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ZERO GERMINATION [1 record]

Record 1 2010-03-08

English

Subject field(s)
  • Atmospheric Physics
  • Plant Biology
  • Plant and Crop Production
CONT

It was observed that the germination in laboratory was significantly lower than the germination percentages printed on the envelope, being those ones 14; 55; 48 and zero of germination, while in the envelopes were displayed 65; 94; 80 and 80%, respectively. It was observed that the seeds had dormancy, since after the imbibition and pre-chilling treatment the germination percentages increased becoming 62; 80; 67, and 24%, respectively.

French

Domaine(s)
  • Physique de l'atmosphère
  • Biologie végétale
  • Cultures (Agriculture)
DEF

Température au-dessous de laquelle une graine ne germe pas.

CONT

Température : Zéro de germination 5 °C. Le tournesol demande un climat chaud. Sa teneur en huile dépend beaucoup de la quantité de chaleur que reçoit la plante, tout particulièrement durant la phase de maturation des graines.

OBS

Les zéros de végétation ou de germination correspondent à des seuils climatiques.

OBS

Pour de nombreuses espèces cultivées en France (avoine, blé, orge, seigle, colza), le zéro de germination et le zéro de végétation sont voisins de zéro degré Celsius (0 °C). Pour certaines espèces ils sont plus élevés : 1 °C pour la luzerne, 5 °C pour le tournesol et la betterave, 6 °C pour le maïs, 10 °C pour le haricot et le sorgho, 10 °C à 12 °C pour le riz.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
  • Biología vegetal
  • Producción vegetal
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