Study on phenology and yielding ability of Basmati fine rice genotypes as influenced by planting date in <i>aman</i> season

Abstract

The experiment was conducted at the Bangladesh Rice Research Institute Farm, Gazipur in Aman season to determine the optimum time of planting and to find out the genotypes having high yield potential. Fine rice genotypes Basmati PNR, Basmati 370, Basmati 375, and Basmati-D were transplanted from 22 July and continued upto 7 October at an interval of 15 days both in 1999 and 2000. Thirty-day old seedlings were transplanted at a spacing of 20 cm x 15 cm. The tallest plant was found in the early-planted crop at maturity. Crop planted from 7 August to 7 September gave more number of tillers per m2, panicles per m2 and grains per panicle which resulted in higher grain yield. Compared to the 22 August planting, grain yield decreased by 11, 10, 10, 26, and 61 percent, respectively, when the crop was planted on 22 July, 7 August, 7 September, 22 September, and 7 October. The growth duration of the genotypes decreased with the advancement of planting date. Among the genotypes, Basmati PNR gave maximum grain yield followed by Basmati-D due to more number of panicles and lower percentage of spikelet sterility. The lower grain yield was found in Basmati 370 irrespective of planting date due to lower number of panicles and high percentage of spikelet sterility. The Basmati PNR matured 5-12 days earlier than the rest of the test genotypes. Thus, fine rice Basmati PNR and Basmati-D were most suitable to obtain higher grain yield when planted within 17-21 August. Key Words: Basmati rice, time of planting, Aman season. DOI: 10.3329/bjar.v34i3.3962 Bangladesh J. Agril. Res. 34(3) : 373-384, September 2009

Performance of Elite Aromatic Rice Varieties Under Different Sowing Dates Under Egyptian Condition

“…Rice plants sown on the second or third dates significantly produced greater panicle number m -2 than those sown on early and late dates in the two seasons. These findings are consistent with those reported by Lee and Jun (1998), Ganajaxi et al (2001), Linscombe et al (2004), Singh et al (2004), Nahar et al (2009) and Mannan et al (2009).…”

“…Rice plants sown on the second or third dates produced greater tillers numbers m -2 than those sown on early and late dates in the two seasons. These finding are supported by the work done by Aslam (2000), Dixit et al (2004), Akram et al (2007), and Mannan et al (2009).…”

“…number of panicles m -2 and number of filled grain panicle -1 . Ganajaxi et al (2001), Ghosh et al (2004, Mannan et al (2009) and Shahidullah et al (2009) reported similar results for aromatic rice genotypic variations for grain yield.…”

Performance of System of Rice Intensification with Conventional Method of Rice Cultivation

“…Minimum 1000-grains weight was recorded for V 3 (19.83 g) in CM that was statistically similar with V 2 (20.67 g) and V 3 (19.69 g) in SRI (Table 1). Mannan et al (2009) also opined that heavier grain weight was found in early planted crop and grain weight decreased with the delayed transplanting.…”

Estimation of Key Dates and Stages in Rice Crops Using Dual-Polarization SAR Time Series and a Particle Filtering Approach

“…However, this study concludes with the need of a legislation control in the cycle of sowing to make it effective. On the other hand, dependence of yield with the sowing date is shown in [12] and [18], so the knowledge of sowing dates can be used to establish when is the optimum date to plant in certain area.…”