三峡库区杉木马尾松混交林和马尾松纯林的土壤含水量空间变异性
Spatial Variability of Soil Moisture in Cunninghamia lanceolata and Pinus massoniana Mixed Forest and Pinus massoniana Pure Forest\nin Three Gorges Reservoir Area
-
摘要: 土壤水分含量是对地表生态过程有着重要影响的生态因子,在三峡库区生态环境保护中具有重要作用。选取三峡库区典型植被类型杉木、马尾松混交林(A)和马尾松纯林(B),通过网格(3.00 m×3.00 m)取样,地统计学方法研究群落(30.00 m×30.00 m)0.00 - 20.00 cm土壤水分的空间特征。结果表明:(1)两种典型植物群落土壤含水量空间变异性不同,样地A和样地B土壤含水量的变异系数分别表现出弱和中等强度的变异性;(2)两种典型植物群落土壤水分具有良好的半方差结构,半方差函数曲线可以用球状模型进行拟合。土壤水分的空间相关范围存在明显的差异,有效变程分别为51.00 m和12.37 m;土壤水分分布格局呈明显的斑块状分布;(3)在本研究区域内,植被、地形和地貌等是影响土壤含水量空间异质性的主要因素。Abstract: The soil moisture is a most important ecological factor on the earth's surface ecological process. It plays an important role in ecological environment protection in Three Gorges Reservoir Area. The geostatistics method was used to determine and quantify the spatial variability of soil water(0.00 - 20.00 cm)for analysis of spatial patters of soil moisture in two typical forest communities (30.00 m×30.00 m)i.e.Cunninghamia lanceolata and Pinus massoniana mixed forest(A), Pinus massoniana pure forest(B)in the Three Gorges Reservoir Area.Using the grid sampling method(3.00 m×3.00 m space),98 sampling points were fixed in tota1.Based on autocorrelation analysis, the spatial correlation structure of these soil moisture patterns was calculated with the aid of the Moran's I index.The results showed that:(1) the spatial heterogeneity of soil moisture was different obviously between the two forest types, the spatial heterogeneity of plot B was stronger than that of plot A; (2) the analysis of semivariogram at all types had good semivariogram structure. Significant differences were found on spatial heterogeneity of soil moisture between plot A and B. Two semivariance graphs could be expressed by spherical model. There were significant differences in the ranges of spatial autocorrelation between the two types communities, the effective ranges of soil moisture were 51.00 m and 12.37 m, respectively. Autocorrelated spatial heterogeneity was a main component of the spatial heterogeneity. Their spatial pattern came out as obvious patches from the spatial framework maps; (3) The soil moisture spatial variability in this region mostly contributed to the influencing factors, such as vegetation topography and micro-physiognomy.
-
Key words:
- soil moisture
- / spatial variability
- / Three Gorges Reservoir Area
-
[2] 赵 军,张久明,孟 凯,等. 地统计学及GIS 在黑土区域土壤养分空间异质性分析中的应用——以海伦市为例[J].水土保持通报,2004,24(6):53-57 [2] 高玉蓉,许红卫. 稻田土壤养分的空间变异性研究[J].土壤通报,2005,36(6):822-825 [3] 张继光,陈洪松,苏以荣,等. 喀斯特地区典型峰丛洼地表层土壤水分空间变异及合理取样数研究[J].水土保持学报,2006,20(2):114-118 [4] 李子忠,龚元石.农田土壤水分和电导率空间变异性及确定其采样数的方法[J].中国农业大学学报,2000,5(5):59-66 [5] Western A W, Blǒschl G, Grayson R B. Geostatistical characterisation of soil moisture patterns in the tarrawarra catchment[J].Journal of Hydrology, 1998, 205: 20-37 [6] 王鹏程,肖文发,张守攻,等. 三峡库区主要森林植被类型土壤渗透性能研究[J].水土保持学报,2007,27(6):51-56 [7] 李昌晓,钟章成. 三峡库区消落带土壤水分变化对落羽杉(Taxodium distichum)幼苗根部次生代谢物质含量及根生物量的影响[J].生态学报,2007,27(11):4394-4402 [8] 廖晓勇,罗承德,陈治谏,等. 三峡库区坡耕地粮经果复合垄作对土壤水分特征的影响[J].干旱地与农业研究,2008,26(5):75-79 [9] 王政权. 地统计学在生态学中的应用[M].北京:科学出版社, 1999 [10] [10] Basaran M, Erpul G, Tercan A E, et al. The effects of land use changes on some soil properties in Indagi Mountain Pass-Cankiri, Turkey[J]. Environmental Monitoring Assessment, 2008, 136: 101-119 [11] [11] 王景雷,孙景生,刘祖贵,等. 作物需水量观测站点的优化设计[J].水利学报,2005,36(2):225-231 [12] [12] Ashraf M, Loftis J C, Hubbard K G. Application of geostatistics to evaluate partial weather station networks [J].Agricultural and Forest Meteorology, 1997, 84: 255-271 [13] [13] 张 伟,陈洪松,王克林,等.喀斯特地区典型峰丛洼地旱季表层土壤水分空间变异性初探[J].土壤学报,2006,43(4):554-562 [14] [14] Cambardella C A, Moorman T B, Parkin T B, et al. Field-scale variability of soil properties in central Iowa soils[J]. Soil Science Society of America Journal,1994, 58: 1501-1511 [15] [15] 王晓春,韩士杰,邹春静,等. 长白山岳桦种群格局的地统计学分析[J].应用生态学报,2002,13(7):781-784 [16] [16] 谷加存,王政权,韩有志,等. 采伐干扰对帽儿山天然次生林土壤表层水分空间异质性的影响[J].生态学报,2005,25(8):2001-2009 [17] [17] 王 芳,苏永中. 典型生态系统定位观测样地的土壤性状空间变异性评价[J].水土保持学报,2007,21(2):95-98,118 [18] -
点击查看大图
计量
- 文章访问数: 3547
- HTML全文浏览量: 146
- PDF下载量: 1655
- 被引次数: 0
下载:
