Effects of simulated soil warming on the growth and physiological characters of Deyeuxia angustifolia

Dou Jing-xin; Liu Jing-shuang; Wang Yang; Zhao Guang-ying
August 2009
Yingyong Shengtai Xuebao;Aug2009, Vol. 20 Issue 8, p1845
Academic Journal
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.


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