国家自然科学基金青年项目（31800333）；中央引导地方科技发展基金项目（桂科AD20238078，桂科AD19245133）；广西自然科学基金项目（2018GXNSFBA138009，2021GXNSFBA196021）；南宁师范大学科研启动项目（602021239257）；北部湾环境演变与资源利用教育部重点实验室（南宁师范大学）开发或系统基金项目（NNNU-KLOP-X1917）资助
CHAO Lin
Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Institute of Geography and Oceanography, Nanning Normal University, Nanning 530001, China;Huitong National Research Station of Forest Ecosystem, Huitong 418307, Hunan, ChinaWANG Aihua
Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Institute of Geography and Oceanography, Nanning Normal University, Nanning 530001, China;Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China为了解干旱死亡叶片与自然凋落叶化学性质的差异性，对云南元江干热河谷5种植物（鞍叶羊蹄甲、白皮乌口树、灰毛浆果楝、细基丸和九里香）干旱死亡叶片和自然凋落叶化学性质进行比较分析。结果表明，干旱死亡叶片和自然凋落叶在碳和养分化学特性上表现出较大变异，且不同树种间存在极显著差异（P<0.001）。与自然凋落叶相比，干旱死亡叶片具有较高的可溶性碳、C/N比和Mg含量，而木质素、半纤维素和N含量则较低。干旱死亡叶片与自然凋落叶间的碳（R2=0.56，P< 0.01）、纤维素（R2=0.52，P<0.01）、半纤维素（R2=0.85，P<0.001）、单宁（R2=0.99，P<0.001）、木质素/N （R2=0.60，P<0.01）、C/N （R2=0.64，P<0.001）和氮含量（R2=0.85，P<0.001）呈显著正相关。因此，可根据自然凋落叶化学性质预测未来极端干旱条件下干旱死亡叶片的化学性质。
To understand the difference in chemical properties between drought-dead and natural litter leaves, the chemistry traits in leaves of five species in Yuanjiang Savanna Ecosystem Research Station, such as Bauhinia brachycarpa, Tarenna depauperate, Cipadessa baccifera, Polyalthia cerasoides and Rubus pungens, were studied. The results showed that the chemical characteristics of carbon and nutrients had great variation between drought-dead and natural litter leaves, and there were very significant differences among these tree species (P<0.001). Compared with natural litter leaves, drought-dead leaves had high dissolved organic carbon, C/N and magnesium, but the concentration of lignin, hemicellulose and nitrogen was low. Furthermore, the chemical traits of drought-dead leaves had positive correlation with nature litter leaves, such as the concentration of carbon (R2=0.56,P<0.01), cellulose (R2=0.52, P<0.01), hemicellulose (R2=0.85, P<0.001), tannin (R2=0.99,P<0.001), lignin/N (R2=0.60,P<0.01), C/N (R2=0.64,P<0.001) and nitrogen (R2=0.85, P<0.001). Therefore, according to the chemical properties of natural litters, the chemical properties of drought-dead leaves under extreme drought conditions could be predicted in the future.
巢林,李忠国,杨大新,王爱华,张建兵,胡宝清,刘艳艳.干旱死亡叶片与自然凋落叶化学性质对比研究[J].热带亚热带植物学报,2022,30(1):79~87
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