Seasonal changes in soil respiration and microbial biomass in five tropical tree plantations in Thailand
Seasonal changes in soil respiration and microbial biomass in five tropical tree plantations in Thailand
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DOI：
10.3759/tropics.msms15-18
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发表时间：
2016-08
期刊：
影响因子：
0.7
通讯作者：
Taiki Mori;C. Wachrinrat;D. Staporn;Ponthep Meunpong;Warawich Suebsai;Khitja Boonsri;K. Kitayama
中科院分区：
文献类型：
--
作者：
Taiki Mori;C. Wachrinrat;D. Staporn;Ponthep Meunpong;Warawich Suebsai;Khitja Boonsri;K. Kitayama
由于微生物生物量是通过土壤有机养分矿化或微生物周转控制土壤养分动态的关键因素，因此研究微生物活动和生物量的季节变化对于更好地了解种植园养分动态至关重要。研究了5种热带人工林土壤呼吸、微生物生物量碳（MBC）和微生物生物量氮（MBN）的季节变化。虽然CO2排放量和MBN含量在热雨季较高，冷干季较低，但冷干季的MBC含量与雨季持平。我们推测MBC和MBN对冷干条件的不同反应是由于微生物区系的变化或个体对干旱的适应。本研究中观察到的微生物动态对土壤养分动态的影响需要在未来进行研究。
Since microbial biomass is a key factor controlling nutrient dynamics in the soil through mineralization of soil organic nutrients or microbial turnover, investigating the seasonal changes of microbial activities and biomass is essential for better understanding the nutrient dynamics in tree plantation. We investigated the seasonal changes in soil respiration, microbial biomass carbon (MBC), and microbial biomass nitrogen (MBN) in five tropical tree plantation stands. Although CO2 emissions and MBN contents were high in hot-rainy season and low in cool-dry season, MBC contents in cool-dry season kept in the same level as rainy season. We assumed that the different response of MBC and MBN to cool-dry condition was because of the changes in microbial fauna or individual adaptation for drought. The influence of the microbial dynamics observed in the present study on soil nutrient dynamics needs to be studied in the future.