Variety had significant effect on most of the yield and yield contributing characters. BR11 gave the highest grain yield (4.47 t ha-1) and the lowest value was obtained in BRRI dhan57. Among the grain dimensions, Binadhan-7 with 18 July transplanting gave the highest grain length (9.64 mm) whereas BR11 with 18 September transplanting gave the lowest value (7.82mm). Results showed that yield components were highest at 19 August transplanting and after that the reduction occurred at 18 September may be due to low temperature and short day length at flowering stage.Asian J. Med. Biol. Res. September 2016, 2(3): 442-450
Highlights
Bangladesh is an densely populated country and every year nearly 1.94 million people are added to its population of about 152 million (FAO, 2011)
Phenological events From table 1 it was found that duration of early tillering (ET), panicle initiation (PI), booting, heading, anthesis, physiological maturity (PM), grain filling duration and total field duration was gradually decreased with delayed transplanting up to September 18th
It was clear that early transplanting dates were less sensitive for day length and photoperiod phase but 18 September transplanted crops were suffered most by the low temperature and during the grain filling time. These data were in agreement with Ali et al, (2012) who found that duration of maximum tillering, panicle initiation, flowering stage were gradually decreased in T
Summary
Bangladesh is an densely populated country and every year nearly 1.94 million people are added to its population of about 152 million (FAO, 2011). Geographical and agronomic conditions of Bangladesh are favourable for rice cultivation. Rice is grown under diverse ecosystems such as irrigated, rainfed and deep water conditions in the three distinct rice growing seasons, namely Aus, Aman and Boro which account for approximately 9%, 42% and 49% of total annual rice production, respectively (BBS, 2011). Aman rice is one of the main crops in Bangladesh. It is the second largest crop in the country in respect of the volume of production. Selection of suitable variety with appropriate planting time may help our farmers to get higher yield. BRRI (1989) and Yoshida (1981) reported that rice plants require a particular temperature for its phenological affair such as panicle initiation; flowering, panicle exertions from flag leaf sheath to maturity and these are very much influenced by the planting dates during T. Deviation from the optimum planting time may cause incomplete or
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
