The Determination and Verification of a Baseline Temperature for the Growth of Westar Summer Rape

Morrison, Malcolm J.; McVetty, P. B. E.; Shaykewich, C. F.

doi:10.4141/cjps89-057

Cited by 105 publications

(62 citation statements)

References 3 publications

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“…Para a cultura da canola, espécie da mesma família, a temperatura basal inferior de 5 ºC é comumente adotada para quantificação da soma térmica (Morrison et al,1989;Dalmago et al, 2008). A diferença entre as temperaturas basais observadas para o período EME-MAT do crambe, de 9,5 ºC e 8,9 ºC, com a referida Tb da cultura da canola, refletem-se na resistência a baixas temperaturas.…”

Section: Resultsunclassified

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Temperatura basal, duração do ciclo e constante térmica para a cultura do crambe

Pilau¹,

Battisti

Somavilla

et al. 2011

Bragantia

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Resumo A cultura do crambe surge como alternativa de produção, destacando sua precocidade e o potencial para a produção de óleo, em estação fria. A escassez de informações sobre parâmetros climáticos e fenológicos conduziu à determinação da temperatura basal inferior, da duração do ciclo e da constante térmica da cultura do crambe em Frederico Westphalen (RS). O trabalho foi composto por sete épocas de semeadura em 2009 e quatro em 2010. A temperatura basal inferior foi determinada pelos métodos do menor desvio-padrão e do desenvolvimento relativo. A temperatura basal para o subperíodo emergência-maturação (EME-MAT) foi de 9,5 ºC, enquanto para os subperíodos emergência-início da floração (EME-IFLO), emergência-fim da floração (EME-FFLO) e início da floração-fim da floração (IFLO-FFLO) foram, respectivamente, de 10,2 ºC, 10,8 ºC e 10,0 ºC, obtidas pelo método do menor desvio-padrão. O subperíodo compreendido entre EME-MAT variou de 74 a 136 dias, com duração média de 96 dias. Para os subperíodos EME-IFLO, EME-FFLO e IFLO-FFLO a duração média foi, respectivamente, de 52, 82 e 29 dias. Considerando-se os valores de temperatura basal para cada subperíodo, a duração média entre EME-MAT foi de 691 ºC dia, variando entre 576 ºC dia e 792ºC dia. Para os subperíodos EME-IFLO, EME-FFLO e IFLO-FFLO, a duração média do foi de 279 ºC dia; 444 ºC dia e 220 ºC dia, respectivamente. Palavras-chave:Crambe abyssinica Hochst., temperatura, fenologia. Basal temperature, crop growth cycle duration and growing degree-days of crambe AbstractCrambe is an alternative crop, precocious and with potential to produce oil during the cold season. The scarcity of information about climatic and phenological parameters led to the determination of basal temperature, crop growth cycle duration and growing degree-days of Crambe. The research was composed of seven sowing dates in 2009 and four in 2010. Basal temperature was determined by the methods of least variability and relative development. The basal temperature for the subperiod emergence-maturation (EME-MAT) was 9.5 °C, whereas for the subperiods seedling emergency-early flowering stage (EME-IFLO), seedling emergency-end of flowering (EME-FFLO) and early flowering-end of flowering (IFLO-FFLO) were 10.2 ºC, 10.8 °C and 10.0 ºC, respectively. The subperiod between EME-MAT ranged from 74 to 136 days with an average duration of 96 days. For EME-FLO, EME-FFLO and IFLO-FFLO the average duration was 52, 82 and 29 days, respectively. Considering the values of basal temperature for each period or subperiod, the average time between EME-MAT was 691 ºC day, ranging between 576 ºC day and 792 ºC day. For EME-IFLO, EME-FFLO and IFLO-FFLO, the average was 279 ºC day, varying between 444 °C day and 220 ºC day.

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Section: Resultsunclassified

“…Toebe et al (2010), com o mesmo valor de temperatura basal inferior destacado por Kmec et al (1998), obtiveram de 1165,3 ºC dia a 1175,8 ºC dia entre emergência e senescência. Para a cultura da canola, outra crucífera, semeada em mesma época, Morrison et al (1989) relatam uma temperatura base inferior (cv. Westar), próxima a 5 ºC.…”

Section: Introductionunclassified

Temperatura basal, duração do ciclo e constante térmica para a cultura do crambe

Pilau¹,

Battisti

Somavilla

et al. 2011

Bragantia

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“…In the field in western Canada, domesticated spring B. napus produces approximately 7 leaves, each taking about 46 GDD to develop (Morrison and McVetty 1991) and in a growth chamber study, B. napus leaf area expansion and leaf area duration was stable over a range of temperatures when expressed based on GDD (Morrison et al 1989). In India, the rate of leaf appearance in domesticated B. rapa was consistently more rapid than in domesticated B. napus over a range of 5 sowing dates (Oct. 19 to Dec. 09), particularly in the later emerging leaves (leaves 8 to 14) (Nanda et al 1995).…”

Section: Historymentioning

confidence: 98%

“…In domesticated B. napus, flowering was reached at about 576 GDD (about 47 d), pod fill was reached at about 860 GDD (about 66 d) and maturity was reached at about 1157 GDD (about 87 d) in western Canada (Morrison et al 1989;Kimber and McGregor 1995) with similar thermal time requirements in eastern Canada (Morrison and Stewart 2002). Domesticated B. rapa required about 60 d to reach maturity in western Canada (Kimber and McGregor 1995).…”

Section: Historymentioning

confidence: 99%

The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa L.

Gulden¹,

Warwick²,

Thomas³

2008

Can. J. Plant Sci.

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. 2008. The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa. Can. J. Plan Sci. 88: 951Á996. Brassica napus and B. rapa are native to Eurasia. In Canada, these species are commonly referred to as volunteer canola, while feral populations of B. rapa are referred to as birdrape. Brassica napus and B. rapa have been grown commercially for their seed oil content in western Canada since the middle of the last century and volunteer populations are common in fields. Escaped populations of both species are also found along roadways, railways and in waste areas; however, only B. rapa is known to have naturalized, self-sustaining feral populations in these habitats in eastern Canada. Despite these escaped and feral populations, B. napus and B. rapa are mainly a concern in agricultural fields where their combined relative abundance has increased over the past few decades. In the mid 1990s, herbicideresistant genotypes of B. napus were released for commercial production. Herbicide-resistance and the stacking of genes in volunteer populations conferring resistance to multiple herbicides have contributed to increased difficulties in controlling volunteer B. napus in some crops. However, yield loss resulting from volunteer populations is not well documented in Canada.Key words: Brassica napus, Brassica rapa, herbicide resistance, transgene escape, volunteer canola, weed biology Gulden, R. H., Warwick, S. I. et Thomas, A. G. 2008. La biologie des mauvaises herbes au Canada. 137. Brassica napus L. et B. rapa L. Can. J. Plant Sci. 88: 951Á996. Brassica napus et B. rapa sont des plantes originaires d'Eurasie. Au Canada, on les de´signe souvent sous l'expression « canola spontane´», tandis que les peuplements sauvages de B. rapa sont appele´s « navette ». Dans l'Ouest canadien, Brassica napus et B. rapa sont cultive´s commercialement pour l'huile que renferment leurs graines depuis le milieu du sie`cle dernier et les repousses spontane´es sont devenues monnaie courante dans les champs. On observe des peuplements des deux espe`ces le long des routes et des voies ferre´es ainsi que dans les terrains vagues, cependant on sait que seule B. rapa s'est acclimate´e pour donner des populations sauvages et stables dans les meˆmes habitats, dans l'est du pays. Malgre´cela, B. napus et B. rapa demeurent surtout pre´occupants dans les cultures, oul eur abondance relative, une fois combine´s, s'est accrue au cours des dernie`res de´cennies. Au milieu des anne´e 1990, des ge´notypes de B. napus re´sistants aux herbicides ont e´te´homologue´s pour la culture commerciale. Cette re´sistance et l'accumulation des ge`nes qui la codent dans les peuplements spontane´s ont concouru a`compliquer la lutte contre les repousses de B. napus dans certaines cultures. Quoi qu'il en soit, les pertes de rendement qui en re´sultent sont mal e´taye´es au Canada.

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“…The competition among individual plants can influence oilseed rape seed yield (Mendham et al 1981a, Morrison et al 1989. It was found that nitrogen concentration in oilseed rape dry matter tended to increase with increased nitrogen supply and decrease with increased seeding rate (Gramshaw and Crofts 1969).…”

mentioning

confidence: 99%

Factors affecting nitrogen concentration in spring oilseed rape (Brassica napus L.)

Šidlauskas¹,

Tarakanovas²

2004

Plant Soil Environ.

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The effect of the duration of the growth season, meaning daily temperature, precipitation rate, growing degree in days, nitrogen rates and application time, stand population density, soil nitrogen content and the interaction among these factors on nitrogen concentration in spring oilseed rape plants of aboveground dry ma�er. During the vegetative growth season, mature seeds and straw were studied in field experiment with spring oilseed rape (Brassica napus L.) cv. Star over five years. It was found that nitrogen concentration was the highest in the youngest plants. The increase of duration in growth season and precipitation rate had a negative effect on nitrogen concentration in mature seeds. Meanwhile, the increase in growing degree-days and mean daily temperature positively affected seed nitrogen concentration. The relationships between nitrogen concentration in spring oilseed rape plants at different growth stages and climate records was found. Stand population density occurred having a rather negligible effect on nitrogen concentration. Nitrogen fertilizer rates showed strong and positive effect on nitrogen concentration in aboveground dry ma�er as well as in seed and straw. With the delay of nitrogen application time concentration of nitrogen was increasing.

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The Determination and Verification of a Baseline Temperature for the Growth of Westar Summer Rape

Cited by 105 publications

References 3 publications

Temperatura basal, duração do ciclo e constante térmica para a cultura do crambe

Temperatura basal, duração do ciclo e constante térmica para a cultura do crambe

The Biology of Canadian Weeds. 137. Brassica napus L. and B. rapa L.

Factors affecting nitrogen concentration in spring oilseed rape (Brassica napus L.)

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