摘要
对大庆地区盐渍化土壤（0～10cm）总盐、土壤pH值、碱化度、交换性钠、土壤有机质和阳离子交换量等土壤化学性质及地上生物量空间变异特征进行了研究，结果表明，样地土壤化学性质各指标有较大的变动，存在异质性现象。从自相关尺度上分析，地上生物量、土壤碱化度和全盐的相关尺度相近，为5．3～5．77m；从空间结构方差与总变异方差的比值——结构比来看，地上生物量的结构比最大，为92.0％；土壤pH值、全盐、土壤碱化度的空间结构比也都达到80．0％以上，说明它们表现出很强的空间自相关。而其他土壤化学性质指标结构比为38．3％～70．0％，说明它们表现出中等的空间自相关。地上生物量与除土壤有机质外的土壤其他化学指标均呈显著负相关。
Their spatial heterogeneity was studied for soil chemical properties （horizon 0-10 cm）, including total salt, pH value, exchangeable sodium percentage（ESP） , exchangeable Na^＋ , organic matter and cation exchange capacity, as well as for aboveground hiomass , in saline soil, Daqing. The result shows that these soil chemical properties varies much and appears spatial heterogeneity. For autocorrelated scale, aboveground hiomass, ESP and total salt are quite approximately, that is 5.3-5.77 m; in proportion of spatial variation （ C/C0 ＋ C ）, aboveground hiomass is 92.0% ; spatial structural ratios of pH value, total salt and alkalinity are up to more than 80.0%, which shows greater spatial autocorrelation ; while other soil properties are 38.3%- 70.0%, which shows medium spatial autocorrelation. In addition, aboveground hiomass correlates negatively with all soil chemical properties except for organic matter.
出处
《防护林科技》
2008年第3期44-46,共3页
Protection Forest Science and Technology
关键词
盐碱地
碱化度
全盐
pH值
地统计学
空间异质性
saline-alkali land
degree of alkalization
total salt
pH value
geostatistics
spatial heterogeneity
作者简介
孟祥川（1981-），男，黑龙江哈尔滨人，硕士，研究方向：水土保持学．
