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

Abstract : 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.
Document type :
Journal articles
Complete list of metadatas

https://hal-agroparistech.archives-ouvertes.fr/hal-01367935
Contributor : Thierry Doré <>
Submitted on : Saturday, September 17, 2016 - 2:21:47 PM
Last modification on : Tuesday, May 23, 2017 - 11:21:04 AM
Long-term archiving on : Sunday, December 18, 2016 - 3:55:19 PM

File

Doré et al 1998 pour hal.pdf
Files produced by the author(s)

Licence


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

Identifiers

Collections

Citation

Thierry Doré, Jean-Marc Meynard, Michel 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, Elsevier, 1998, 8 (1-2), pp.29-37. ⟨10.1016/S1161-0301(97)00006-3⟩. ⟨hal-01367935⟩

Share

Metrics

Record views

185

Files downloads

283