Effect of Sowing Date and Cultivar on Root System Development in Pea (Pisum sativum L.) |
| |
Authors: | Aurélie Vocanson Marie-Hélène Jeuffroy Jean Roger-Estrade |
| |
Institution: | (1) Unité Mixte d’Agronomie Institut, National de Recherche en Agronomie – Institut National Agronomique de Paris-Grignon, BP01, 78850 Thiverval-Grignon, France |
| |
Abstract: | In many species, root system development depends on cultivar and sowing date, with consequences for aerial growth, and seed
yield. Most of the peas (Pisum sativum L.) grown in France are sown in spring or in mid-November. We analyzed the effect of two sowing periods (November and February)
and three pea cultivars (a spring cultivar, a winter cultivar, a winter recombinant inbred line) on root development in field
conditions. For all treatments, rooting depth at various dates seemed to be strongly correlated with cumulative radiation
since sowing. Maximum root depth varied from 0.88 to 1.06 m, with the roots penetrating to greater depths for February sowing
than for November sowing in very cold winters. The earlier the crop was sown, the sooner maximum root depth was reached. No
difference in root dynamics between cultivars was observed. In contrast, the winter recombinant inbred line presented the
highest root density in the ploughed layer. These findings are discussed in terms of their possible implications for yield
stability and environmental impact. |
| |
Keywords: | incident solar radiation maximum root depth Pisum sativum L root distribution root system elongation rate thermal time |
本文献已被 SpringerLink 等数据库收录! |
|