近40年黑龙江省两大平原土壤有机质时空变化规律
|
|
杨贺平, 赵小静, 孙江军
|
Spatiotemporal changes of soil organic matter in the Songnen and Sanjiang plains of Heilongjiang Province over 40 years
|
|
YANG He-Ping, ZHAO Xiao-Jing, SUN Jiang-Jun
|
|
表5 1980~2020年两大平原主要土壤类型表层土壤(0~20 cm)SOM含量等级变化特征统计
|
Table 5 Statistical characteristics of changes of SOM content levels in surface soil (0~20 cm) of the main soil types in the two great plains from 1980 to 2020
|
|
| 土壤类型 | 变化分级 | 增四级 | 增三级 | 增二级 | 增一级 | 不明显 | 降一级 | 降二级 | 降三级 | 降四级 | | ΔSOM/10-3 | >40 | 30~40 | 20~30 | 10~20 | -10~10 | -20~-10 | -30~-20 | -40~-30 | ≤-40 | | 草甸土 | 面积/km2 | 7.4 | 11.6 | 1629.1 | 8589.6 | 40202.2 | 26114.7 | 7539.9 | 1299.2 | 86.5 | | 比例/% | 0.01 | 0.01 | 1.91 | 10.05 | 47.03 | 30.55 | 8.82 | 1.52 | 0.10 | | 暗棕壤 | 面积/km2 | 0 | 0 | 1284.4 | 3925.4 | 31018.9 | 8608.8 | 2489.3 | 85.0 | 5.1 | | 比例/% | 0 | 0 | 2.71 | 8.28 | 65.42 | 18.16 | 5.25 | 0.18 | 0.01 | | 黑土 | 面积/km2 | 0 | 0 | 298.9 | 3112.9 | 22914.5 | 13545.2 | 1645.5 | 91.0 | 0 | | 比例/% | 0 | 0 | 0.72 | 7.48 | 55.07 | 32.55 | 3.95 | 0.22 | 0 | | 白浆土 | 面积/km2 | 0 | 0 | 591.9 | 5525.8 | 12433.4 | 4175.5 | 1070.9 | 19.8 | 0 | | 比例/% | 0 | 0 | 2.49 | 23.20 | 52.20 | 17.53 | 4.50 | 0.08 | 0 | | 沼泽土 | 面积/km2 | 29.8 | 29.1 | 546.3 | 2107.0 | 16480.5 | 2348.1 | 422.7 | 83.6 | 1.1 | | 比例/% | 0.14 | 0.13 | 2.48 | 9.56 | 74.75 | 10.65 | 1.92 | 0.38 | 0.01 | | 黑钙土 | 面积/km2 | 0 | 0 | 52.4 | 1530.9 | 9024.4 | 9181.8 | 1381.4 | 223.6 | 2.5 | | 比例/% | 0 | 0 | 0.24 | 7.15 | 42.18 | 42.91 | 6.46 | 1.05 | 0.01 | | 风沙土 | 面积/km2 | 1.1 | 4.2 | 13.8 | 354.4 | 1906.4 | 2058.5 | 932.0 | 201.8 | 31.4 | | 比例/% | 0.02 | 0.08 | 0.25 | 6.44 | 34.64 | 37.40 | 16.94 | 3.67 | 0.57 | | 水稻土 | 面积/km2 | 0 | 0 | 62.7 | 461.9 | 1905.2 | 810.4 | 330.1 | 0 | 0 | | 比例/% | 0 | 0 | 1.76 | 12.94 | 53.36 | 22.70 | 9.25 | 0 | 0 |
|
|
|