在极端干旱事件中，毛竹林的土壤呼吸显著受总生态系统生产力和叶面积指数的影响。
Soil respiration of a Moso bamboo forest significantly affected by gross ecosystem productivity and leaf area index in an extreme drought event.
作者信息
Liu Yuli, Zhou Guomo, Du Huaqiang, Berninger Frank, Mao Fangjie, Li Xuejian, Chen Liang, Cui Lu, Li Yangguang, Zhu Di'en
机构信息
State Key Laboratory of Subtropical Silviculture, Zhejiang Agricultural and Forestry University, Lin'an, Hangzhou city, Zhejiang province, China.
Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province, Zhejiang Agricultural and Forestry University, Lin'an, Hangzhou city, Zhejiang province, China.
出版信息
PeerJ. 2018 Oct 31;6:e5747. doi: 10.7717/peerj.5747. eCollection 2018.
Moso bamboo has large potential to alleviate global warming through carbon sequestration. Since soil respiration ( ) is a major source of CO emissions, we analyzed the dynamics of soil respiration ( ) and its relation to environmental factors in a Moso bamboo () forest to identify the relative importance of biotic and abiotic drivers of respiration. Annual average was 44.07 t CO ha a. correlated significantly with soil temperature ( < 0.01), which explained 69.7% of the variation in at a diurnal scale. Soil moisture was correlated significantly with on a daily scale except not during winter, indicating it affected . A model including both soil temperature and soil moisture explained 93.6% of seasonal variations in . The relationship between and soil temperature during a day showed a clear hysteresis. was significantly and positively ( < 0.01) related to gross ecosystem productivity and leaf area index, demonstrating the significance of biotic factors as crucial drivers of .
毛竹通过碳固存缓解全球变暖的潜力巨大。由于土壤呼吸是二氧化碳排放的主要来源，我们分析了毛竹林土壤呼吸的动态变化及其与环境因素的关系，以确定呼吸作用中生物和非生物驱动因素的相对重要性。年平均土壤呼吸量为44.07吨二氧化碳每公顷每年。土壤呼吸与土壤温度显著相关（P<0.01），在日尺度上，土壤温度解释了土壤呼吸变化的69.7%。除冬季外，土壤湿度在每日尺度上与土壤呼吸显著相关，表明其对土壤呼吸有影响。包含土壤温度和土壤湿度的模型解释了土壤呼吸季节变化的93.6%。一天中土壤呼吸与土壤温度之间的关系呈现明显的滞后现象。土壤呼吸与生态系统总生产力和叶面积指数显著正相关（P<0.01），表明生物因素作为土壤呼吸关键驱动因素的重要性。
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