Effects of Rainfall on Dissolved Organic Carbon of Canopy Transport in a Secondary Forest of Castanopsis carlesii and Cunninghamia lanceolata PlantationChinese Full Text
LV Mao-kui;XIE Jin-sheng;LIN Ting-wu;JIANG Miao-hua;ZHANG Hao;WANG En-xi;QIU Xi;PU Xiao-ting;YANG Yu-sheng;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology,College of Geographical Science,Fujian Normal University;
Abstract: To determine the characteristic of carbon transport under different rainfall event in the secondary broadleaved forest and coniferous forest,the dissolved organic carbon（DOC）concentration which from the canopy was measured and dynamics of DOC concentration change was analyzed during different rainfall conditions in a secondary broadleaved forest of Castanopsis carlesii（BF）and plantation forest of Cunninghamia lanceolata（Chinese fir）（CF）.The results showed that a positive power function correlation（R2＞0.81 for the Castanopsis carlesii and R2＞0.88 for the Chinese fir）was found from the stemflow of Castanopsis carlesii and Chinese fir with the diameter at breast height（DBH）.DOC concentration of the stemflow was negative power function correlation with its DBH for Castanopsis carlesii.Instead,there was a significant and positive power function correlation between the stemflow DOC concentration and DBH in Chinese fir（R2＞0.69,P＜0.05）.The relative increment of DOC concentration in throughfall happened in BF versus that in precipitation was higher than in CF,and that the range of increment for BF was greatly higher than CF,indicated that the effects of precipitation on throughfall in BF was greater than that in CF.Overall,the stemflow DOC concentration in BF（48.8mg/L）was significant higher than that in CF（23.4mg/L）（P＜0.05）.In addition,with the increase of precipitation,the stemflow DOC concentration of BF appeared a decreased trend,crosscurrent in CF,which demonstrated that different response of stemflow DOC concentration to change of rainfall with different tree species,and also the duration of rainfall performance a significant influence on concentration of DOC in throughfall and stemflow.
- DOI：
10.13870/j.cnki.stbcxb.2014.05.024
- Series：
- Subject：
- Classification Code：
S715
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