植物生态学报 ›› 2012, Vol. 36 ›› Issue (4): 292-301.DOI: 10.3724/SP.J.1258.2012.00292
收稿日期:
2011-11-21
接受日期:
2012-01-11
出版日期:
2012-11-21
发布日期:
2012-03-28
通讯作者:
吴普特
MA Li-Hui1,2,WU Pu-Te1,*(),WANG You-Ke1
Received:
2011-11-21
Accepted:
2012-01-11
Online:
2012-11-21
Published:
2012-03-28
Contact:
WU Pu-Te
摘要:
该文研究了黄土丘陵半干旱区密植枣( Ziziphus jujuba ‘Lizao’)林群体根系随树龄变化的空间分布特征。对1年生、4年生、8年生和11年生4种树龄的密植枣林采用剖面法, 获得0-1 m土壤剖面上直径>3 mm、1-3 mm及<1 mm的根系数量和空间位置信息。利用方差分析, 评价了山地密植枣林林分根系随树龄变化的水平和垂直分布特征。结果表明: 3种直径的根系数量均随着树龄的增长而增加, 直径< 1 mm的根系增长速度最快; 随着土层加深, 根系数量递减, 1年生枣林的根系主要聚集在0-40 cm土层中, 4年生及以上树龄的根系主要分布在0-60 cm土层中; 0-1 m土层内, 1年生枣林(株距1.2 m)及4年以上树龄(株距2 m), 同树龄枣林中直径<1 mm的根系水平分布无差异; 同一土层中(0-20 cm, 20-40 cm, 40-60 cm), 无论树龄大小及离树干的水平位置如何, 不同直径根系的数量都无差异。研究表明: 在有水肥管理措施的条件下, 枣林根系垂直方向形成浅层型的适应模式; 在密植环境下, 枣林细根形成根网型的适应模式。
马理辉,吴普特,汪有科. 黄土丘陵半干旱区密植枣林随树龄变化的根系空间分布特征. 植物生态学报, 2012, 36(4): 292-301. DOI: 10.3724/SP.J.1258.2012.00292
MA Li-Hui,WU Pu-Te,WANG You-Ke. Spatial pattern of root systems of dense jujube plantation with jujube age in the semiarid loess hilly region of China. Chinese Journal of Plant Ecology, 2012, 36(4): 292-301. DOI: 10.3724/SP.J.1258.2012.00292
树龄 Tree age | 容重 Bulk density (g·cm-3) | 田间持水量 Field moisture capacity (%) | 饱和含水量 Saturated moisture capacity (%) | 速效氮 Available N (mg·kg-1) | 速效磷 Available P (mg·kg-1) | 速效钾 Available K (mg·kg-1) | 有机质 Organic matter (g·kg-1) | pH值 pH value |
---|---|---|---|---|---|---|---|---|
1年生 One-year-old | 1.28 | 22.1 | 38.5 | 11.69 | 4.87 | 119.6 | 4.33 | 8.6 |
4年生 Four-year-old | 1.30 | 23.9 | 41.2 | 12.71 | 4.96 | 120.5 | 4.12 | 8.5 |
8年生 Eight-year-old | 1.30 | 23.5 | 39.7 | 13.24 | 4.83 | 117.3 | 4.89 | 8.5 |
11年生 11-year-old | 1.29 | 24.3 | 39.3 | 13.73 | 4.76 | 116.1 | 4.72 | 8.3 |
表1 枣林土壤理化性质
Table 1 Soil physical and chemical properties of jujube plantation
树龄 Tree age | 容重 Bulk density (g·cm-3) | 田间持水量 Field moisture capacity (%) | 饱和含水量 Saturated moisture capacity (%) | 速效氮 Available N (mg·kg-1) | 速效磷 Available P (mg·kg-1) | 速效钾 Available K (mg·kg-1) | 有机质 Organic matter (g·kg-1) | pH值 pH value |
---|---|---|---|---|---|---|---|---|
1年生 One-year-old | 1.28 | 22.1 | 38.5 | 11.69 | 4.87 | 119.6 | 4.33 | 8.6 |
4年生 Four-year-old | 1.30 | 23.9 | 41.2 | 12.71 | 4.96 | 120.5 | 4.12 | 8.5 |
8年生 Eight-year-old | 1.30 | 23.5 | 39.7 | 13.24 | 4.83 | 117.3 | 4.89 | 8.5 |
11年生 11-year-old | 1.29 | 24.3 | 39.3 | 13.73 | 4.76 | 116.1 | 4.72 | 8.3 |
树龄 Tree age | 冠幅((长+宽)/2) Canopy size ((length + width)/2 ) (m) | 平均树高 Average tree height (m) | 平均直径 Average diameter (mm) | 面积 Area (hm2) |
---|---|---|---|---|
1年生 One-year-old | 0.50 ± 0.12d | 0.41 ± 0.11c | 13.4 ± 4.2d | 5 |
4年生 Four-year-old | 1.71 ± 0.08c | 1.82 ± 0.08b | 62.2 ± 5.4c | 6 |
8年生 Eight-year-old | 1.86 ± 0.05b | 2.20 ± 0.07a | 72.3 ± 3.6b | 20 |
11年生 11-year-old | 2. 2 ± 0.07a | 2.30 ± 0.13a | 84.0 ± 6.2a | 25 |
表2 枣林地林分基本特征
Table 2 Stand basic characteristics of jujube forest land
树龄 Tree age | 冠幅((长+宽)/2) Canopy size ((length + width)/2 ) (m) | 平均树高 Average tree height (m) | 平均直径 Average diameter (mm) | 面积 Area (hm2) |
---|---|---|---|---|
1年生 One-year-old | 0.50 ± 0.12d | 0.41 ± 0.11c | 13.4 ± 4.2d | 5 |
4年生 Four-year-old | 1.71 ± 0.08c | 1.82 ± 0.08b | 62.2 ± 5.4c | 6 |
8年生 Eight-year-old | 1.86 ± 0.05b | 2.20 ± 0.07a | 72.3 ± 3.6b | 20 |
11年生 11-year-old | 2. 2 ± 0.07a | 2.30 ± 0.13a | 84.0 ± 6.2a | 25 |
土层 Soil layer (cm) | 树龄 Tree age | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1年生 One-year-old | 4年生 Four-year-old | 8年生 Eight-year-old | 11年生 11-year-old | ||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||
0-20 | 8.3 | 85.7 | 10.0 | 16.7 | 16.7 | 20.4 | 23.8 | 22.3 | |||
20-40 | 1.4 | 14.3 | 19.2 | 31.9 | 27.5 | 33.7 | 32.5 | 30.5 | |||
40-60 | 0 | 0.0 | 13.3 | 22.2 | 15.0 | 18.4 | 24.2 | 22.7 | |||
60-80 | 0 | 0.0 | 10.0 | 16.7 | 12.5 | 15.3 | 13.3 | 12.5 | |||
80-100 | 0 | 0.0 | 7.5 | 12.5 | 10.0 | 12.2 | 12.8 | 12.0 | |||
合计 Sum | 9.7 | 100.0 | 60.0 | 100.0 | 81.7 | 100.0 | 106.7 | 100.0 |
表3 不同树龄各土层根量及所占比例(直径>3 mm)
Table 3 Number and proportion of coarse root to the total in different soil layers for varied tree ages (diameter > 3 mm)
土层 Soil layer (cm) | 树龄 Tree age | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1年生 One-year-old | 4年生 Four-year-old | 8年生 Eight-year-old | 11年生 11-year-old | ||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||
0-20 | 8.3 | 85.7 | 10.0 | 16.7 | 16.7 | 20.4 | 23.8 | 22.3 | |||
20-40 | 1.4 | 14.3 | 19.2 | 31.9 | 27.5 | 33.7 | 32.5 | 30.5 | |||
40-60 | 0 | 0.0 | 13.3 | 22.2 | 15.0 | 18.4 | 24.2 | 22.7 | |||
60-80 | 0 | 0.0 | 10.0 | 16.7 | 12.5 | 15.3 | 13.3 | 12.5 | |||
80-100 | 0 | 0.0 | 7.5 | 12.5 | 10.0 | 12.2 | 12.8 | 12.0 | |||
合计 Sum | 9.7 | 100.0 | 60.0 | 100.0 | 81.7 | 100.0 | 106.7 | 100.0 |
土层 Soil layer (cm) | 树龄 Tree age | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1年生 One-year-old | 4年生 Four-year-old | 8年生 Eight-year-old | 11年生 11-year-old | ||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||
0-20 | 47.2 | 54.0 | 20.8 | 23.1 | 35.8 | 26.9 | 71.0 | 32.4 | |||
20-40 | 37.5 | 42.9 | 20.0 | 22.2 | 32.5 | 24.4 | 62.4 | 28.5 | |||
40-60 | 2.8 | 3.2 | 22.5 | 25.0 | 27.3 | 20.5 | 33.1 | 15.1 | |||
60-80 | 0.0 | 0.0 | 17.5 | 19.4 | 21.7 | 16.3 | 29.6 | 13.5 | |||
80-100 | 0.0 | 0.0 | 9.2 | 10.2 | 15.8 | 11.9 | 22.8 | 10.4 | |||
合计 Sum | 87.5 | 100.0 | 90.0 | 100.0 | 133.2 | 100.0 | 218.9 | 100.0 |
表4 不同树龄各土层根量及所占比例(直径1-3 mm)
Table 4 Number and proportion of medium-sized root to the total in different soil layers for varied tree ages (diameter 1-3 mm)
土层 Soil layer (cm) | 树龄 Tree age | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1年生 One-year-old | 4年生 Four-year-old | 8年生 Eight-year-old | 11年生 11-year-old | ||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||
0-20 | 47.2 | 54.0 | 20.8 | 23.1 | 35.8 | 26.9 | 71.0 | 32.4 | |||
20-40 | 37.5 | 42.9 | 20.0 | 22.2 | 32.5 | 24.4 | 62.4 | 28.5 | |||
40-60 | 2.8 | 3.2 | 22.5 | 25.0 | 27.3 | 20.5 | 33.1 | 15.1 | |||
60-80 | 0.0 | 0.0 | 17.5 | 19.4 | 21.7 | 16.3 | 29.6 | 13.5 | |||
80-100 | 0.0 | 0.0 | 9.2 | 10.2 | 15.8 | 11.9 | 22.8 | 10.4 | |||
合计 Sum | 87.5 | 100.0 | 90.0 | 100.0 | 133.2 | 100.0 | 218.9 | 100.0 |
土层 Soil layer (cm) | 树龄 Tree age | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1年生 One-year-old | 4年生 Four-year-old | 8年生 Eight-year-old | 11年生 11-year-old | ||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||
0-20 | 711.1 ± 553.7c | 36.1 | 842.5 ± 555.1c | 25.1 | 1 290 ± 674.2b | 27.5 | 2 068.3 ± 696.0a | 31.2 | |||
20-40 | 652.8 ± 386.4c | 33.1 | 850.0 ± 351.2c | 25.3 | 1 305.8 ± 578.3b | 27.8 | 1 857.5 ± 542.0a | 28.0 | |||
40-60 | 298.6 ± 201d | 15.2 | 831.7 ± 468.0c | 24.7 | 1 166.7 ± 687.3b | 24.8 | 1 533.3 ± 426.4a | 23.1 | |||
60-80 | 177.8 ± 150b | 9.0 | 620.8 ± 325.0a | 18.5 | 622.5 ± 441.1a | 13.2 | 730.8 ± 278.4a | 11.0 | |||
80-100 | 129.2 ± 79.2d | 6.6 | 216.7 ± 89.2c | 6.4 | 313.3 ± 173.9b | 6.7 | 441.7 ± 191.0a | 6.7 | |||
合计 Sum | 2 569.5 | 100.0 | 3 761.7 | 100.0 | 4 698.3 | 100.0 | 6 631.6 | 100.0 |
表5 不同树龄各土层根量及所占比例(直径<1 mm) (平均值±标准偏差)
Table 5 Number and proportion of fine root to the total in different soil layers for varied tree ages (diameter < 1 mm) (mean ± SD)
土层 Soil layer (cm) | 树龄 Tree age | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1年生 One-year-old | 4年生 Four-year-old | 8年生 Eight-year-old | 11年生 11-year-old | ||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||
0-20 | 711.1 ± 553.7c | 36.1 | 842.5 ± 555.1c | 25.1 | 1 290 ± 674.2b | 27.5 | 2 068.3 ± 696.0a | 31.2 | |||
20-40 | 652.8 ± 386.4c | 33.1 | 850.0 ± 351.2c | 25.3 | 1 305.8 ± 578.3b | 27.8 | 1 857.5 ± 542.0a | 28.0 | |||
40-60 | 298.6 ± 201d | 15.2 | 831.7 ± 468.0c | 24.7 | 1 166.7 ± 687.3b | 24.8 | 1 533.3 ± 426.4a | 23.1 | |||
60-80 | 177.8 ± 150b | 9.0 | 620.8 ± 325.0a | 18.5 | 622.5 ± 441.1a | 13.2 | 730.8 ± 278.4a | 11.0 | |||
80-100 | 129.2 ± 79.2d | 6.6 | 216.7 ± 89.2c | 6.4 | 313.3 ± 173.9b | 6.7 | 441.7 ± 191.0a | 6.7 | |||
合计 Sum | 2 569.5 | 100.0 | 3 761.7 | 100.0 | 4 698.3 | 100.0 | 6 631.6 | 100.0 |
树龄 Tree age | 从左到右水平距离 Horizontal distance from left to right side (cm) | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0-40 | 40-80 | 80-120 | 120-160 | 160-200 | 合计 Sum | ||||||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||||
1年生 One-year-old | 41.7 ± 8.9a | 43.0 | 22.0 ± 14.4a | 22.7 | 33.3 ± 14.4a | 34.3 | - | - | - | - | 97.0 | 100.0 | |||||
4年生 Four-year-old | 91.6 ± 14.5b | 15.3 | 75.0 ± 28.0b | 12.5 | 100.0 ± 25.0b | 16.7 | 108.3 ± 23.3b | 18.1 | 225.0 ± 16.5a | 37.5 | 600.0 | 100.0 | |||||
8年生 Eight-year-old | 208.3 ± 50.2a | 25.5 | 125.0 ± 43.3b | 15.3 | 141.6 ± 32.2b | 17.3 | 133.7 ± 52.0b | 16.4 | 208.4 ± 62.9a | 25.5 | 817.0 | 100.0 | |||||
11年生 11-year-old | 216.7 ± 90.1a | 20.3 | 158.3 ± 50.0a | 14.8 | 200.0 ± 90.1a | 18.7 | 233.3 ± 118.1a | 21.9 | 258.4 ± 137.7a | 24.2 | 1 066.7 | 100.0 |
表6 不同树龄株间水平位置根量及所占比例(直径>3 mm) (平均值±标准偏差)
Table 6 Number and proportion of coarse root to the total in different horizontal locations for varied tree ages (diameter > 3 mm) (mean ± SD)
树龄 Tree age | 从左到右水平距离 Horizontal distance from left to right side (cm) | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0-40 | 40-80 | 80-120 | 120-160 | 160-200 | 合计 Sum | ||||||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||||
1年生 One-year-old | 41.7 ± 8.9a | 43.0 | 22.0 ± 14.4a | 22.7 | 33.3 ± 14.4a | 34.3 | - | - | - | - | 97.0 | 100.0 | |||||
4年生 Four-year-old | 91.6 ± 14.5b | 15.3 | 75.0 ± 28.0b | 12.5 | 100.0 ± 25.0b | 16.7 | 108.3 ± 23.3b | 18.1 | 225.0 ± 16.5a | 37.5 | 600.0 | 100.0 | |||||
8年生 Eight-year-old | 208.3 ± 50.2a | 25.5 | 125.0 ± 43.3b | 15.3 | 141.6 ± 32.2b | 17.3 | 133.7 ± 52.0b | 16.4 | 208.4 ± 62.9a | 25.5 | 817.0 | 100.0 | |||||
11年生 11-year-old | 216.7 ± 90.1a | 20.3 | 158.3 ± 50.0a | 14.8 | 200.0 ± 90.1a | 18.7 | 233.3 ± 118.1a | 21.9 | 258.4 ± 137.7a | 24.2 | 1 066.7 | 100.0 |
树龄 Tree age | 从左到右水平距离 Horizontal distance from left to right side (cm) | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0-40 | 40-80 | 80-120 | 120-160 | 160-200 | 合计 Sum | ||||||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||||
1年生 One-year-old | 299.9 ± 144.3a | 34.3 | 258.3 ± 66.1a | 29.5 | 316.6 ± 62.9a | 36.2 | - | - | - | - | 874.8 | 100.0 | |||||
4年生 Four-year-old | 208.3 ± 46.4ab | 23.1 | 183.4 ± 37.6ab | 20.4 | 100.0 ± 41.2b | 11.1 | 158.4 ± 87.7ab | 17.6 | 250.0 ± 100.0a | 27.8 | 900.1 | 100.0 | |||||
8年生 Eight-year-old | 233.3 ± 14.4a | 19.6 | 291.7 ± 76.3a | 24.5 | 225.0 ± 35.5a | 18.9 | 208.3 ± 70.5a | 17.5 | 233.3 ± 55.0a | 19.6 | 1 191.6 | 100.0 | |||||
11年生 11-year-old | 463.2 ± 56.3a | 21.2 | 438.2 ± 96.4a | 20.0 | 378.8 ± 56.3a | 17.3 | 421.5 ± 126.3a | 19.2 | 488.15 ± 136.3a | 22.3 | 2 189.9 | 100.0 |
表7 不同树龄株间水平位置根量及所占比例(直径1-3 mm) (平均值±标准偏差)
Table 7 Number and proportion of medium-sized root to the total in different horizontal locations for varied tree ages (diameter 1-3 mm) (mean ± SD)
树龄 Tree age | 从左到右水平距离 Horizontal distance from left to right side (cm) | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0-40 | 40-80 | 80-120 | 120-160 | 160-200 | 合计 Sum | ||||||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||||
1年生 One-year-old | 299.9 ± 144.3a | 34.3 | 258.3 ± 66.1a | 29.5 | 316.6 ± 62.9a | 36.2 | - | - | - | - | 874.8 | 100.0 | |||||
4年生 Four-year-old | 208.3 ± 46.4ab | 23.1 | 183.4 ± 37.6ab | 20.4 | 100.0 ± 41.2b | 11.1 | 158.4 ± 87.7ab | 17.6 | 250.0 ± 100.0a | 27.8 | 900.1 | 100.0 | |||||
8年生 Eight-year-old | 233.3 ± 14.4a | 19.6 | 291.7 ± 76.3a | 24.5 | 225.0 ± 35.5a | 18.9 | 208.3 ± 70.5a | 17.5 | 233.3 ± 55.0a | 19.6 | 1 191.6 | 100.0 | |||||
11年生 11-year-old | 463.2 ± 56.3a | 21.2 | 438.2 ± 96.4a | 20.0 | 378.8 ± 56.3a | 17.3 | 421.5 ± 126.3a | 19.2 | 488.15 ± 136.3a | 22.3 | 2 189.9 | 100.0 |
树龄 Tree age | 从左到右水平距离 Horizontal distance from left to right side (cm) | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0-40 | 40-80 | 80-120 | 120-160 | 160-200 | 合计 Sum | ||||||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||||
1年生 One-year-old | 6 775.0 ± 1 512.6a | 34.4 | 6 261.3 ± 1 479.5a | 31.8 | 6 658.4 ± 1 771.7a | 33.8 | - | - | - | - | 19 694.7 | 100.0 | |||||
4年生 Four-year-old | 6 950.0 ± 1 425.8a | 20.7 | 6 991.6 ± 3 775.4a | 20.8 | 6 800.0 ± 4 672.6a | 20.2 | 6 858.3 ± 1 428.4a | 20.4 | 6 016.7 ± 662.5a | 17.9 | 33 616.6 | 100.0 | |||||
8年生 Eight-year-old | 8 900.0 ± 1 327.8a | 18.9 | 9 683.3 ± 2 735.4a | 20.6 | 9 550.0 ± 6 274.5a | 20.3 | 9 725.0 ± 2 351.5a | 20.7 | 9 125.0 ± 1603.9a | 19.4 | 46 983.3 | 100.0 | |||||
11年生 11-year-old | 10 150.0 ± 2 926.1a | 19.2 | 10 675.0 ± 368.2a | 20.2 | 10 041.6 ± 2 532.4a | 19.0 | 11 266.6 ± 1 130.0a | 21.3 | 10 683.0 ± 3170.6a | 20.2 | 52 816.6 | 100.0 |
表8 不同树龄株间水平位置根量及所占比例(直径< 1 mm) (平均值±标准偏差)
Table 8 Number and proportion of fine root to the total in different horizontal locations for varied tree ages (diameter < 1 mm) (mean ± SD)
树龄 Tree age | 从左到右水平距离 Horizontal distance from left to right side (cm) | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0-40 | 40-80 | 80-120 | 120-160 | 160-200 | 合计 Sum | ||||||||||||
根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | 根量 Root number (number·m-2) | % | ||||||
1年生 One-year-old | 6 775.0 ± 1 512.6a | 34.4 | 6 261.3 ± 1 479.5a | 31.8 | 6 658.4 ± 1 771.7a | 33.8 | - | - | - | - | 19 694.7 | 100.0 | |||||
4年生 Four-year-old | 6 950.0 ± 1 425.8a | 20.7 | 6 991.6 ± 3 775.4a | 20.8 | 6 800.0 ± 4 672.6a | 20.2 | 6 858.3 ± 1 428.4a | 20.4 | 6 016.7 ± 662.5a | 17.9 | 33 616.6 | 100.0 | |||||
8年生 Eight-year-old | 8 900.0 ± 1 327.8a | 18.9 | 9 683.3 ± 2 735.4a | 20.6 | 9 550.0 ± 6 274.5a | 20.3 | 9 725.0 ± 2 351.5a | 20.7 | 9 125.0 ± 1603.9a | 19.4 | 46 983.3 | 100.0 | |||||
11年生 11-year-old | 10 150.0 ± 2 926.1a | 19.2 | 10 675.0 ± 368.2a | 20.2 | 10 041.6 ± 2 532.4a | 19.0 | 11 266.6 ± 1 130.0a | 21.3 | 10 683.0 ± 3170.6a | 20.2 | 52 816.6 | 100.0 |
树龄 Tree age | 土层深度 Soil layer depth (cm) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
0-20 | 20-40 | 40-60 | |||||||||
>3 mm | 1-3 mm | <1 mm | >3 mm | 1-3 mm | <1 mm | >3 mm | 1-3 mm | <1 mm | |||
1年生 One-year-old | 0.296 | 0.226 | 0.587 | 0.422 | 0.329 | 0.188 | - | 0.422 | 0.444 | ||
4年生 Four-year-old | 0.429 | 0.810 | 0.719 | 0.102 | 0.068 | 0.611 | 0.664 | 0.817 | 0.825 | ||
8年生 Eight-year-old | 0.596 | 0.189 | 0.966 | 0.570 | 0.510 | 0.499 | 0.914 | 0.824 | 0.615 | ||
11年生 11-year-old | 0.393 | 0.835 | 0.478 | 0.279 | 0.876 | 0.252 | 0.636 | 0.971 | 0.356 |
Table 9 p value of ANOVA for root number (40-cm horizontal spacing)
树龄 Tree age | 土层深度 Soil layer depth (cm) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
0-20 | 20-40 | 40-60 | |||||||||
>3 mm | 1-3 mm | <1 mm | >3 mm | 1-3 mm | <1 mm | >3 mm | 1-3 mm | <1 mm | |||
1年生 One-year-old | 0.296 | 0.226 | 0.587 | 0.422 | 0.329 | 0.188 | - | 0.422 | 0.444 | ||
4年生 Four-year-old | 0.429 | 0.810 | 0.719 | 0.102 | 0.068 | 0.611 | 0.664 | 0.817 | 0.825 | ||
8年生 Eight-year-old | 0.596 | 0.189 | 0.966 | 0.570 | 0.510 | 0.499 | 0.914 | 0.824 | 0.615 | ||
11年生 11-year-old | 0.393 | 0.835 | 0.478 | 0.279 | 0.876 | 0.252 | 0.636 | 0.971 | 0.356 |
树龄 Tree age | 土层深度 Soil layer depth (cm) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
0-20 | 20-40 | 40-60 | |||||||||
>3 mm | 1-3 mm | <1 mm | >3 mm | 1-3 mm | <1 mm | >3 mm | 1-3 mm | <1 mm | |||
1年生 One-year-old | 0.785 | 0.128 | 0.866 | 0.458 | 0.391 | 0.380 | - | 0.571 | 0.613 | ||
4年生 Four-year-old | 0.680 | 0.855 | 0.727 | 0.124 | 0.237 | 0.376 | 0.165 | 0.731 | 0.521 | ||
8年生 Eight-year-old | 0.427 | 0.271 | 0.988 | 0.751 | 0.703 | 0.293 | 0.992 | 0.679 | 0.462 | ||
11年生 11-year-old | 0.718 | 0.937 | 0.590 | 0.325 | 0.946 | 0.440 | 0.664 | 0.980 | 0.323 |
表10 根量方差分析的p值(20 cm水平间距)
Table 10 p value of ANOVA for root number (20-cm horizontal spacing)
树龄 Tree age | 土层深度 Soil layer depth (cm) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
0-20 | 20-40 | 40-60 | |||||||||
>3 mm | 1-3 mm | <1 mm | >3 mm | 1-3 mm | <1 mm | >3 mm | 1-3 mm | <1 mm | |||
1年生 One-year-old | 0.785 | 0.128 | 0.866 | 0.458 | 0.391 | 0.380 | - | 0.571 | 0.613 | ||
4年生 Four-year-old | 0.680 | 0.855 | 0.727 | 0.124 | 0.237 | 0.376 | 0.165 | 0.731 | 0.521 | ||
8年生 Eight-year-old | 0.427 | 0.271 | 0.988 | 0.751 | 0.703 | 0.293 | 0.992 | 0.679 | 0.462 | ||
11年生 11-year-old | 0.718 | 0.937 | 0.590 | 0.325 | 0.946 | 0.440 | 0.664 | 0.980 | 0.323 |
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