Study on Carbon Sink Function of Road Area of Typical Grassland Under Different Restoration Years in Inner Mongolia

doi:10.13304/j.nykjdb.2022.0322

Abstract

Abstract:

In order to explore the characteristics of carbon sink function restoration of ecosystems in the process of highway construction in grassland areas，taking the road ecosystem in Xilingol typical grassland area as the research object，the characteristics of carbon sink function among 4 typical disturbance modes （roller compaction，embankment，cutting and borrow site） of road ecosystem in typical grassland area under different vegetation restoration years （1，5 and 15 a） were compared based on field measurements and space instead of time method. The results showed that， with the increase of restoration years，the vegetation community characteristics indicators increased significantly under different disturbance methods. Vegetation organic carbon content，soil organic carbon content and restoration period showed positive correlation，and showed restoration 15 a > restoration 5 a > restoration 1 a. The maximum value occurred when the restoration period was 15 a and the embankment vegetation carbon content was 143.65 g·kg^-1 and the embankment soil carbon content was 14.33 g·kg^-1. Under different restoration years，the order of organic carbon content in the four disturbed plots from high to low was embankment > cutting > fetch ground > rolling. The organic carbon content of the road embankment was higher than the other three samples at all three restoration years， and exceeded the native control by 21.6% at restoration 15 a. The results were of great significance for road ecosystem restoration and carbon sequestration function evaluation.

Key words: highway area, carbon sink, organic carbon content, ecological restoration

摘要：

为探究草原地区公路建设过程中生态系统碳汇功能恢复特征，以锡林郭勒典型草原区路域生态系统为研究对象，以野外实测数据结合空间代替时间法，对比分析典型草原区不同植被恢复年限下（1、5、15 a）路域生态系统4种典型扰动方式（碾压、路堤、路堑、取土场）的固碳功能特征。结果表明，随着恢复年限的增加，不同扰动方式下植被群落特征指标均显著上升。植被有机碳含量、土壤有机碳含量与恢复年限均呈正相关关系，表现为恢复15 a>恢复5 a>恢复1 a。最大值出现在恢复15 a时，路堤植被碳含量达到了143.65 g·kg^-1，路堤土壤碳含量为14.33 g·kg^-1。不同恢复年限下，4种扰动方式样地生态系统有机碳含量由高到低均表现为路堤>路堑>取土场>碾压。路堤在3种恢复年限下生态系统有机碳含量均高于其他3种样地，并且在恢复15 a时超过了原生对照21.6%。研究结果对路域生态系统修复及碳汇功能评价具有重要意义。

关键词: 公路路域, 碳汇, 有机碳含量, 生态恢复

CLC Number:

X734

Na CHA, Baohe LIU, Zhen ZHANG, Long LI, Yanjiao WANG, Liguo WANG, Feifei SU. Study on Carbon Sink Function of Road Area of Typical Grassland Under Different Restoration Years in Inner Mongolia[J]. Journal of Agricultural Science and Technology, 2023, 25(9): 207-216.

茶娜, 刘宝河, 张朕, 李龙, 王嫣娇, 王立国, 苏非非. 不同恢复年限下典型草原区路域生态系统固碳功能研究[J]. 中国农业科技导报, 2023, 25(9): 207-216.

Figures/Tables 8

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路段名称Section name	起始位置 Starting position	终止位置 End position	恢复年限Recovery period/a	扰动方式Disturbance mode	样方数量Number of sample plots	海拔Altitude/m	坡度 Slope/（°）	植被盖度Vegetation coverage/％
G303-A	锡林浩特 Xilinhot	阿巴嘎旗 Abaga Banner	1	碾压Rolling	4	1 023	4.23	5~10
				路堤Embankment	5	1 027	37.52	20~35
				取土场Borrow area	4	1 098	24.60	10~15
				路堑Cutting	5	1 103	38.90	15~25
G207-X	锡林浩特 Xilinhot	西乌珠穆沁旗 Xiwuzhumuqin Banner	5	碾压Rolling	5	1 046	12.53	5~12
				路堤Embankment	5	1 103	41.20	35~45
				取土场Borrow area	4	1 037	16.11	10~18
				路堑Cutting	4	1 125	30.36	20~30
G207-W	锡林浩特 Xilinhot	乌日图塔拉 Wuritutala	15	碾压Rolling	4	1 070	8.85	10~15
				路堤Embankment	5	1 065	32.12	50~60
				取土场Borrow area	4	1 044	24.60	30~40
				路堑Cutting	5	1 119	36.37	35~45
				CK	5	1 093	9.10	45~90

路段名称Section name	起始位置 Starting position	终止位置 End position	恢复年限Recovery period/a	扰动方式Disturbance mode	样方数量Number of sample plots	海拔Altitude/m	坡度 Slope/（°）	植被盖度Vegetation coverage/％
G303-A	锡林浩特 Xilinhot	阿巴嘎旗 Abaga Banner	1	碾压Rolling	4	1 023	4.23	5~10
				路堤Embankment	5	1 027	37.52	20~35
				取土场Borrow area	4	1 098	24.60	10~15
				路堑Cutting	5	1 103	38.90	15~25
G207-X	锡林浩特 Xilinhot	西乌珠穆沁旗 Xiwuzhumuqin Banner	5	碾压Rolling	5	1 046	12.53	5~12
				路堤Embankment	5	1 103	41.20	35~45
				取土场Borrow area	4	1 037	16.11	10~18
				路堑Cutting	4	1 125	30.36	20~30
G207-W	锡林浩特 Xilinhot	乌日图塔拉 Wuritutala	15	碾压Rolling	4	1 070	8.85	10~15
				路堤Embankment	5	1 065	32.12	50~60
				取土场Borrow area	4	1 044	24.60	30~40
				路堑Cutting	5	1 119	36.37	35~45
				CK	5	1 093	9.10	45~90

植物种类Plant species	重要值Important value
植物种类Plant species	1 a	5 a	15 a	CK
猪毛蒿Artemisia scoparia Waldst. et Kit.		0.371 3		0.201 5
栉叶蒿Neopallasia pectinata （Pall.） Poljak.			0.834 2	0.109 0
野大麻Cannabis sativa L.			0.176 0	0.078 5
羊草Leymus chinensis （Trin.ex Bunge） Tzvelev	0.607 3	0.434 3	0.769 9	0.400 7
小叶锦鸡儿Caragana microphylla Lam			0.072 5	0.026 0
细叶马莲Iris lactea Pall.				0.039 4
委陵菜Potentilla chinensis Ser.		0.033 1		0.021 2
菟丝子Cuscuta chinensis Lam.			0.018 9	0.106 4
酸模叶蓼Persicaria lapathifolia （L.） Delarbre			0.013 1
蒲公英Taraxacum mongolicum Hand.-Mazz.		0.052 7		0.020 3
苜蓿Medicago sativa L.			0.104 3	0.038 7
冷蒿Artemisia frigida Willd		0.332 2		0.074 5
胡枝子Lespedeza bicolor Turcz.	0.123 7
鹤虱Lappula myosotis Moench		0.034 4	0.038 8	0.016 9
褐沙蒿Artemisia halodendron
大籽蒿Artemisia sieversiana Ehrhart ex Willd.	0.898 6	0.296 4	0.638 0	0.044 4
苁蓉Cistanche deserticola Ma			0.052 2	0.020 8
刺儿菜Cirsium arvense var. integrifolium				0.022 2
车前Plantago asiatica L.		0.015 6		0.031 0
糙引子草Cleistogenes squarrosa （Trin.） Keng	1.078 2			0.100 2
冰草Agropyron cristatum （L.） Gaertn. （Gramineae）		0.418 0	0.295 2	0.055 6
物种数量Number of species	4	9	11	18

植物种类Plant species	重要值Important value
植物种类Plant species	1 a	5 a	15 a	CK
猪毛蒿Artemisia scoparia Waldst. et Kit.		0.371 3		0.201 5
栉叶蒿Neopallasia pectinata （Pall.） Poljak.			0.834 2	0.109 0
野大麻Cannabis sativa L.			0.176 0	0.078 5
羊草Leymus chinensis （Trin.ex Bunge） Tzvelev	0.607 3	0.434 3	0.769 9	0.400 7
小叶锦鸡儿Caragana microphylla Lam			0.072 5	0.026 0
细叶马莲Iris lactea Pall.				0.039 4
委陵菜Potentilla chinensis Ser.		0.033 1		0.021 2
菟丝子Cuscuta chinensis Lam.			0.018 9	0.106 4
酸模叶蓼Persicaria lapathifolia （L.） Delarbre			0.013 1
蒲公英Taraxacum mongolicum Hand.-Mazz.		0.052 7		0.020 3
苜蓿Medicago sativa L.			0.104 3	0.038 7
冷蒿Artemisia frigida Willd		0.332 2		0.074 5
胡枝子Lespedeza bicolor Turcz.	0.123 7
鹤虱Lappula myosotis Moench		0.034 4	0.038 8	0.016 9
褐沙蒿Artemisia halodendron
大籽蒿Artemisia sieversiana Ehrhart ex Willd.	0.898 6	0.296 4	0.638 0	0.044 4
苁蓉Cistanche deserticola Ma			0.052 2	0.020 8
刺儿菜Cirsium arvense var. integrifolium				0.022 2
车前Plantago asiatica L.		0.015 6		0.031 0
糙引子草Cleistogenes squarrosa （Trin.） Keng	1.078 2			0.100 2
冰草Agropyron cristatum （L.） Gaertn. （Gramineae）		0.418 0	0.295 2	0.055 6
物种数量Number of species	4	9	11	18

恢复年限 Recovery period/a	Simpsom优势度指数 D	Shannon-Wiener多样性指数 H	Margale丰富度指数 M	Pielon均匀度指数 E
1	0.209±0.021 c	0.340±0.011 c	0.347±0.032 c	0.491±0.015 c
5	0.339±0.030 c	0.654±0.025 b	0.592±0.017 b	0.573±0.009 b
15	0.413±0.033 b	0.900±0.019 a	0.700±0.021 a	0.670±0.028 a
CK	0.542±0.012 a	0.947±0.040 a	0.691±0.064 a	0.683±0.036 a