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标题：Growth attributes of rapeseed varieties (Brassica campestris l.) in relation to sowing dates and weedings treatments
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作者：Mst Towhida Akhter ; PB Kundu ; NK Paul 等
期刊名称：Journal of Bio-Science
印刷版ISSN：1023-8654
出版年度：2015
卷号：21
页码：51-59
语种：English
出版社：Institute of Biological Sciences, Rajshahi University
摘要：Context: To analyze the effect of sowing dates and weeding treatments on growth attributes such as total dry matter (TDM), leaf area index (LAI), net assimilation rate (NAR), crop growth rate (CGR), leaf area ratio (LAR) of three rapeseed (Brassica campestris L.) Objectives: The objective of the study was to identify the growth in relation to sowing dates and weed competition and identify the weeding number for better growth of rapeseed. Materials and Methods: This investigation was arranged as factorial experiment based on the split-split plot design with three replications. Four sowing dates were including 18 October (S 1 ), 12 November (S 2 ), 17 November (S 3 ) and 3 December (S 4 ) and three weeding treatments were no weeding (W 0 ), one hand weeding (W 1 ) and two hand weeding (W 2 ) and three varieties viz., BINA Sarisha-5, BINA Sarisha-6 and BARI Sarisha-14 were investigated. Results: The results showed that, TDM, LAI, CGR, NAR and LAR were affected by sowing date and weeding treatments. The highest TDM, LAI and CGR were obtained in the first sowing and two weedings treatment. The highest NAR was found in S 2 plants and W0 treatment. The highest LAR was found in S 2 plants and W 1 treatment. Conclusion: The results obtained in this study suggest that the first sowing and two weeding treatments are superior for the production of rapeseed. DOI: http://dx.doi.org/10.3329/jbs.v21i0.22519 J. bio-sci. 21: 51-59, 2013
关键词：Rapeseed;Sowing date;weeding;growth attributes