本研究从区域土壤生态系统的观点出发,选择太湖流域二个主要生态区的各一个代表地段作为生态样区。通过代表剖面的理化和矿物分析,研究了土壤组合的特点,并以方格-随机法布置观测和采样点,用趋势面分析了土壤组合内的性态变异规律。表明圩区土壤组合深受人为堆迭层的影响,趋于均一化;平原区土壤组合由于人为耕作等影响,土壤性态发生明显变异。两个组合中有机质和全氮含量随地形增高而下降,全磷含量则有在居民点附近富集的趋势。在目前管理水平下,圩区水稻土肥力水平差异小,其上作物产量的差异不明显,作物产量由管理措施的好坏而决定;平原区土壤组合中,肥力越高的土壤,作物产量的平均值越高,而变异系数越小。由此说明,土援组合的性态变异特点,既受自然因素和人为活动的影响,又影响作物生长,是土壤生态系统水平结构的基础。 In this paper, from the viewpoint of regional soil ecosystem, each representative area of ​​two main ecological zones in Taihu Lake Basin was selected as the ecological sample. Through the physical and chemical analysis of representative sections, the characteristics of soil assemblages were studied, and the observation and sampling points were arranged by the grid-random method. The trend of variation of the soil composition was analyzed by trend surface. The results showed that the soil assemblages in the polder area were affected by the man-made pile stacking and tended to be homogenized. Because of the influence of man-made tillage, the soil properties in the plain area varied significantly. The organic matter and total nitrogen content of the two combinations decreased with the increase of the terrain, while the total phosphorus content had the tendency of enrichment near the settlements. Under current management level, there is little difference in fertility level of paddy soils in polder area, and there is no obvious difference in crop yield between them. The crop yield is determined by the management measures; in the plain soil area, the soil with higher fertility and crop yield The higher the average, the smaller the coefficient of variation. This shows that the characteristics of the morphological variations of the soil-aid groups are not only affected by natural and man-made activities, but also affect crop growth, which is the foundation of the horizontal structure of soil ecosystem.