| 退化红壤区不同模式重建森林土壤水分空间变异性 |
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| 引用本文： | 杜志勇,刘苑秋,郑诗樟,王红胜.退化红壤区不同模式重建森林土壤水分空间变异性[J].水土保持学报,2007,21(5):101-105. |
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| 作者姓名： | 杜志勇 刘苑秋 郑诗樟 王红胜 |
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| 作者单位： | 1. 江西农业大学,园林与艺术学院,南昌,330045
2. 江西农业大学,国土资源与环境学院,南昌,330045 |
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| 摘 要： | 采用地统计学的方法,研究了江西泰和退化红壤区不同模式重建森林在高温干旱季节土壤水分空间变异规律及其分布格局。结果表明,在该研究尺度下,湿地松纯林、枫香纯林、湿地松与枫香混交林0~20 cm,20~40cm土层含水量分布都符合正态分布,都可较好地拟合成球状模型,表现出明显的空间相关性和空间分布格局。3种重建模式样地0~20 cm,20~40 cm层土壤含水量变异函数的基台值、变程都较无林荒地明显增大,而且基台值和变程在0~20 cm,20~40 cm两土层间的差异明显大于无林荒地,说明植被恢复以后,土壤水分的空间分布特征明显改变,空间变异性增强,空间变异的程度和尺度都明显增大,土壤水分的空间变异也具有较为明显的层次性。与纯林相比,湿地松×枫香混交林土壤水分的空间变异程度较低,水分分布趋于均匀化。
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| 关 键 词： | 退化红壤 重建森林 土壤水分 空间变异性 |
| 文章编号： | 1009-2242（2007）05-0101-05 |
| 收稿时间： | 2007-02-01 |
| 修稿时间： | 2007年2月1日 |
Spatial Variability of Soil Moisture in Different Models of Rehabilitated Forest in Degraded Red Soil Region |
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| DU Zhi-yong,LIU Yuan-qiu,ZHENG Shi-zhang,WANG Hong-sheng.Spatial Variability of Soil Moisture in Different Models of Rehabilitated Forest in Degraded Red Soil Region[J].Journal of Soil and Water Conservation,2007,21(5):101-105. |
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| Authors: | DU Zhi-yong LIU Yuan-qiu ZHENG Shi-zhang WANG Hong-sheng |
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| Abstract: | In this paper geostatistical theory and methods are used to study the spatial variability and the spatial distributing characters of soil moisture of different models of rehabilitated forest in dry season in Taihe county,Jiangxi province.The results showed that the soil moisture in 0~20 cm and 20~40 cm soil layers of grassland,Pinus elliottii plantation,Liquidambar formosana plantation and the forest mixed Liquidambar formosana with Pinus elliottii could be expressed by spherical model,and the soil moisture showed medium or strong spatial correlation and obvious spatial distributing patterns.The sills and ranges of semivariogram of three models of rehabilitated forest were obviously larger than that of grassland,and the differences between the two layers are also larger than that of grassland,which showed that variation extent,and the ranges of soil moisture are larger after rehabilitation,and spatial variability changed with layers.Compared with pure forests,soil moisture of the model mixed with Liquidambar formosana with Pinus elliottii had lower spatial variability,and the distribution of soil moisture tended to become homogeneous. |
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| Keywords: | degraded red soil rehabilitated forest soil moisture spatial variability |
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