Effect of planting density on yield and yield attributes of local aromatic rice varieties

Abstract

An experiment was conducted at the Agronomy Field of Patuakhali Science and Technology University, Dumki, Patuakhali from June to December, 2013 to find out the effect of variety and planting density on the yield and yield attributing characters of local aromatic rice. The experiment was laid out in a factorial randomized complete block design with three replications, which consisted of three local aromatic rice varieties (Chinigura, Shakhorkhora and Kalizira) and four planting densities were viz. S1 (25 cm × 20 cm), S2 (20 cm × 20 cm), S3 (20 cm × 15 cm) and S4 (20 cm × 10 cm). The results revealed that the local aromatic rice var. Shakhorkhora variety produced the highest number of grains per panicle (131) and 1000-grain weight (13.8 g), consequently higher grain (2.63 t ha-1), followed by Kalizira (2.56 t ha-1) and straw yield (4.21 t ha-1). One the other hand, higher number of tillers per hill (14.8), number of grains per panicle (140 nos.) were found in 20 cm × 20 cm spacing with higher grain yield.Bangladesh J. Agril. Res. 43(3): 489-497, September 2018

Influence of Spacing of Planting on the Yield Performance of Some Aromatic Rice Varieties in Boro Season

“…Grain and straw yields differences might be due to genetic make-up of the varieties. Grain yield differed due to varietal differences was reported elsewhere (Halder et al, 2018;Jisan et al, 2014;Adhikari et al, 2018). The highest (8.56 t ha -1 ) and lowest biological (8.26 t ha -1 ) yield were recorded in Basmati and BRRI dhan63, respectively while the highest harvest index (47.38%) was obtained in BRRI dhan50 and the lowest one from Basmati (Table 1).…”

“…The closest spacing 20 cm × 10 cm showed the best yield (Figure 2) than other five plant densities due to highest plant population per unit area. It might be due to the fact that the closer row spacing provided highest grain yield and straw yield which resulted in the highest biological yield (Paul et al, 2017;Halder et al, 2018). In a column, figures with same letter (s) or without letter do not differ significantly whereas figures with dissimilar letter differ significantly (as per DMRT)…”

“…Plant spacing is one of the crop management activities which govern all of the components of plant need for their growth and yield. Plant spacing directly affects normal physiological activities through intra-species competition (Halder et al, 2018). Different crops and even different cultivars of a crop respond physiologically differently to plant spacing due to their differential requirement of natural resources (light, water, oxygen, carbon dioxide, nutrients) (Oad et al, 2001).…”

Effect of planting density on growth characteristics and grain yield increase in successive cultivations of two rice cultivars

“…They observed the highest number of tillers m −2 with increased row spacing. The results of another study showed that plant height, panicle length, and number of tillers per hill were significantly affected by different PDs (20 × 25, 20 × 20, 20 × 15, and 20 × 10 cm 2 ); the highest amounts of these traits were observed at greater planting distances, and the lowest amount was observed at lesser planting distances (Halder et al., 2018). These results seem to be due to the better access plants had to solar light and soil nutrients at optimal planting distances, which thus facilitates proper growth (Bhowmik et al., 2012).…”

“…Halder et al. (2018) reported that different cultivars differ in terms of plant height, panicle length, and number of tillers per hill. The researchers found that the highest amount of these traits belonged to the ‘Shakhorkhora’ and ‘Kalizira’ cultivars and the lowest amount belonged to the Chinigura cultivar.…”