Scientia Silvae Sinicae ›› 2020, Vol. 56 ›› Issue (1): 20-28.doi: 10.11707/j.1001-7488.20200103
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Xiaoyu Cao,Jiping Li,Xia Wei
Received:
2019-03-19
Online:
2020-01-25
Published:
2020-02-24
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Xiaoyu Cao, Jiping Li, Xia Wei. Effects of Spatial Structure on Soil Nutrient Content in Typical Forests in the Contral-Subtropics of China[J]. Scientia Silvae Sinicae, 2020, 56(1): 20-28.
Table 1
Survey of sample plots"
森林类型 Forest types | 样地号 Plot code | 树种组成 Tree species composition | 林龄 Stand age/a | 密度 Density/ hm-2 | 平均胸径 Mean DBH/cm | 平均树高 Mean tree height/m | 郁闭度 Crown density | 坡向 Aspect | 坡度 Slope/ (°) | 海拔 Altitude/ m |
人工针叶纯林 Artificial coniferous pure forest | 1 | 10杉木Cunninghamia lanceolata | 19 | 1 723 | 12.5 | 13.7 | 0.81 | 北N | 16 | 684 |
2 | 10杉木Cunninghamia lanceolata | 19 | 1 812 | 13.3 | 14.1 | 0.85 | 西北NW | 18 | 720 | |
3 | 10杉木Cunninghamia lanceolata | 19 | 1 793 | 12.7 | 13.9 | 0.79 | 北N | 19 | 705 | |
4 | 10马尾松Pinus massoniana | 24 | 1 632 | 18.3 | 15.1 | 0.77 | 西北NW | 17 | 652 | |
5 | 10马尾松Pinus massoniana | 24 | 1 653 | 17.9 | 14.7 | 0.82 | 东北NE | 17 | 694 | |
6 | 10马尾松Pinus massoniana | 24 | 1 682 | 17.5 | 14.9 | 0.83 | 东北NE | 19 | 723 | |
7 | 10柳杉Cryptomeria fortunei | 21 | 1 819 | 16.7 | 15.4 | 0.89 | 西北NW | 18 | 802 | |
8 | 10柳杉Cryptomeria fortunei | 21 | 1 796 | 16.9 | 16.3 | 0.83 | 西北NW | 17 | 763 | |
9 | 10柳杉Cryptomeria fortunei | 21 | 1 825 | 17.3 | 15.9 | 0.86 | 东北NE | 20 | 758 | |
人工阔叶纯林 Artificial broad- leaved pure forest | 10 | 10木荷Schima superba | 25 | 1 512 | 16.4 | 14.4 | 0.79 | 北N | 19 | 651 |
11 | 10木荷Schima superba | 25 | 1 483 | 16.3 | 15.2 | 0.81 | 西北NW | 19 | 643 | |
12 | 10木荷Schima superba | 25 | 1 462 | 15.9 | 14.5 | 0.76 | 西北NW | 18 | 674 | |
人工阔叶混交林 Artificial broad- leaved mixed forest | 13 | 7木荷Schima superba 3闽楠Phoebe bournei | 16 | 1 783 | 12.3 | 9.6 | 0.83 | 东北NE | 20 | 735 |
14 | 7木荷Schima superba 3闽楠Phoebe bournei | 16 | 1 653 | 11.9 | 9.1 | 0.79 | 东北NE | 21 | 782 | |
15 | 7木荷Schima superba 3闽楠Phoebe bournei | 16 | 1 685 | 12.1 | 9.8 | 0.84 | 东北NE | 19 | 813 | |
人工针阔混交林 Artificial coniferous and broad- leaved mixed forest | 16 | 7柳杉Cryptomeria fortunei 3马褂木Liriodendron tulipdfera | 18 | 1 823 | 15.8 | 13.7 | 0.83 | 北N | 18 | 694 |
17 | 7柳杉Cryptomeria fortunei 3马褂木Liriodendron tulipdfera | 18 | 1 819 | 15.3 | 15.9 | 0.81 | 西北NW | 18 | 658 | |
18 | 7柳杉Cryptomeria fortunei 3马褂木Liriodendron tulipdfera | 18 | 1 801 | 15.7 | 16.2 | 0.80 | 西北NW | 20 | 627 | |
19 | 6马尾松Pinus massoniana 4木荷Schima superba | 25 | 1 905 | 13.9 | 12.1 | 0.82 | 北N | 19 | 735 | |
20 | 6马尾松Pinus massoniana 4木荷Schima superba | 25 | 1 897 | 14.2 | 13.4 | 0.85 | 东北NE | 21 | 798 | |
21 | 6马尾松Pinus massoniana 4木荷Schima superba | 25 | 1 890 | 13.3 | 12.9 | 0.83 | 北N | 19 | 762 | |
22 | 7杉木Cunninghamia lanceolata 3木荷Schima superba | 13 | 2 175 | 12.3 | 12.6 | 0.71 | 北N | 20 | 723 | |
23 | 7杉木Cunninghamia lanceolata 3木荷Schima superba | 13 | 2 013 | 11.9 | 13.1 | 0.69 | 西北NW | 18 | 769 | |
24 | 7杉木Cunninghamia lanceolata 3木荷Schima superba | 13 | 2 132 | 12.6 | 13.3 | 0.73 | 西北NW | 19 | 739 | |
天然次生林 Natural secondary forest | 25 | 7青冈栎Cyclobalanopsis glauca 2苦槠Castanopsis sclerophylla 1冬青Ilex chinensis | 41 | 1 298 | 17.5 | 12.5 | 0.81 | 西北NW | 20 | 847 |
26 | 7青冈栎Cyclobalanopsis glauca 2苦槠Castanopsis sclerophylla 1冬青Ilex chinensis | 41 | 1 305 | 15.8 | 11.9 | 0.79 | 北N | 19 | 815 | |
27 | 7青冈栎Cyclobalanopsis glauca 2苦槠Castanopsis sclerophylla 1冬青Ilex chinensis | 41 | 1 245 | 16.3 | 12.1 | 0.84 | 西北NW | 19 | 809 | |
竹林 Bamboo forest | 28 | 10楠竹Phyllostachys pubescens | 17 | 3 018 | 9.7 | 13.7 | 0.84 | 东北NE | 21 | 735 |
29 | 10楠竹Phyllostachys pubescens | 17 | 3 122 | 10.2 | 13.1 | 0.79 | 东北NE | 19 | 724 | |
30 | 10楠竹Phyllostachys pubescens | 17 | 2 984 | 9.9 | 14.2 | 0.81 | 北N | 20 | 716 |
Table 2
Stand spatial structure index of various stand types"
林分空间结构标 Indicators of stand spatial structure | 人工针叶纯林 Artificial coniferouspure forest | 人工阔叶纯林 Artificial broad-leaved pure forest | 人工阔叶混交林 Artificial broad-leaved mixed forest | 人工针阔混交林 Artificial coniferous and broad-leaved mixed forest | 天然次生林 Natural secondary forest | 竹林 Bamboo forest |
混交度Mingling degree | 0.05±0.01 d | 0.02±0.01 d | 0.47±0.04c | 0.52±0.04b | 0.73±0.04a | 0.06±0.01 d |
角尺度Uniform angle | 0.35±0.025c | 0.28±0.03 d | 0.40±0.02b | 0.39±0.02b | 0.49±0.02a | 0.47±0.03a |
林层指数Forest layer index | 0.34±0.04c | 0.36±0.05bc | 0.38±0.05bc | 0.37±0.03b | 0.62±0.04a | 0.45±0.04 d |
Table 3
Soil nutrient content of various stand types"
林分类型 Stand types | 有机质 Organic matter/ (g·kg-1) | 全氮 Total N/ (g·kg-1) | 全磷 Total P/ (g·kg-1) | 碱解氮 Available N/ (mg·kg-1) | 有效磷 Available P/ (mg·kg-1) | 速效钾 Available K/ (mg·kg-1) |
人工针叶纯林 Artificial coniferous pure forest | 12.91±0.64 d | 0.76±0.14b | 0.17±0.08b | 46.56±10.31ab | 1.06±0.18cd | 27.49±5.48b |
人工阔叶纯林 Artificial broad-leaved pure forest | 16.73±1.69c | 0.90±0.17b | 0.18±0.04ab | 75.97±7.14a | 1.87±0.21c | 63.17±10.57a |
人工阔叶混交林 Artificial broad-leaved mixed forest | 20.1±0.35b | 0.91±0.13b | 0.19±0.01ab | 53.97±13.29ab | 2.06±0.34b | 47.53±8.18a |
人工针阔混交林Artificial coniferous and broad-leaved mixed forest | 19.39±3.06bc | 1.12±0.1a | 0.26±0.08a | 20.84±7.35b | 2.47±0.44b | 13.70±2.01b |
天然次生林Natural secondary forest | 29.07±3.21a | 1.27±0.13a | 0.29±0.03ab | 82.87±13.54a | 3.80±0.51a | 53.5±4.86a |
竹林Bamboo forest | 11.13±0.53 d | 0.75±0.19b | 0.22±0.09ab | 34.08±10.76b | 1.21±0.09 d | 13.62±2.82b |
Table 4
Pearson correlation coefficients between stand spatial structure and soil nutrient content"
林分空间结构指标 Indicators of stand spatial structure | 有机质 Organic matter | 全氮 Total N | 全磷 Total P | 碱解氮 Available N | 有效磷 Available P | 速效钾 Available K |
混交度Mingling degree | 0.831** | 0.755** | 0.272 | -0.063 | 0.766** | -0.016 |
角尺度Uniform angle | 0.380* | 0.371* | 0.240 | -0.068 | 0.697** | -0.215 |
林层指数Forest layer index | 0.807** | 0.595** | 0.076 | 0.299 | 0.571** | 0.232 |
Table 5
Regression analysis between stand spatial structure and soil nutrient content"
土壤养分指标 Indicators of soil nutrient | 回归方程 Regression equation | 土壤养分含量的影响因子重要性排序 Importance order of the influence factors on soil nutrient content |
有机质Organic matter | Y1=10.812X1+25.190X3+4.583 R2=0.791 | 混交度Mingling degree (0.523)> 林层指数Forest layer index (0.442) |
全氮Total N | Y2=0.640X1+0.760 R2=0.570 | 混交度Mingling degree |
全磷Total P | 不显著No significant | —— |
碱解氮Available N | 不显著No significant | —— |
有效磷Available P | Y5=8.909X1+27.036X3-7.550 R2=0.683 | 混交度Mingling degree (0.552)> 林层指数Forest layer index (0.405) |
速效钾Available K | 不显著No significant | —— |
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