摘要
研究收集了湖北省不同母质发育的水稻土共５０个，测定与统计结果表明，水稻土中有效硅的含量主要取决于成土母质。其顺序为：石灰岩＞灰紫红色砂页岩＞近代河流冲积物和湖积物（Ｑ４）＞第四纪红色粘土（Ｑ３、Ｑ２）＞花岗片麻岩＞砂页岩。研究发现，水稻土有效硅的含量与土壤ｐＨ呈极显著正相关，可用于粗略指示土壤供硅能力。根据母质和ｐＨ特征判断，湖北省缺硅水稻土约占水稻土总面积的５０％。
A total of 50 paddy soil samples which developed from different parent materials in Hubei Province were collected and tested.The statistic results show that the content changes of available Si in paddy soil are mainly dependent on the parent materials in which the sequence of content is limestone>red-purplish sandy shale with CaCO3>alluvium and lacustrne deposits>quaternary period red caly>granitic gneiss>sandy shale.The positive relationship between available Si and the soil pH value was found in the research with a remarkable level,and thus can be used to indicate the Si supply capacity of the paddy soil roughly.According to the characteristics of both soil parent materials and the pH value,it can be said that about 50% of all the paddy soils in Hubei Province has avaiable silicon below the critical level,in toct,with available silicon(SiO2)100 mg/kg.In this paper,the distribution law of paddy soils having different levels of available silicon is given,and several topics around the application of silicate fertilizers are discussed.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1995年第4期363-368,共6页
Journal of Huazhong Agricultural University
关键词
水稻土
硅
土壤母质
PH效应
available silicon of paddy soils
soil parent material
pH effect
rice production
