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对太湖平原地区高产的黄泥土型水稻土的全土(<1毫米)及7个粒级(1—0.25,0.25—0.05,0.05—0.01,0.01—0.005,0.005—0.002,0.002—0.001和<0.001毫米)共8个土样,进行测定。结果表明:黄泥土粘粒部分(<0.002毫米)的粘土矿物,主要由水云母、高岭和蒙脱组成。粗粘粒级(0.002—0.001毫米)和细粘粒级(<0.001毫米)中粘土矿物的分配有明显差异;砂粒级(1—0.05毫米)中除了主要的石英外,还含有少量“铁锰砂”,所以该粒级中的SiO_2含量较粉粒级(0.05—0.002毫米)的低,而Fe_2O_3的含量则相反,容积磁化率也较高;可塑性和膨胀性都是在<0.002毫米时才始现。上述特点与作者过去所研究的白土型水稻土类似。但是,与国内外报道的几种旱地土壤的资料有所不同。
The results showed that all the soils (<1 mm) and seven fractions (1-0.25,0.25-0.05,0.05-0.01,0.01-0.005,0.005-0.002,0.002-0.001 and <0.001) of high yielding paddy soil in the Taihu Plain, Mm) a total of 8 soil samples were measured. The results show that the clay minerals of the clay fraction (<0.002 mm) of the yellow mud are composed mainly of mica, kaolinite and montmorillonite. There is a clear difference in the distribution of clay minerals in the coarse-grained (0.002-0.001 mm) and fine-grained (<0.001 mm) grades; in addition to the major quartz in the grit grade (1-0.05 mm) Sand ". Therefore, the content of SiO_2 in the grain size is lower than that of grain size (0.05-0.002mm), while the content of Fe_2O_3 is opposite, and the volume susceptibility is also higher. The plasticity and expansibility are all less than 0.002mm Appeared. The above-mentioned characteristics are similar to the clay-type paddy soil studied by the author in the past. However, the data of several kinds of dryland soil reported at home and abroad are different.