Yield and yield attributes of rapeseed – mustard (Brassica) genotypes grown under late sown condition

Abstract

A field experiment was conducted at the Central Research Station of BARI, Gazipur for two consecutive years 2010-11 and 2011-12 with 30 varieties/ genotypes of rapeseed-mustard under three dates of sowing viz., 25 November, 5 December, and 15 December to determine changes in crop phenology, growth and yield of mustard genotypes under late sown condition when the crop faced high temperature. Days to flowering and maturity were different at different planting times. Date of sowing significantly influenced plant height, siliquae/plant, seeds/siliqua, seed yield, and oil content of seed in both the years. The highest seed yield (1310 and 1535 kg/ha) was obtained from the first planting (25 November) in both the years, which was significantly different from two other dates of sowing. Yield and yield attributes of different varieties varied significantly. Among the varieties, BARI Sarisha-16 of Brassica juncea gave significantly the highest seed yield (1495 and 1415 kg/ha), which was statistically identical to BJDH-11, BJDH-12, BJDH-05, BJDH-20, and BARI Sarisha-6 and significantly different from all other varieties. Interaction effect of variety and sowing date significantly influenced plant height, number of siliquae per plant, number of seeds per siliqua, seed yield, and strover yield. The highest seed yield (1758 and 1825 kg/ha) were recorded from BJDH-11 and BARI Sarisha-16 of Brassica juncea at 25 November planting and BJDH-11 produced the highest yield at 15 December in both the years. The maximum strover yield (3758 and 3825 kg/ha) were obtained from BJDH-11 and BARI Sarisha-16 of Brassica juncea at 25 November planting during 2010-11 and 2011-12. The highest oil content of seeds (44.4 % and 45.9%) were obtained from the seed of BARI Sarisha-6 and BARI Sarisha-14 at 25 November planting in both the years.

Effect of sowing dates on different rapeseed varieties under rain fed condition

“…Among the dates, the higher aborted siliqua was observed in delayed sowing than earlier two dates. The first date of sowing had 2.850 aborted siliqua which is at par with second date of sowing with 3.950 aborted siliqua whereas the delayed date had 8.125, which is also in agreement with the study of Alam et al, (2014). The higher abortion of siliqua in delayed date might be due to severe fall in temperature and depleted soil residual moisture which hampered the fertilization process and nutritional translocation.…”

Performance of Rapeseed and Mustard(Brassica sp.)Varieties/Lines in North-East Region (Sylhet) of Bangladesh

“…The maximum number of siliqua/plant was produced by the variety Improved Tori (120.27) and it was statistically similar with BARI sarisha-8, BARI sarisha-9, BARI sarisha-14 and BARI sarisha-15. Similar results were observed by Mondal et al [15] and Alam [12]. They were found maximum number of siliqua/plant (136) in the variety J-5004 which was identical with the variety Improved tori.…”

“…It was supported by BARI, 2010 and produced 105.8 cm and 113.6 cm tallest plant in BARI Sarisha-8 and BARI Sarisha-15 respectively. Whereas, BARI Sharisa-14 produced the shortest plant (83.6 cm) which was supported by Ali et al [10], Bhuiyan [11] and Alam [12], Sana et al [13] reported that, the final plant height reflected the growth behavior of a crop.…”

Impact of Different Doses of Fertiliser and Crop Geometry on Growth, Seed and Oil Quality, Consumptive Water Use, Water Use Efficiency and Soil Moisture Extraction in Late Sown Indian Mustard (Brassica juncea L.) Crop

“…Late sown Indian mustard is exposed to high temperature coupled with high evaporative demand of the atmosphere during the reproductive phase (ripening and grain filling) which consequently results in forced maturity and ultimately low productivity. High temperature in Brassica caused flower abortion with appreciable loss in seed yield [6]. Temperature can't be manipulated easily under field conditions but by modifying fertilizer doses and crop geometry of late sown Indian mustard, soil moisture loss may be adjusted to meet out the evaporative demand of the atmosphere during reproductive phase.…”