Page 226 - PC2019 Program & Proceedings

PLANT CANADA 2019

TOPIC 2: Agronomic Crop Production (Posters P25-P29)

P25. Performances of early and late maturing oat varieties in cold regions, China
Zhou, Q.
Southwest Minzu University

Oats are widely used in cold regions as forage and grain crop in China, with early maturing oat varieties
having long planting history. However, the systematic evaluation on yield and quality of the oat varieties
in these regions has not been conducted. Qinghai and Inner Mongolia are typically cold regions in China
due to high elevation and high latitude respectively, and are representative areas for experimentation on
growing oats in cold regions. In this study, we tested production and quality of early and late maturing oat
varieties at five locations in Qinghai Province and one location in Inner Mongolia Autonomous Regions.
The results showed that, in the regions of Qinghai Province with high altitude, forage yield and quality
parameters of the early maturing varieties were not significantly different from those of the late maturing
2
varieties. However, seed yield of the early maturing varieties (3702 kg/hm ) was significantly higher than
2
that of the late maturing varieties (2759 kg/hm ). In the regions of Inner Mongolia with high latitude, the
2
2
dried forage yield (3209 kg/hm ) and seed yield (8110 kg/hm ) of the early maturing varieties were
significantly higher than those of the late maturing varieties. Therefore, early maturing oat varieties
should be used as both cereal and forage in the cold regions.
Qingping Zhou (qpingzh@aliyun.com)

P26. Yield stability of Canada Western Spring wheat under organically managed systems
2
1
Kubota, H. ; D. Spaner ; M. Iqbal 2
1 Government of Canad
2 University of Alberta
Organically grown wheat normally needs to deal with multiple biotic and abiotic stresses to achieve high
grain yield. There is an assumption that important traits to overcome such stresses have been lost as new
wheat cultivars were bred under optimum growing conditions. Although the recognized advantages of old
cultivars in organic systems, low yield potential in those cultivars need to be addressed. Moreover, yield
stability under various stresses is not well explored between old and modern cultivars under organic
systems. Therefore, in this study, fifteen spring wheat cultivars registered from 1910 to 2011 were grown
in organically managed fields to evaluate whether old cultivars have more stable and higher grain yield
compared to modern cultivars. Generally, modern wheat cultivars yielded well under tested organic fields.
Modern wheat cultivars CDC Kernen and Superb showed high stability under tested environments, and
their average grain yields were one of the highest among tested cultivars. CDC Stanley had the highest
average grain yield but poor stability. According to AMMI biplots, CDC Stanley was high nitrogen
responsiveness under adequate rainfall, while CDC Kernen and Superb yielded well even under dry
conditions (e.g., 67 % of 30 years average precipitation). Our result indicated that high-yielding modern
wheat cultivars can yield stable under organic systems. Further research is necessary to understand key
traits in those modern cultivars that contribute to their yield stability.

Hiroshi Kubota (hiroshi.kubota@canada.ca)

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