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[1]何 聪 任 颖 麦淑媛 袁 吉 游成铭 王旭熙 吴福忠**.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,2018,24(06):1-10.[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,2018,24(06):1-10.[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:
24卷
期数:
2018年06期
页码:
1-10
栏目:
研究论文
出版日期:
2018-12-25

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 *
文章编号:
201804002
作者:
何 聪1 任 颖 1 麦淑媛 1 袁 吉 1 游成铭 1 王旭熙2 吴福忠1**
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**
1Forestry 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 stages litter organic components
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,了解组分含量在物候期的变化有助于进一步丰富对生态系统碳的归还等特征的认识。因此,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)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LCI指数表现出上升的趋势,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指数。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。研究结果进一步丰富了对生态系统碳的归还等特征的认识。(图4 表1 参42)
Abstract:
The character istics of organic components in litter play important roles in litter decomposition and other material cycling processes in ecosystems, but the contents of organic components in litter would be controlled by leaf phenological rhythms. Therefore, a field investigation was carried out in the Rainy Area of West China. The reprensented tree species ( Camptotheca acuminate, 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 as leaf budding, leaf expanding, leaf maturing and leaf falling. W ater soluble component (WSC), organic solvent soluble component (OSC), acid-soluble extractive (ASE), acid-insoluble residue (AIR) contents were analysed in different falled organs of dif ferent species at different phenological stages. The results showed that i n the same tree species, the relative content of WSC of all organ litters continued to decline, the relative content of OSC increased at leaf maturing stage but decreased at leaf falling stage in the whole year, f ew changes in the content of ASE from litters were observed under the different phenological stages,while the relative content of AIR increased, at the same time, lignocellulose index (LCI) of leaf litter and twig litter showed in creasing tendency but LCI of fruit litter kept a continue decreasing tendency in the whole year. For the same phenological stage, the relative content of WSC in litter of Camptotheca acuminata was more higher in comparison with that in other tree species, and the relative content of AIR is higher in conifer species than that in broad-leaved species. Compared with other periods, the higher relative contents of WSC and OSC in leaf litter were detected at leaf maturing stage, and the higher relative content of OSC in twig litter was observed at leaf maturing stage. The twig litter at leaf budding stage and leaf maturing stage showed higher ASE content, but lower AIR content and LCI. The result fully shows that key stages, species types, organ types and their interactions significantly affected the relative contents of WSC, OSC, ASE and AIR in litter, which enrich the understanding of the characteristics of ecosystem carbon return.

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备注/Memo

备注/Memo:
收稿日期: 2018-04-03 接受日期: 2018-05-18
*国家重点研发计划(2017YFC0505003)、国家自然科学基金项目(31670526和31622018)、四川省青年科技创新团队(2017TD0022)和四川农业大学科研兴趣培养项目(2018169)资助?
**通讯作者(E-mail:wufzchina@163.com)
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更新日期/Last Update: 2018-06-05