华北冲积平原农业土壤容重空间变异性分析

Analysis of the Spatial Variability of Agriculture Soil Bulk Density in the Alluvial Plain of North China

通过对中国农业大学曲周试验站所在地土壤质地和土壤容重的测定分析,研究华北冲积平原曲周地区的农业土壤容重空间变异性。结果显示,研究区域土壤容重的空间变异情况复杂,无确定的变化规律;壤质类土壤的容重值为(1.55±0.09)g/cm3,砂质类土壤的容重值为(1.43±0.16)g/cm3,粘质类土壤的容重值为(1.54±0.07)g/cm3,粘砂交错层的土壤容重值为(1.47±0.12)g/cm3,土壤呈紧实趋势。土壤质地不均匀分布是引起土壤容重变化的关键因素。

In Quzhou Experimental Station,Beijing Agriculture University,the soil texture and the soil bulk density were determined to study the spatial variability of agriculture soil bulk density in the alluvial plain of north China.The result showed that the spatial variability of the soil bulk in this area was complicated and there was not a certain variation.The soil bulk density of loamy soil was（1.55±0.09） g/cm3,the soil bulk density of sandy soil was（1.43±0.16）g/cm3 and the soil bulk density of clayey soil was（1.54±0.07）g/cm3.The soil bulk density of the cross-bedding soil composed by sandy soil and clayey soil was（1.47±0.12）g/cm3.The soil showed a tendency to be compacted.The key factor causing the variation of soil bulk density was the uneven distribution of soil texture.