Changes of winter oilseed rape plant survival during vegetation

Balodis, O., Latvia Univ. of Agriculture, Jelgava; Gaile, Z., Latvia Univ. of Agriculture, Jelgava

Changes of winter oilseed rape plant survival during vegetation

2015

Balodis, O., Latvia Univ. of Agriculture, Jelgava (Latvia) | Gaile, Z., Latvia Univ. of Agriculture, Jelgava (Latvia)

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 is less than 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 is greater than 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 is less than 0.05) for both varieties. At higher sowing rate the plant loss during growing period was higher than at lower rates.

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Mots clés AGROVOC

brassica napus cultivos de invierno culture d'hiver date de semis dosis de siembra fecha de siembra field experimentation fongicide fungicidas fungicides germination latvia letonia lettonie meteorological factors plant growth substances plant population recherche research resistencia invernal sowing date sowing rates supervivencia survie survival sustancias de crecimiento vegetal vegetation winter crops winter hardiness

Informations bibliographiques

Publié dans

Proceedings of the Latvia University of Agriculture

Volume 33 Numéro 1 ISSN 2255-8535

Pagination

1 Web Site, pp. 35-45

D'autres materias

Investigacion; Densite de semis; Substance de croissance vegetale; Germinacion; Conditions meteorologiques; Condiciones atmosfericas; Poblacion vegetal; Experimentacion en campo; Vegetacion; Experimentation au champ; Resistance a l'hiver; Population vegetale

Langue

anglais

Type

Summary; Web Site; As

Sur AGRIS depuis: 2016-10-15

Format: AGRIS AP

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Cette notice bibliographique a été fournie par Fundamental Library of Latvia University of Life Sciences and Technologies

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