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[1]杨婷惠,祁凯斌,黄俊胜,等.林窗式疏伐对云杉人工林土壤持水性能的影响[J].应用与环境生物学报,2018,24(05):1171-1178.[doi:10.19675/j.cnki.1006-687x.2017.12011]
 YANG Tinghui,QI Kaibin,et al.Effects of different sizes of simulated gaps on the soil water-holding capacity of a Picea asperata plantation[J].Chinese Journal of Applied & Environmental Biology,2018,24(05):1171-1178.[doi:10.19675/j.cnki.1006-687x.2017.12011]
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林窗式疏伐对云杉人工林土壤持水性能的影响()
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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05期
页码:
1171-1178
栏目:
研究论文
出版日期:
2018-10-25

文章信息/Info

Title:
Effects of different sizes of simulated gaps on the soil water-holding capacity of a Picea asperata plantation
作者:
杨婷惠祁凯斌黄俊胜包维楷庞学勇
中国科学院山地生态恢复与生物资源利用重点实验室,生态恢复与生物多样性保育四川省重点实验室,中国科学院成都生物所 成都 610041 2中国科学院大学 北京 100049
Author(s):
YANG Tinghui1 2 QI Kaibin1 2 HUANG Junsheng1 2 BAO Weikai1 & PANG Xueyong1**
1 CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, and Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China 2 University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
云杉人工林林窗式疏伐土壤持水性能土壤物理结构生态恢复
Keywords:
spruce plantation gap-model thinning soil water-holding capacity soil physical structure ecological restoration
分类号:
S714.7
DOI:
10.19675/j.cnki.1006-687x.2017.12011
摘要:
选择川西亚高山云杉人工林,模拟自然林窗形成,布置扩展面积分别为小(74 m2)、中(109 m2)、大(196 m2)3个等级的林窗,探索不同疏伐强度对土壤结构及持水性能的影响,并结合细根生物量、土壤有机质含量等参数,试图揭示导致林窗式疏伐后土壤结构及持水性能差异的因素. 结果表明,疏伐初期(1年),林窗的形成对表层(0-10 cm)土壤的孔隙状况及持水性能没有显著影响;随着时间的演替,各处理土壤结构及持水性能均得到不同程度的改善. 疏伐后8年,小林窗、中林窗和大林窗表层土壤的容重较对照分别低17.91%、7.33%和9.24%,其总孔隙度较对照分别高7.16%、2.81%和3.65%,其非毛管孔隙度较对照分别高32.89%、8.16%和15.79%,但不同强度疏伐对土壤持水性能的影响不显著. 细根生物量、土壤有机质含量和水占孔隙比是影响土壤物理结构及持水性能的主要因素. 上述结果表明随着林窗式疏伐抚育进程的推进,小林窗能显著改善表层土壤结构,但对土壤持水性能方面的影响不显著. (图1 表5 参56)
Abstract:
This study investigated how gap-model thinning affects soil water-holding capacity, and which factors mediate this influence. To achieve this goal, we applied thinning by simulating gap formation (using four gap sizes of 0, 74, 109, and 196 m2) in a spruce (Picea asperata) plantation in western Sichuan, China. We further analyzed how the fine root biomass and soil organic matter content affected the effects of gap-model thinning on the physical structure and water-holding capacity of the soil. Results showed that in the first year after thinning there were only minor responses of surface soil bulk density, porosity, and water-holding capacity to gap-model thinning. However, as the thinning treatment continued, the soil structure and water-holding capacity continued to improve. Compared to the control, the bulk density of the surface soil decreased by 17.91% in the small gap treatment, 7.33% in the medium gap treatment, and 9.24% in the large gap treatment after eight years of thinning. The total porosity of the surface soil increased by 7.16% in the small gap treatment relative to the control, 2.81% in the medium gap treatment, and 3.65% in the large gap treatment. Additionally, the non-capillary porosity of the surface soil increased by 32.89% in the small gap treatment compared to the control, 8.16% in the medium gap treatment, and 15.79% in the large gap treatment. However, eight years of thinning did not significantly affect the soil water-holding capacity. Correlation analysis showed that the fine root biomass, soil organic carbon content, and water ratio in soil pores were the main factors affecting the soil physical structure and water-holding capacity. Overall, our results showed that the small gap treatment significantly improved the surface soil structure, but had no significant effects on the soil water-holding capacity.

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更新日期/Last Update: 2018-10-25