Effects of Permafrost Activity on Growth and Undergrowth of Larch in The Greater Hinggan Mountains

doi:10.13466/j.cnki.lyzygl.2021.03.021

Abstract

Abstract:

Based on two years' field survey data,the DBH growth rate of larch in different permafrost layers in the Greater Hinggan Mountains,Inner Mongolia and the variation characteristics of biodiversity index under larch forest were analyzed.The results showed as follows:1) With the increase of active layer,the DBH growth rate of Larix Xing'an was higher in the relatively deep permafrost area,and was lower in the frozen area than in the non-frozen area;2) With the increase of the active layer,the Shannon diversity index and richness index of the active layer samples in the permafrost region increased,which were lower than those in the non-permafrost region.The contents of organic matter,total nitrogen and total phosphorus in soil showed an increasing trend,while the contents of total potassium showed a decreasing trend compared with those in non-frozen soil area.3) The results of RDA analysis showed that among the permafrost soil factors,the surface temperature and active layer thickness significantly affected the DBH growth rate and understory plant species diversity of Larix Xing'an.

Key words: Larix Xing'an forest, active permafrost layer, soil nutrients, species diversity, permafrost

CLC Number:

ZHANG Yang, TIE Niu, CHANG Xiaoli. Effects of Permafrost Activity on Growth and Undergrowth of Larch in The Greater Hinggan Mountains[J]. FOREST RESOURCES WANAGEMENT, 2021, (3): 137-144.

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References 24

[1]	Walker D A, Jia G J, Epstein H E, et al. Vegetation-soilthaw-depth relationships along a low-arctic bioclimate gradient,Alaska:synjournal of information from the ATLAS studies[J]. Permafrost Periglacial Process, 2003, 14:103-123. doi: 10.1002/(ISSN)1099-1530
[2]	McGuire A D, Wirth C, Apps M, et al. Environmental variation,vegetation distribution,carbon dynamics and water/energy exchange at high latitudes[J]. Journal of Vegetation Science, 2002, 13(3):313-314.
[3]	Christensen T R, Johansson T, Akerman H J, et al. Thawing sub‐arctic permafrost:Effects on vegetation and methane emissions[J]. Journal of Geophysical Research Letters, 2004, 31(4):1-4.
[4]	谭俊, 李秀华. 气候变暖影响大兴安岭冻土退化和兴安落叶松北移的探讨[J]. 内蒙古林业调查设计, 1995(1):25-31.
[5]	孙菊, 李秀珍, 胡远满, 等. 大兴安岭沟谷冻土湿地植物群落分类、物种多样性和物种分布梯度[J]. 应用生态学报, 2009, 20(9):2049-2056.
[6]	GB/T 26424—2010,森林资源规划设计调查技术规程[S].
[7]	54NY/T 1121.6—2006,中华人民共和国农业行业标准土壤有机质的测定[S].
[8]	55NY/T 1121.24—2012,中华人民共和国农业行业标准土壤全氮的测定[S].
[9]	56GB9837—88,中华人民共和国国家标准土壤全磷测定法[S].
[10]	57GB9836—88,中华人民共和国国家标准土壤全钾测定法[S].
[11]	常晓丽, 金会军, 何瑞霞, 等. 大兴安岭北部多年冻土监测进展[J]. 冰川土, 2013, 35(1):93-100.
[12]	Rustad L, Campbell J, Marion G, et al. A meta-analysis of the response of soil respiration,net nitrogen mineralization,and aboveground plant growth to experimental ecosystem warming[J]. Oecologia, 2001, 126(4):543-562. doi: 10.1007/s004420000544 pmid: 28547240
[13]	Mcguire A D, Macdonald R W, Schuur E A G, et al. The car-bon budget of the northern cryosphere region[J]. Environ-mental Sustainability, 2010, 2:1-6.
[14]	Feng X J, Leah L, Simpson M J, et al. Responses of soil organic matter and microorganisms to freeze-thaw cycles[J]. Soil Biology and Biochemistry, 2007, 39:2027-2037 doi: 10.1016/j.soilbio.2007.03.003
[15]	Fitzhugh R D, Driscoll C T, Groffman P M, et al. Effects of soil freezing disturbance on soil solution nitrogen,phosphorus,and carbon chemistry in a northern hardwood ecosystem[J]. Biogeochemistry, 2001, 56(2):215-238. doi: 10.1023/A:1013076609950
[16]	Summerield R J. Substrate freezing and thawing as a factor in the mineral nutrient status of mire ecosystens[J]. Plant and Soil, 1973, 38:557-566 doi: 10.1007/BF00010695
[17]	周幼吾, 郭东信, 邱国庆, 等. 中国冻土[M]. 北京: 科学出版社, 2000.
[18]	祁英. 兴安落叶松老头林的特征和经营管理方向的探讨[J]. 内蒙古林业调查设计, 1999(1):22-24.
[19]	尤鑫. 大兴安岭草类落叶松林冻土融化期土壤水分动态变化规律研究[D]. 呼和浩特:内蒙古农业大学, 2006.
[20]	李英年, 关定国, 赵亮, 等. 海北高寒草甸的季节冻土及在植被生产力形成过程中的作用[J]. 冰川冻土, 2005(3):311-318.
[21]	郭金停, 韩风林, 布仁仓, 等. 大兴安岭北坡多年冻土区植物群落分类及其物种多样性对冻土融深变化的响应[J]. 生态学报, 2016, 36(21):6834-6841.
[22]	张齐兵. 大兴安岭北部植被对高胁迫冻土环境及干扰的响应[J]. 冰川冻土, 1994(2):97-103.
[23]	崔宁洁, 张丹桔, 刘洋, 等. 不同林龄马尾松人工林林下植物多样性与土壤理化性质[J]. 生态学杂志, 2014, 33(10):2610-2617.
[24]	Bloor J M G, Bardgett R D. Stability of above-ground and below-ground processes to extreme drought in model grass-land ecosystems:Interactions with plant species diversity and soil nitrogen availability[J]. Perspect Plant Ecol.,Evol and Syst., 2012, 14(3):193-204. doi: 10.1016/j.ppees.2011.12.001

样地编号	坡度 /(°)	坡向	坡位	海拔 /m	冻土活动层厚度/m
对照样地	3	北坡	下坡	817	无冻土
1~3	2	北坡	下坡	813	0.5
4~6	4	北坡	下坡	815	0.8
7~9	3	北坡	下坡	809	1.9

钻孔编号	总深度 /m	测温深度/m
1	6.6	0,0.1,0.4,0.5,0.8,0.6,3.2,4.0,5.0,6.0,6.6
2	5.5	0,0.1,0.4,0.5,0.8,0.6,3.2,4.0,5.0
3	6.3	1.7,1.9,2.3,2.7,3.1,3.5,4.0,4.5,5.0,5.5,6.3

冻土活动层厚度/m	有机质/(g/kg)	全氮/(g/kg)	全磷/(g/kg)	全钾/(g/kg)
0.5	180.82±37.08c	10.61±0.39b	0.81±0.76c	19.13±1.55a
0.8	270.97±8.60b	11.91±2.21b	1.77±0.23b	7.60±2.30b
1.9	337.03±3.79a	20.86±0.92a	1.96±0.12b	7.25±0.62b
非冻土区	323.84±7.76a	22.18±0.88a	3.29±0.48a	5.25±0.97c

冻土环境因子	解释变异量	P
冻土活动层厚度PMD	96.6	0.002
冻土活动层处地温TEM	80.6	0.002
全磷TP	4.2	0.524
有机质OM	3.7	0.540
全氮TN	3.1	0.606
全钾TK	0.6	0.886