Abstract Detail

Physiological Section

Gao, Libiao [1], Caldwell, Claude D. [1], Lynch, Derek H. [1], Lada, Raj. R [2].

Comparative effects of water deficit and applied nitrogen on physiological responses and biomass accumulation of camelina (Camelina sativa L. Crantz.) and canola (Brassica napus L.) under controlled environments.

This study compared key aspects of the physiology and agronomy of Camelina sativa and Brassica napus under controlled environments in 2013 and 2014. The study showed that the response of both crops to N depended on the soil water status. Camelina maintained higher photosynthesis at N levels over 125 kg ha^-1 under water deficit. Water deficit significantly decreased transpiration rate and stomatal conductance of both crops. Applied N decreased stomatal conductance of canola but increased the same parameter of camelina. There was no N*water status interactive effect on biomass or seed yield of either crop. A higher shoot/root ratio in camelina indicates a better adaptability to imposed water deficit. Future experiments should evaluate field level water use efficiency by both crops to confirm the controlled environment results.

1 - Dalhousie University, Plant and Animal Sciences, P.O. Box 550, Truro, NS, B2N5E3, Canada
2 - Dalhousie University, Environmental Sciences, P.O. Box 550, Truro, NS, B2N5E3, Canada

Keywords:
camelina
Canola
water deficit
nitrogen
physiological responses.

Presentation Type: Oral Paper:Papers for Sections
Session: 53
Location: Salon 16/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 2:15 PM
Number: 53002
Abstract ID:382
Candidate for Awards:Physiological Section Physiological Section Li-COR Prize