The role of grain number, nitrogen nutrition and stem number in limiting pea crop (Pisum sativum) yields under agricultural conditions - AgroParisTech Accéder directement au contenu
Article Dans Une Revue European Journal of Agronomy Année : 1998

The role of grain number, nitrogen nutrition and stem number in limiting pea crop (Pisum sativum) yields under agricultural conditions

Thierry Doré
Jean-Marc Meynard
Michel M. Sebillotte
  • Fonction : Auteur

Résumé

In a small area of the Paris basin in France, 71 pea (Pisum sativum) crops, cv. Solara, were examined to elucidate the determinants of their yield over 3 years. The yields ranged from between 3.71 and 7.81 t ha−1, and averaged 5.85, 6.25 and 6.47 t ha−1 in 1988, 1989 and 1990, respectively. The large differences observed each year among fields were essentially related to grain number, whereas mean grain weight was less variable. Grain number and pod number were highly correlated. A substantial effect of nitrogen nutrition, assessed by a nitrogen nutrition index on grain number, was observed. The role of reproductive stem number on grain number was also examined, showing a threshold at 115 stems m−2, below which, under the conditions examined, large grain numbers per stem did not compensate for low stem numbers. Furthermore, we also show that branching might not be sufficient to compensate for low plant numbers in some crops when nitrogen nutrition is inadequate, and this also leads to a decrease in grain number.
Fichier principal
Vignette du fichier
Doré et al 1998 pour hal.pdf (83.47 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01367935 , version 1 (17-09-2016)

Licence

Paternité - Pas d'utilisation commerciale - Pas de modification

Identifiants

Citer

Thierry Doré, Jean-Marc Meynard, Michel M. Sebillotte. The role of grain number, nitrogen nutrition and stem number in limiting pea crop (Pisum sativum) yields under agricultural conditions. European Journal of Agronomy, 1998, 8 (1-2), pp.29-37. ⟨10.1016/S1161-0301(97)00006-3⟩. ⟨hal-01367935⟩
109 Consultations
412 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More