Declining rapeseed yields in Finland: how, why and what next? Export

@article{J_AGR_SCI_V145pp587-598, abstract = {Average seed yields per hectare of Brassica oilseed crops in Finland, mainly summer turnip rape (Brassica rapa L. var. oleifera subvar. annua), which covers 00kg/ha in the early 1990s. By 2005 it had fallen to 1270and such temperatures often occurred during the years of greatest yield reduction. When taking into account how commonly sown these cultivars were at national level during the last 10 years, increased sensitivity contributed to up to two thirds of the recorded yield reduction. Even though the growing area of turnip rape has slightly exceeded 100 00070 000 ha, by extending cultivation to more northern areas of Finland, such changes do not explain the yield collapse according to data from TIKE. Furthermore, lower national yields do not stem from larger, but rather are associated with narrower within year variation in seed yield. Additional empirical work is needed to understand the causes of increased temperature sensitivity in modern cultivars (e.g. possible linkage to drought, diseases and/or drastically increased seed energy content). Furthermore, a national survey is essential for a thorough and up-to-date picture of the prevalence of pests and diseases in turnip rape and their contribution to reduced yields.}, author = {Peltonen-Sainio, Pirjo and Jauhiainen, Lauri and Hannukala, A.}, citeulike-article-id = {5073226}, citeulike-linkout-0 = {http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=1372352}, citeulike-linkout-1 = {http://dx.doi.org/10.1017/S0021859607007381}, doi = {10.1017/S0021859607007381}, journal = {The Journal of Agricultural Science}, keywords = {agriculture, breeding, finland, rapeseed, sensitivity, temperature, variability, yield}, number = {06}, pages = {587--598}, posted-at = {2009-11-04 17:24:02}, priority = {0}, title = {Declining rapeseed yields in Finland: how, why and what next?}, url = {http://dx.doi.org/10.1017/S0021859607007381}, volume = {145}, year = {2007} }

TY - JOUR ID - J_AGR_SCI_V145pp587-598 L3 - citeulike-article-id:5073226 N2 - Average seed yields per hectare of Brassica oilseed crops in Finland, mainly summer turnip rape (Brassica rapa L. var. oleifera subvar. annua), which covers 00kg/ha in the early 1990s. By 2005 it had fallen to 1270and such temperatures often occurred during the years of greatest yield reduction. When taking into account how commonly sown these cultivars were at national level during the last 10 years, increased sensitivity contributed to up to two thirds of the recorded yield reduction. Even though the growing area of turnip rape has slightly exceeded 100 00070 000 ha, by extending cultivation to more northern areas of Finland, such changes do not explain the yield collapse according to data from TIKE. Furthermore, lower national yields do not stem from larger, but rather are associated with narrower within year variation in seed yield. Additional empirical work is needed to understand the causes of increased temperature sensitivity in modern cultivars (e.g. possible linkage to drought, diseases and/or drastically increased seed energy content). Furthermore, a national survey is essential for a thorough and up-to-date picture of the prevalence of pests and diseases in turnip rape and their contribution to reduced yields. IS - 06 JF - The Journal of Agricultural Science EP - 598 TI - Declining rapeseed yields in Finland: how, why and what next? VL - 145 SP - 587 KW - agriculture KW - breeding KW - finland KW - rapeseed KW - sensitivity KW - temperature KW - variability KW - yield AU - Peltonen-Sainio, Pirjo AU - Jauhiainen, Lauri AU - Hannukala, A PY - 2007/// UR - http://dx.doi.org/10.1017/S0021859607007381 ER -