Winter oilseed rape (Brassica napus L.) autumn growth

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

Winter oilseed rape (Brassica napus L.) autumn growth

2011

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

Lack of data about effect of meteorological conditions, sowing date, sowing rate, fungicide as growth regulator application and other agroecological factors on rape autumn growth is observed in Latvia. The aim of our research, started in autumn 2007 and continued up to autumn 2010 in Research and Study farm ''Vecauce'', was to investigate the influence of agroecological factors (sowing date, sowing rate and fungicide (as growth regulator in autumn)) application as well as meteorological conditions on autumn plant growth of two types of winter rape varieties. Winter rape biometrical parameters were estimated, and meteorological parameters (hydrothermal coefficient (HTC) and growing degree days (GDD)) were calculated. Four year results showed that winter oilseed rape seed germination was affected by precipitation and air temperature around the sowing time. Calculated GDD correlated with plant biometrical parameters during trial years. HTC showed moisture effect on rape emergence time. Sowing date was important factor which had strong and significant impact on biometrical parameters of rape plants in autumn. Earlier sowing date increased height of growth point, root neck diameter, plant and root mass, and main root length significantly for both cultivars in four trial years. Such agro-ecological factor as sowing rate (plant density) affected plant biometrical parameters only in some trial years. Plant weight was significantly influenced by sowing rate for both cultivars if sowing rates were equal. Other important parameter - height of growth point - was not significantly influenced by sowing rate for both cultivars when similar sowing rates were used in all years; exception was year 2009 for 'Californium'.

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Mots clés AGROVOC

automne autumn biometria biometrie biometry brassica napus crecimiento croissance cultivos de invierno culture d'hiver date de semis dosis de siembra dry matter fecha de siembra fongicide fungicidas fungicides growth latvia letonia lettonie meteorological factors recherche research sowing date sowing rates winter crops

Informations bibliographiques

Publié dans

Research for Rural Development. International Scientific Conference Proceedings (Latvia)

Numéro 17/2011 ISSN 1691-4031

Editeur

Latvia University of Agriculture

Pagination

p. 6-12

D'autres materias

Otono; Investigacion; Densite de semis; Condiciones atmosfericas; Conditions meteorologiques

Langue

anglais

Note

Summary (En)

2 tables, 4 fig., 16 ref.

Type

Conference; Summary

Source

Research for Rural Development 2011. Annual 17th International Scientific Conference Proceedings. Volume No 1, Gaile, Z..- Jelgava (Latvia): Latvia University of Agriculture, 2011. International Scientific Conference: Research for Rural Development, 17, Jelgava (Latvia), 18-20 May 2011.- p. 6-12

Conférence

International Scientific Conference: Research for Rural Development, 17, Jelgava (Latvia), 18-20 May 2011

Sur AGRIS depuis: 2011-01-15

Format: AGRIS AP

Fournisseur de données

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

Découvrez la collection de ce fournisseur de données dans AGRIS

Liens

http://www.llu.lv/getfile.php?id=44020

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