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[1]何聪,任颖,麦淑媛,等.华西雨屏区几种乡土树种不同物候关键时期凋落物的有机组分特征[J].应用与环境生物学报,2019,25(01):9-15.[doi:10.19675/j.cnki.1006-687x.2018.04002]
 HE Cong,REN Ying,MAI Shuyuan,et al.Characteristics of organic components in litter of several native trees at different phenological stages in the Rainy Area of West China[J].Chinese Journal of Applied & Environmental Biology,2019,25(01):9-15.[doi:10.19675/j.cnki.1006-687x.2018.04002]
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华西雨屏区几种乡土树种不同物候关键时期凋落物的有机组分特征
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年01期
页码:
9-15
栏目:
研究论文
出版日期:
2019-02-25

文章信息/Info

Title:
Characteristics of organic components in litter of several native trees at different phenological stages in the Rainy Area of West China
作者:
何聪 任颖 麦淑媛 袁吉 游成铭 王旭熙 吴福忠
1四川农业大学生态林业研究所,长江上游林业生态工程四川省重点实验室 成都 611130 2西华师范大学国土资源学院 南充 637009
Author(s):
HE Cong1 REN Ying1 MAI Shuyuan1 YUAN Ji1 YOU Chengming1 WANG Xuxi2 & WU Fuzhong1**
1 Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Provinve, Institute of Ecology and Forestry, Sichuan Agricultural University, Chengdu 611130, China 2 Land and Resources College, China West Normal University, Nanchong 637009, China
关键词:
华西雨屏区乡土树种凋落器官叶片物候期有机组分
Keywords:
Rainy Area of West China native tree species falled organ phenological stage litter organic component
分类号:
S718.5
DOI:
10.19675/j.cnki.1006-687x.2018.04002
摘要:
凋落物的有机组分含量可随着植物生长节律及物候期变化而改变. 以华西雨屏区喜树(Camptotheca acuminata)、枫杨(Pterocarya stenoptera)、柏木(Cupressus funebris)和柳杉(Cryptomeria fortune)为研究对象,通过定点动态收集萌芽期、展叶期、盛叶期和落叶期凋落物组成,分析其水溶性组分(Water soluble component,WSC)、有机溶性组分(Organic solvent soluble component,OSC)、酸溶性组分(Acid-soluble extractive,ASE)和酸不溶性组分(Acid-insoluble residue,AIR)的差异. 结果显示,相同树种中,各器官凋落物的WSC相对含量呈现逐渐减小的趋势,OSC相对含量在一年中总体呈现盛叶期增加、落叶期降低的趋势,ASE相对含量在各物候期间变化不显著,AIR相对含量则表现出增加的变化趋势,凋落叶、枝木质纤维素指数(LCI)表现出上升的趋势,凋落果则为下降趋势;同一物候期,凋落物中的WSC相对含量表现为喜树高于其他树种,AIR相对含量表现为针叶树种高于阔叶树种;4个树种凋落叶在盛叶期均表现出较高的WSC和OSC相对含量,凋落枝则有较高的OSC相对含量;萌芽期和盛叶期的凋落枝呈现出较高的ASE相对含量和较低的AIR相对含量与LCI值. 本研究表明,关键时期、物种类型、器官类型及其相互作用对凋落物中WSC、OSC、ASE和AIR相对含量具有不同程度的影响;结果可进一步丰富对生态系统碳的归还等特征的认识. (图4 表1 参42)
Abstract:
The characteristics of organic components in litter play important roles in litter decomposition and other material cycling processes in ecosystems, but the content of organic components in litter would be controlled by leaf phenological rhythms. Therefore, a field investigation was carried out to determine the characteristics of organic components in the litter of several native trees at different phenological stages in the Rainy Area of West China. The represented tree species (Camptotheca acuminata, Pterocarya stenoptera, Cupressus funebris, and Cryptomeria fortunei) with typical leaf phenological rhythms were selected, and litter, including leaf, twig, and fruit, was collected at different phenological stages such as leaf budding, leaf expanding, leaf maturing, and leaf falling. The water-soluble component (WSC), organic-solvent-soluble component (OSC), acid-soluble extractive (ASE), and acid-insoluble residue (AIR) content was analyzed in different fallen organs of different species at different phenological stages. The results showed that in the same tree species, the relative content of WSC of all organ litters continued to decline. The relative content of OSC increased at the leaf maturing stage but decreased at the leaf falling stage over the entire year. Few changes were observed in the content of ASE from litters under the different phenological stages, while the relative content of AIR increased. At the same time, the lignocellulose index (LCI) of leaf litter and twig litter showed increasing tendency, but the LCI of fruit litter continued to show a decreasing tendency over the entire year. For the same phenological stage, the relative content of WSC in the litter of C. acuminata was higher in comparison with that in other tree species, and the relative content of AIR was higher in conifer species than in broad-leaved species. Compared with other periods, higher relative content of WSC and OSC in leaf litter was detected at the leaf maturing stage, and higher relative content of OSC in twig litter was observed at the leaf maturing stage. The twig litter at the leaf budding and leaf maturing stages showed relatively high ASE content, but low AIR content and LCI. These results show that the key stages, species types, organ types, and their interactions significantly affected the relative content of WSC, OSC, ASE and AIR in litter, enriching our understanding of the characteristics of ecosystem carbon return.

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更新日期/Last Update: 2019-02-25