Early effect of target tree management on carbon storage in Pinus massoniana plantations

doi:10.3969/j.issn.1000-2006.201905006

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (2): 206-214.doi: 10.3969/j.issn.1000-2006.201905006

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Early effect of target tree management on carbon storage in Pinus massoniana plantations

LUO Yan¹(), HE Pengjun², LYU Qian¹, FAN Chuan¹^,³^,⁴, FENG Maosong¹^,³^,⁴, LI Xianwei¹^,³^,⁴^,^*(), CHEN Luman¹

1. College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
2. Chongqing Tongnan District Forestry Bureau, Tongnan 402660,China
3. Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu 611130, China
4. Key Laboratory of National Forestry and Grassland Administration on Forest Resources Conservation and Ecological Security in the Upper Reaches of Yangtze River, Chengdu 611130, China

Received:2019-05-06 Revised:2019-11-13 Online:2020-03-30 Published:2020-04-01
Contact: LI Xianwei E-mail:949652314@qq.com;lxw@sicau.edu.cn

Abstract

Abstract:

【Objective】 Increasing atmospheric greenhouse gas concentrations have led to an increase in the attention toward the causes and effects of global warming. Protecting existing plantation carbon storage and carrying out scientific forest management activities have become important measures to improve the structure of forest stands and enhance terrestrial carbon sinks. 【Method】 A 33-year-old Pinus massoniana plantation in Huaying City, eastern Sichuan, China, was used to analyze the variations of Pinus massoniana carbon storage on the basis of target tree density. 【Result】 We adopted a target tree density of 100 (H1), 150 (H2) and 200 (H3) plants/hm² for our study. The results showed that, compared with the control forest (HCK), the storage changes of the arbor layer (organs) and the understory of the target tree were significantly different (P < 0.05) but that there was no significant difference in soil layer carbon storage between different treatments ( P > 0.05). The carbon storage growth of the arbor layer was 15.65%, 18.70% and 16.59% for H1, H2 and H3, respectively, which was higher than 13.4% for HCK. The average carbon storage growth of stem, branch, leaf, root and whole tree in the target tree were higher than 66.04%, 51.25%, 52.09%, 48.81% and 38.67% for HCK; these values higher than that of ordinary trees. The range of carbon storage in each organ was trunk > root > branch > leaf. The carbon storage in the herb layer was H2>H3>H1>HCK, and the rest of them were H3>H2>H1>HCK. Carbon storage of the soil layer was 244.86 t/hm ² and accounted for 76.44% of the total carbon storage in the plantation, but the carbon storage in the soil surface (0-5 cm) accounted for 45.52% of the soil layer (0-40 cm). A trend of significant reduction in carbon storage was observed with an increase in soil depth. The spatial distribution of the carbon pool of Pinus massoniana plantation was soil layer (0-40 cm) > arbor layer > shrub layer > herb layer > litter layer > crude wood residue layer.【Conclusion】 Target tree management can increase the carbon storage of Pinus massoniana plantations, and the carbon storage in Pinus massoniana plantations with a density of 150 target trees per hectare was the highest.

Key words: target tree management, carbon storage, Pinus massoniana plantation, ecosystem, arbor layer, soil layer, understory layer

CLC Number:

S753.7

LUO Yan, HE Pengjun, LYU Qian, FAN Chuan, FENG Maosong, LI Xianwei, CHEN Luman. Early effect of target tree management on carbon storage in Pinus massoniana plantations[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(2): 206-214.

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目标树标准地 target tree standard	目标树密度/ (株·hm^-2) target tree number	目标树之间距离/m distance between target trees	林分平均胸径/cm stand average breast diameter		林分平均树高/m stand average tree height		经纬度 latitude and longitude	海拔/m altitude	坡度/ (°) slope	坡向 slope aspect
目标树标准地 target tree standard	目标树密度/ (株·hm^-2) target tree number	目标树之间距离/m distance between target trees	处理当年 processing year	处理3 年后 3 years after treatment	处理当年 processing year	处理3 年后 3 years after treatment	经纬度 latitude and longitude	海拔/m altitude	坡度/ (°) slope	坡向 slope aspect
H1	100	10×10	19.44±0.4	20.21±0.3	10.50±0.4	11.24±0.3	106°47'4″E 30°20'29″N	500	17	NW
H2	150	8.5×8.5	19.87±0.3	20.70±0.2	12.00±0.5	12.73±0.4	106°47'3″E 30°20'29″N	499	18	NW
H3	200	7×7	19.72±0.2	20.63±0.3	11.05±0.3	11.66±0.4	106°47'8″E 30°20'28″N	520	20	NW
HCK	-	-	19.85±0.4	20.40±0.5	10.05±0.4	10.68±0.3	106°47'30″E 30°20'29″N	493	17	NW

林木类型 forest types	处理 treatments	树干 stem	树枝 branch	树叶 leaf	根系 root	全株 whole tree
一般树 ordinary tree	HCK	4.44±0.21 d	0.41±0.04 d	0.12±0.06 e	1.35±0.08 cd	7.54±0.47 g
	H1	5.09±0.36 c	0.63±0.03 cd	0.15±0.06 de	1.54±0.07 d	8.63±0.31 f
	H2	5.45±0.44 c	0.75±0.06 c	0.26±0.06 d	1.67±0.09 c	9.24±0.66 e
	H3	5.13±0.32 c	0.68±0.03 cd	0.17±0.06 de	1.57±0.09 cd	8.77±0.54 f
目标树 target tree	HCK	6.21±0.41 b	0.96±0.09 bc	0.37±0.04 b	2.62±0.10 b	11.17±0.78 d
	H1	9.04±0.18 a	1.23±0.04 b	0.32±0.02 c	2.88±0.06 b	13.59±0.52 c
	H2	9.30±0.31 a	1.47±0.08 a	0.45±0.03 ab	3.30±0.12 a	15.79±0.66 b
	H3	9.67±0.55 a	1.55±0.13 a	0.53±0.04 a	3.43±0.14 a	16.45±0.82 a

处理年份 year of treatment	处理 treatment	碳贮量/(t·hm^-1)carbon storage
处理年份 year of treatment	处理 treatment	一般树 ordinary tree	目标树 target tree	干扰树 interference tree	总贮量 total
处理当年 processing year	HCK	76.628 526 71	10.901 418 620	-	87.529 945 33
	H1	68.913 683 30	7.108 503 062	8.320 2	84.342 386 37
	H2	71.658 949 87	10.820 881 300	8.975 1	91.454 931 17
	H3	64.266 352 29	14.857 895 410	8.697 0	87.821 247 70
处理后3年 3 years after treatment	HCK	86.470 313 26	12.813 694 120	-	99.284 007 38
	H1	79.407 614 14	8.511 619 305	-	87.919 233 45
	H2	84.678 466 15	13.222 748 800	-	97.901 214 95
	H3	74.073 591 49	18.179 587 400	-	92.253 178 89

处理 treatment	处理时间 time of treatment	灌木层 shrubs layer	草本层 herbs layer	枯枝落叶层 litter layer	粗木质残体层 CWR layer
HCK	处理当年processing year	1.63±0.12 E	0.43±0.04 E	0.62±0.02 G	0.19±0.01 EF
	处理3年后 3 years after treatment	2.37±0.09 D	0.76±0.02 D	0.86±0.02 D	0.26±0.01 D
	变化量change quantity	0.74±0.06 d	0.33±0.02 d	0.24±0.02 d	0.07±0.01 d
H1	处理当年processing year	1.48±0.07 F	0.37±0.02 EF	0.74±0.02 E	0.21±0.02 E
	处理3年后 3 years after treatment	2.75±0.10 BC	1.21±0.04 C	1.05±0.01 B	0.54±0.02 C
	变化量change quantity	1.27±0.03 c	0.84±0.02 c	0.31±0.01 c	0.33±0.01 c
H2	处理当年processing year	1.51±0.10 F	0.45±0.04 E	0.57±0.02 H	0.17±0.01 F
	处理3年后 3 years after treatment	2.81±0.09 B	1.82±0.07 A	0.94±0.03 C	0.67±0.02 B
	变化量change quantity	1.30±0.07 b	1.37±0.04 a	0.37±0.01 b	0.50±0.01 b
H3	处理当年processing year	1.62±0.11 E	0.41±0.03 E	0.67±0.01 F	0.21±0.02 E
	处理3年后 3 years after treatment	2.96±0.12 A	1.61±0.12 B	1.22±0.04 A	0.90±0.01 A
	变化量change quantity	1.34±0.09 a	1.20±0.04 b	0.65±0.02 a	0.69±0.02 a

土层/cm soil layer	处理当年 processing year				处理3年后 3 years after treatment
土层/cm soil layer	HCK	H1	H2	H3	HCK	H1	H2	H3
0~5	27.94±0.56 abc	28.35±0.55 abc	28.01±1.18 abc	29.07±0.20 a	28.53±0.20 ab	27.67±0.34 bc	27.17±1.34 c	28.1±0.68 abc
≥5~20	22.48±0.29 def	21.92±0.85 ef	22.07±0.80 ef	23.69±0.83 d	22.84±0.65 de	21.45±0.50 f	21.42±0.59 f	23.19±0.34 de
≥20~40	10.22±0.11 i	11.77±0.19 gh	12.14±0.31 g	11.04±0.65 ghi	10.46±0.18 i	11.45±0.68 ghi	11.89±0.78 gh	10.69±0.51 hi

Early effect of target tree management on carbon storage in Pinus massoniana plantations

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组分 component	碳贮量/ (t·hm^-2) carbon storage	碳贮量百分比/% percentage of carbon storage
乔木层arbor layer	52.73	16.46
灌木层shrub layer	10.89	3.40
草本层herb layer	5.40	1.69
枯枝落叶层orest floor	4.07	1.27
粗木质残体层 crude wood residue layer	2.37	0.74
土壤层(0~40 cm) soil layer	244.86	76.44
合计total	320.32	100.00

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