安徽省土壤有效硅含量分布

Content and Distribution of Available Silicon in Soil of Anhui Province

从安徽省各地采集的251个土壤样品有效硅平均含量为155.7±8.5ppm,其中53.8%土样含量低于100ppm,霍邱、合肥至芜湖一线以南以西地区有效硅含量低,以东以北地区含量高。主要土类土壤有效硅含量,砂姜黑土>潮土>石灰岩土>黄棕壤>水稻土>粗骨土>红壤>紫色土。不同母质土壤有效硅含量,黄土性古河湖相沉积物>近代黄泛>石灰岩>湖积物>下蜀黄土>河流冲击物>紫色岩>第四纪红土>花岗岩>泥质岩类土壤。土壤pH与有效硅含量之间呈正相关,酸性土壤缺硅的可能性较大。

The content of soil available Si averages 155. 7±8.5μg/g soil for 251 soil samples of Anhuiprovince. The content was below 100μg/g soil in 54% of the samples. The content of availableSi tends to reduce in the southern part of Huo quiu-HeFei-WuHu line, and to increase in thenorthern part of the line. The content tends to decrease among major soil types following theorder: shajiang dark soil, cultivated meadow soil, limestone soil, yellow-brown earth, paddy soil,stony soil, red earth, and purple soil. The content was found to increase as soil pH rises. Thepossibility of silicon deficiency is higher in acidic soil for growing rice.