<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Winter oilseed rape (<italic>Brassica napus</italic> L.) significance among field crops is unchangeable in Latvia in the last decade. Plant density of winter oilseed rape during growth period is influenced by plant development in autumn and plant wintering. The aim of four year (2008 – 2011) research in the LLU Research and Study farm “Vecauce” was to investigate the influence of agronomical factors (sowing date, sowing rate, fungicide (metkonazole)) application and meteorological factors on two type (line, hybrid) winter oilseed rape varieties plant density changes from sowing till harvesting. Plant density in autumn, spring and during harvesting was influenced also by meteorological parameters such as air temperature and precipitation. On four year average, field germination was observed from 66% to 95%. Sowing date significantly (p&lt;0.05) impacted plant survival during winters in all trial years for both varieties – ‘Californium’ and ‘Excalibur’, except for ‘Excalibur’ in the year 2008. Plant survival during winter for ‘Excalibur’ (hybrid) was higher compared to ‘Californium’ (line). Higher plant losses during winter were noted on the latest sowing date for both varieties. Winter oilseed rape plant survival was not significantly (p>0.05) influenced by fungicide as growth regulator application in autumn in any trial year. Influence of sowing date and sowing rate on the total plant density at harvest time was significant in all trial years (p&lt;0.05) for both varieties. At higher sowing rate the plant loss during growing period was higher than at lower rates.</p></abstract>

Winter oilseed rape (Brassica napus L.) significance among field crops is unchangeable in Latvia in the last decade. Plant density of winter oilseed rape during growth period is influenced by plant development in autumn and plant wintering. The aim of four year (2008 – 2011) research in the LLU Research and Study farm “Vecauce” was to investigate the influence of agronomical factors (sowing date, sowing rate, fungicide (metkonazole)) application and meteorological factors on two type (line, hybrid) winter oilseed rape varieties plant density changes from sowing till harvesting. Plant density in autumn, spring and during harvesting was influenced also by meteorological parameters such as air temperature and precipitation. On four year average, field germination was observed from 66% to 95%. Sowing date significantly (p<0.05) impacted plant survival during winters in all trial years for both varieties – ‘Californium’ and ‘Excalibur’, except for ‘Excalibur’ in the year 2008. Plant survival during winter for ‘Excalibur’ (hybrid) was higher compared to ‘Californium’ (line). Higher plant losses during winter were noted on the latest sowing date for both varieties. Winter oilseed rape plant survival was not significantly (p>0.05) influenced by fungicide as growth regulator application in autumn in any trial year. Influence of sowing date and sowing rate on the total plant density at harvest time was significant in all trial years (p<0.05) for both varieties. At higher sowing rate the plant loss during growing period was higher than at lower rates.

Changes of Winter Oilseed Rape Plant Survival During Vegetation

Rural Sustainability Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Changes of Winter Oilseed Rape Plant Survival During Vegetation"}

Winter oilseed rape (Brassica napus L.) significance among field crops is unchangeable in Latvia in the last decade. Plant density of winter oilseed rape during growth period is influenced by plant development in autumn and plant wintering. The aim of four year (2008 – 2011) research in the LLU Research and Study farm “Vecauce” was to investigate the influence of agronomical factors (sowing date, sowing rate, fungicide (metkonazole)) application and meteorological factors on two type (line, hybrid) winter oilseed rape varieties plant density changes from sowing till harvesting. Plant density in autumn, spring and during harvesting was influenced also by meteorological parameters such as air temperature and precipitation. On four year average, field germination was observed from 66% to 95%. Sowing date significantly (p0.05) influenced by fungicide as growth regulator application in autumn in any trial year. Influence of sowing date and sowing rate on the total plant density at harvest time was significant in all trial years (p<0.05) for both varieties. At higher sowing rate the plant loss during growing period was higher than at lower rates.

Winter oilseed rape (Brassica napus L.) significance among field crops is unchangeable in Latvia in the last decade. Plant density of winter oilseed rape...

Changes of Winter Oilseed Rape Plant Survival During Vegetation

Published Online: Aug 06, 2015

Page range: 35 - 45

DOI: https://doi.org/10.1515/plua-2015-0005

Keywords
wintering, sowing date and rate, fungicide as growth regulator, plant density

© Oskars Balodis et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Changes of Winter Oilseed Rape Plant Survival During Vegetation

Published Online: Aug 06, 2015

Page range: 35 - 45

DOI: https://doi.org/10.1515/plua-2015-0005

Keywordswintering, sowing date and rate, fungicide as growth regulator, plant density

© Oskars Balodis et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
wintering, sowing date and rate, fungicide as growth regulator, plant density