详细信息
干旱死亡叶片与自然凋落叶化学性质对比研究 被引量:1
Comparison of Chemical Traits between Drought-dead and Natural Litter Leaves
文献类型:期刊文献
中文题名:干旱死亡叶片与自然凋落叶化学性质对比研究
英文题名:Comparison of Chemical Traits between Drought-dead and Natural Litter Leaves
作者:巢林[1,2] 李忠国[3] 杨大新[4] 王爱华[1,5] 张建兵[1] 胡宝清[1] 刘艳艳[1]
第一作者:巢林
机构:[1]南宁师范大学地理与海洋研究院,北部湾环境演变与资源利用教育部重点实验室,广西地表过程与智能模拟自治区重点实验室,南宁530001;[2]湖南会同森林生态系统国家野外科学观测研究站,湖南会同418307;[3]中国林业科学研究院热带林业实验中心,广西友谊关森林生态系统国家定位观测研究站,广西凭祥532600;[4]中国科学院西双版纳热带植物园,元江干热河谷生态系统研究站,云南元江653300;[5]中国科学院华南植物园植物资源保护与可持续利用重点实验室,广州510650
年份:2022
卷号:30
期号:1
起止页码:79-87
中文期刊名:热带亚热带植物学报
外文期刊名:Journal of Tropical and Subtropical Botany
收录:CSTPCD;;北大核心:【北大核心2020】;CSCD:【CSCD_E2021_2022】;
基金: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。
语种:中文
中文关键词:干旱;干热河谷;凋落物;化学性质
外文关键词:Drought;Dry-hot valley;Litter-fall;Chemical property
分类号:Q948
摘要: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(R^(2)=0.56,P<0.01)、纤维素(R^(2)=0.52,P<0.01)、半纤维素(R^(2)=0.85,P<0.001)、单宁(R^(2)=0.99,P<0.001)、木质素/N(R^(2)=0.60,P<0.01)、C/N(R^(2)=0.64,P<0.001)和氮含量(R^(2)=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(R^(2)=0.56, P<0.01), cellulose(R^(2)=0.52, P<0.01), hemicellulose(R^(2)=0.85, P<0.001), tannin(R^(2)=0.99, P<0.001),lignin/N(R^(2)=0.60, P<0.01), C/N(R^(2)=0.64, P<0.001) and nitrogen(R^(2)=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.
参考文献:
正在载入数据...