江西省耕地土壤有效硅含量调查研究

对江西省１０ 种主要母质的４９７ 个农田土样进行分析，结果表明，耕层土壤有效硅（ Ｓｉ Ｏ２） 平均含量为６０ ．０ ｍｇ／ｋｇ ，含量低于１００ ｍｇ／ｋｇ 的土样占８３ ．５ ％ ，低于５０ ｍｇ／ｋｇ 的土样占６４ ．４ ％ 。水稻土缺硅面积占９１ ．５ ％ 。地区分布特点是南低北高，东低西高。土壤有效硅含量与成土母质和复种制度有密切的关系，与土壤ｐ Ｈ 值和土壤有机质含量呈显著正相关，但与土壤全 Ｎ、速效 Ｎ、 Ｐ、 Ｋ 含量无相关性

Investigation of Available Silicon Content in Cultivated Soil in Jiangxi Province

The available silicon content of 497 farmland soil samples developed from ten main parent materials in Jiangxi was determined. The results indicated that available silicon content of cultivated soil averaged 60.0mg/kg, and there were 83.5% of total soil samples whose SiO-2 content was less than 100mg/kg,and 64.4% of total soil samples whose SiO-2 content was less than 50 mg/kg. The area of silicon deficiency made up 91.5% of total paddy soil. Regional distribution characteristic of soil available silicon content was low in south,high in north,low in east and high in west. There was a close relationship between soil available silicon content and parent materials or cropping pattern,a significant positive correlation between soil available silicon content and pH or organic matter of soil, but not correlation between soil available silicon content and soil total N, available N,available P or available K content.;