<正>以苯酚作液化剂。稀硫酸作催化剂。对沙柳（Salia"psammophila）、柠条（Caraganaintermedia）和杨木（Populus×Euramericana（Doda）（Guneircv’I-214）进行了液化实验，分析了反应温度、液比、催化利用量及液fL时间对浈化反应的影响。结果表明：（1）在适宜的液化条件下，沙柳、柠条和杨木均能达到理想的液化效果。且杨木比沙柳和柠条更易于液化。（2）反应温度对液化过程的影响最大，液比、催化剂用量等对液化过程也有不同程度的影响。（3）杨木液化适宜的工艺条件为：温度150℃，液比（酚/木）为3，催化剂质量分数7%，时间120min；沙柳和柠条适宜的液化Z-艺条件为：温度150.C，液比（酚/木）为4，催化剂质量分数7%，时间l20min。

Contents and distribution of soil pH, total potassium (TK), total nitrogen (TN), total phosphorus (TP), organic matter (OM) and available phosphorus (AP) across Nanjing urban area were studied using GIS technology and geostatistical analysis methods. Semivariograms for soil pH, total potassium (TK) were well fitted by linear with sill model, and could be further interpolated by block-Kriging, while no suitable model fitted the semivariograms for TP, AP, OM and TN, even after logarithm conversion of these properties. It was suggested that the spatial variability of pH and TK was primarily controlled by the structural factors of the spatial heterogeneity of parent material and landform, whereas variability of TP, AP, OM and TN was greatly affected by urban human activities and they were spatially heterogeneous even in a short distance.