云浮市油茶适生区土壤中量元素分析

选择云浮市 15 个镇（街道）的森林土壤钙、镁、硫含量为研究对象，比较分析其空间变异性。结果显示：研究区森林土壤交换钙含量在 0.232~0.984 g · kg -1 之间，含量较高的有富林和高村，含量较低的为云城和河口；森林土壤交换镁含量在 0.048~0.095 g · kg -1 之间，含量较高的有高村和都杨，含量较低的为云城和高峰；森林土壤全硫含量在 0.126~0.235 g · kg -1 之间，含量较高的有思劳和石城，含量较低的为腰古和高峰；土壤交换钙、交换镁间存在极显著的正相关关系，交换钙与全硫间存在极显著的负相关关系，交换镁与全硫间则没有显著的相互关系。

Soil Calcium, Magnesium and Sulfur Content of Camellia oleifera Suitable Areas in Yunfu City

The spatial variabilities of soil calcium, magnesium and sulfur were compared in the forest of 15towns of Yunfu city, Guangdong province. The results are as follows: The forest soil exchange calcium content of0.232~0.984 g · kg -1 , the higher the content of Fulin and Gaocun, the lower the content of Yuncheng and Hekou. Theforest soil exchange magnesium content of 0.048-0.095 g · kg -1 , the higher the content of Gaocun and Duyang, thelower the content of Yuncheng and Gaofeng. The forest soil total sulfur content of 0.126-0.235 g · kg -1 , the higherthe content of Silao and Shicheng, the lower the content of Yaogu and Gaofeng. There was a significant positivecorrelation between calcium exchange and magnesium exchange, a significant negative correlation between calciumexchange and total sulfur, and no significant correlation between exchange magnesium and total sulfur.