Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (1): 58-62.doi: 10.11924/j.issn.1000-6850.2013-1928

Special Issue: 农业气象

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Effects of Extreme Drought on Soil Respiration in the Phyllostachys pubescens Forest

Xu Shenghua1, Zhou Benzhi2, Li Qian2, Hu Shuzhen3   

  • Received:2013-07-15 Revised:2013-08-13 Online:2014-01-05 Published:2014-01-05

Abstract: In order to predict the effect of drought and high temperature on forest carbon cycling in the context of climate change, a throughfall exclusion experiment was carried out to explore effects of increased soil temperature and decreased soil water content on soil respirations in the bamboo forest in north Zhejiang of China. The results showed that: (1) monthly variation in soil respiration ranged from 0.63 to 2.00μmol/(m2·s) and 0.66 to 2.20μmol/(m2·s) in throughfall exclusion and control plots respectively. The soil respiration monthly variation followed the monthly variation of soil temperature and in contrast to the monthly variation of the soil water content. (2) Soil temperature could explain 65.5% and 73.9% of the variance of soil respiration in throughfall exclusion and control plots respectively. Multivariate linear model based on temperature and soil water content explained 66.9% and 73.4% of the variance of soil respiration in throughfall exclusion and control plots respectively. Soil water content had no significant relationship with soil respiration. Q10 values of throughfall exclusion and control plots were 4.44 and 5.99.