[Effects of simulated soil warming on the growth and physiological characters of Deyeuxia angustifolia].
By using improved heating cables, a field experiment was conducted to study the effects of 1 degrees C-30 degrees C soil warming on the growth and physiological characters of Deyeuxia angustifolia. Soil warming obviously promoted the growth of D. angustifolia. Under flooded condition, the plant height increased by 18.2%, leaf area increased by 37.32%, root volume increased by 24.67%, total root absorbing area increased by 60% , and tillers number increased by 25.81%; under unflooded condition, the plant height increased by 12.09%, leaf area increased by 32.9%, root volume increased by 36.26%, total root absorbing area increased by 37.47%, and tillers number increased by 32.77%. The responses of D. angustifolia physiological indices to soil warming were more obvious under flooded than under un-flooded condition. Under flooded condition, the total chlorophyll content and root soluble protein content increased by 9.8% and 23.88%, while the leaf soluble protein and soluble carbon contents and root soluble carbon content decreased by 25.02%, 22.92%, and 35.23%, respectively. 1 degrees C-30 degrees C soil warming promoted the growth of D. angustifolia, but the responses of its physiological characters to the soil warming varied with water conditions.
Dou
Jing-Xin
JX
Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, China. wywdyy2006@163.com
Liu
Jing-Shuang
JS
Wang
Yang
Y
Zhao
Guang-Ying
GY
D002681:China; D006358:Hot Temperature; D006109:Poaceae / Q000254:growth & development* / Q000502:physiology*; D012987:Soil / Q000032:analysis; D014867:Water / Q000032:analysis*; D053833:Wetlands
D012987:Soil; D014867:Water