FOREST RESOURCES WANAGEMENT ›› 2022›› Issue (4): 80-88.doi: 10.13466/j.cnki.lyzygl.2022.04.011
• Scientific Research • Previous Articles Next Articles
HU Jiayi1,2(), WANG Ruihui1,2(), LIU Kaili1,2, ZHANG Bin1,2, ZHOU Yuhuai1,2, LI Xuehui1,2, GONG Yingyun1,2
Received:
2022-05-05
Revised:
2022-05-24
Online:
2022-08-28
Published:
2022-10-13
Contact:
WANG Ruihui
E-mail:453797384@qq.com;wang626389@163.com
CLC Number:
HU Jiayi, WANG Ruihui, LIU Kaili, ZHANG Bin, ZHOU Yuhuai, LI Xuehui, GONG Yingyun. Effects of Thinning on Ecological Benefits of Cryptomeria fortunei Plantations in High Altitude Area of Western Sichuan[J]. FOREST RESOURCES WANAGEMENT, 2022, (4): 80-88.
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URL: https://www.lyzygl.com.cn/EN/10.13466/j.cnki.lyzygl.2022.04.011
Tab.1
Basic condition of sample plots
处理 | 样地号 | 间伐强度/% | 海拔/m | 坡度/(°) | 坡向 | 平均胸径/cm | 平均树高/m | 保留密度/(株/hm2) | |
---|---|---|---|---|---|---|---|---|---|
CK | CK-1 | 0 | 1501 | 18 | 东偏南 | 12.8 | 7.8 | 2709 | |
CK-2 | 1490 | 19 | 东偏南 | 12.5 | 7.6 | 2783 | |||
CK-3 | 1500 | 16 | 东偏南 | 13.0 | 7.9 | 2707 | |||
T1 | T1-1 | 20 | 1569 | 15 | 东 | 13.5 | 8.5 | 2153 | |
T1-2 | 1550 | 17 | 东 | 13.5 | 8.2 | 2118 | |||
T1-3 | 1548 | 13 | 东 | 14.4 | 7.8 | 2197 | |||
T2 | T2-1 | 35 | 1556 | 15 | 东 | 14.6 | 8.1 | 1732 | |
T2-2 | 1552 | 12 | 东 | 14.4 | 8.5 | 1699 | |||
T2-3 | 1542 | 15 | 东 | 13.9 | 8.2 | 1734 | |||
T3 | T3-1 | 50 | 1549 | 17 | 东 | 15.3 | 8.2 | 1400 | |
T3-2 | 1560 | 16 | 东 | 15.3 | 8.3 | 1426 | |||
T3-3 | 1545 | 17 | 东 | 14.9 | 8.4 | 1359 |
Tab.7
Growth changes in stand characteristics between 2015 and 2020
处理 | 胸径/cm | 树高/m | 单株材积/m3 | 蓄积量/(m3/hm2) |
---|---|---|---|---|
CK | 2.28±0.28d | 3.64±0.60d | 0.0526±0.0153d | 8.6±0.23b |
T1 | 5.13±0.90c | 4.80±2.13c | 0.1346±0.0843c | 17.3±1.08a |
T2 | 6.90±0.29b | 5.60±1.66a | 0.1768±0.0600b | 18.1±1.35a |
T3 | 7.52±0.72a | 5.12±1.11b | 0.2015±0.0785a | 16.9±0.40a |
Tab.9
Variation of understory vegetation diversity index between 2015 and 2020
处理 | 物种丰富度指数 | Shannon-Wiener多样性指数 | Simpson生态优势度指数 | Pielou均匀度指数 |
---|---|---|---|---|
CK | 1.33±0.58c | 0.49±0.20b | 0.10±0.02c | 0.23±0.09b |
T1 | 4.33±0.58b | 0.86±0.15ab | 0.23±0.05b | 0.29±0.10ab |
T2 | 5.67±1.53ab | 0.97±0.25a | 0.21±0.06bc | 0.26±0.10b |
T3 | 6.33±0.58a | 1.27±0.22a | 0.39±0.10a | 0.48±0.13a |
Tab.11
Variation of soil physicochemical properties between 2015 and 2020
处理 | 水解氮含量/(g/kg) | 有效磷含量/(g/kg) | 速效钾含量/(mg/kg) | 容重/(g/cm3) | 最大持水率/% | 总孔隙度/% |
---|---|---|---|---|---|---|
CK | 0.03±0.05c | 0.15±0.04a | 2.5±1.1bc | -0.14±0.04a | 1.70±2.61b | 3.91±0.76b |
T1 | 0.23±0.03a | -0.12±0.02b | 31.3±7.1a | -0.39±0.12b | 9.36±2.5a | 11.96±4.05a |
T2 | 0.08±0.01c | -0.08±0.04b | 10.6±9.7b | -0.38±0.07b | 9.34±4.23a | 13.81±3.29a |
T3 | 0.16±0.03b | -0.20±0.06c | -4.3±0.36c | -0.41±0.06b | 10.41±2.29a | 8.58±0.83ab |
Tab.15
Ecological benefit evaluation grade of each index
指标 | 差(20分) | 较差(40分) | 中(60分) | 较好(80分) | 好(100分) |
---|---|---|---|---|---|
胸径 | [1.80,3.18) | [3.18,4.56) | [4.56,5.94) | [5.94,7.32) | [7.32,8.7) |
树高 | [2.21,3.85) | [3.85,6.06) | [6.06,8.26) | [8.26,10.47) | [10.47,12.68) |
单株材积 | [0.1045,0.1146) | [0.1146,0.219) | [0.219,0.3235) | [0.3235,0.4279) | [0.4279,0.5324) |
蓄积量 | [8.4,10.6) | [10.6,12.9) | [12.9,15.1) | [15.1,17.4) | [17.4,19.6) |
物种丰富度指数 | [1.0,2.2) | [2.2,3.4) | [3.4,4.6) | [4.6,5.8) | [5.8,7.0) |
Shannon-Wiener 多样性指数 | [0.34,0.56) | [0.56,0.79) | [0.79,1.01) | [1.01,1.24) | [1.24,1.46) |
Simpson 生态优势度指数 | [0.09,0.17) | [0.17,0.24) | [0.24,0.32) | [0.32,0.39) | [0.39,0.47) |
Pielou 均匀度指数 | [0.15,0.23) | [0.23,0.32) | [0.32,0.4) | [0.4,0.49) | [0.49,0.57) |
土壤水解氮含量 | [-0.02,0.03) | [0.03,0.09) | [0.09,0.14) | [0.14,0.2) | [0.2,0.25) |
土壤有效磷含量 | [-0.26,-0.17) | [-0.17,-0.08) | [-0.08,0.01) | [0.01,0.1) | [0.1,0.19) |
土壤速效钾含量 | [-4.6,4.2) | [4.2,13) | [13,21.8) | [21.8,30.6) | [30.6,39.4) |
土壤容重 | [-0.18,-0.10) | [-0.26,-0.18) | [-0.34,-0.26) | [-0.42,-0.34) | [-0.50,-0.42) |
土壤持水率 | [3.1,6) | [6,8.9) | [8.9,11.79) | [11.79,14.69) | [14.69,17.59) |
土壤总孔隙度 | [-1,1.97) | [1.97,4.95) | [4.95,7.92) | [7.92,10.9) | [10.9,13.87) |
冲刷量 | [48.6,57.0) | [40.2,48.6) | [31.8,40.2) | [23.4,31.8) | [15.0,23.4) |
径流系数 | [0.14,0.16) | [0.12,0.14) | [0.11,0.12) | [0.09,0.11) | [0.07,0.09) |
径流量 | [1350,1520) | [1180.1350) | [1011,1180) | [842,1011) | [672,842) |
Tab.16
Weight value of ecological benefit index and evaluation score
生态效益指标 | 权重 | 评价得分 | ||||||
---|---|---|---|---|---|---|---|---|
W1 | W2 | W3 | CK | T1 | T2 | T3 | ||
林分特征因子 | 0.5791 | 0.1897 | 0.3844 | 25.6 | 54.7 | 65.8 | 69.6 | |
林下植被多样性 | 0.1213 | 0.3643 | 0.2428 | 25.1 | 48.5 | 58.1 | 94.9 | |
土壤理化性质 | 0.2326 | 0.2766 | 0.2546 | 41.1 | 74.3 | 75.5 | 48.5 | |
地表径流因子 | 0.0670 | 0.1694 | 0.1182 | 20 | 60.5 | 100 | 79.5 | |
综合得分 | — | 28.8 | 58.9 | 70.4 | 71.6 |
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