Effect of Variety and Seedling Number on the Growth and Yield of Boro Rice in Bangladesh

Abstract

Rice is the most important human food crop in the world. In Bangladesh rice is cultivated throughout the year as Aus, Aman and Boro. Among them boro rice is generally cultivated in November to March. More than half of the total production (55.5%) is obtained in this season. Generally, farmers use more than the recommended number of seedlings during transplanting. The number of seedlings plays a vital role in the growth, development and yield of rice. The aim of this experiment was to determine the number of seedling(s) during transplanting for boro rice varieties for higher growth and yield. This investigation was carried out at the research field of BINA sub-station under Khagrachari sadar upazila in Bangladesh during December 2017 to May 2018. The experiment tested three seedling numbers; S1 (Single), S2 (double), S3 (triple) and four varieties V1 (BRRI dhan-28), V2 (Binadhan-14), V3 (Heera-1), V4 (Shakti-2) in a factorial RCB design with three replications. Results revealed that significantly highest plant height was obtained with treatment S1´V3 (110.30 cm) and S3´V4 (109.4 cm) while the maximum number of tillers/hill from S3´V1 (16.93) and S2´V1 (16.07). In terms of production, treatment combination S3´V4 gave the highest grain (10.40 t/ha), straw (10.40 t/ha) and biological yield (10.40 t/ha). Harvest index was the highest in treatment S1´V4 (59.48). From the above findings it was observed that single seedling performed better than two and three seedlings per hill in terms of getting optimum yield of boro rice varieties. Hence, the rice growing farmers should avoid the use of extra seedlings during transplanting to save labor, time and money.

Yield and Profitability Analysis of Pulse and Oil Seed Based Cropping Patterns against Aman- Boro- Fallow Cropping Systems in Magura

“…First crop of CP 2 (Fig 2), Binadhan-16 attained a grain and straw yield of 4.61 t/ha and 5.24 t/ha. These results are alike with the findings of Chowhan et al (2019). Binasarisha-10, the second crop of this pattern gave less production than CP 3 .…”

“…It matured at 95 DAT. Chowhan et al (2019) found duration of Binadhan-14; 126.11 days with varietal effect.…”

“…Heera was harvested at 100 DAT. Chowhan et al (2019) stated that Heera-1 had a mean duration of 147.78 days with varietal effect. W hich closely supported the present findings.…”

“…For rice, land preparation, planting method, time, seedling age, weeding, pest control, rouging etc. were done according to the methodology followed by Chowhan et al (2017) and Chowhan et al (2019). In case of mustard, seeds were broadcasted at the rate of 3.0 Kg/ha.…”

“…Rice is the staple food of Bangladesh and it is extensively produced over 70% of its total agricultural lands (Chowhan et al, 2019). Intensive rice-rice cropping systems results in lessening of soil pH and thereby creating soil acidity problem which ultimately results in unavailability of nutrients, depletion of soil and lowering crop yields.…”