Yubi, Y., Jun, L.,
Haiyang, N.
and Xiuyun, Z.
2020
Combined impact of elevated CO2
concentration and climatic warming
on potato yield and quality
in semi-arid regions.
Potato Research,
https://doi.org/10.1007/s11540-020-09466-w.
FULL SUMMARY HERE:
http://www.co2science.org/articles/V23/oct/a8.php
My Short Summary Follows:
Semi-arid regions of the loess plateau in China are a major potato growing region, and the potato is the fourth major global food crop behind rice, wheat and corn (maize).
Potato yields in elevated temperature (+2 degrees C.) were low because potato crops prefer cool temperatures. Increasing the CO2 concentration to 650 ppm reduced this heat stress. Yields with the elevated temperature and elevated CO2 were +13% greater than the control treatment, and +60% greater than the stressed elevated temperature treatment.
Figure 1:
Potato yield (kg ha-1) of plants grown in open-top chambers under three temperature and atmospheric CO2 treatments: Control (370 ppm CO2 and ambient temperatures), Elevated Temperature (370 ppm CO2 and temperatures 2°C above ambient) and Elevated Temperature & Elevated CO2 (650 ppm CO2 and temperatures 2°C above ambient).