武汉市郊水稻田土壤有效硅、全硫丰缺状况及土壤性质研究

Study on Available Silicon,Total Sulfur Deficiency and Soil Properties of Paddy Soil in Wuhan Suburb

水稻田土壤质地、酸碱度以及硅、硫等营养元素含量对水稻的质量和产量有着重要的影响,因此对武汉市郊稻田不同地区土壤质地、pH值和土壤中的有效硅、全硫含量进行了测定。实验结果表明:武汉市郊稻田土壤质地为沙壤土,pH基本呈中性,不同深度土壤中有效硅和全硫含量不同。在一定的深度范围内(0~30 cm),随着深度的增加,有效硅、全硫含量有所增加。其中有效硅含量均大于2 000 mg/kg,超过了土壤含有效硅含量的范围;土壤中全硫含量均低于150 mg/kg,说明该土壤容易发生缺硫现象。这一研究结果为指导该地区水稻田土壤合理施肥提供理论依据。

It is important effect of paddy soil texture, pH, silicon and sulfur on the yield and quality of rice. In different areas of Wuhan suburb, the soil texture, pH value, the soil available silicon and sulfur content were determined. The results showed that the soil texture of paddy soil in Wuhan suburb was sandy loam, pH was basically neutral, and the contents of available silicon and total sulfur in different depth soil were different. In a certain depth range(0~30 cm),with the increase of depth,the effective silicon and total sulfur content increased. The content of available silicon was more than 2 000 mg/kg,which exceeded the range of soil available silicon content. The content of total sulfur in soil was lower than 150 mg/kg, which indicated that the soil was prone to sulfur deficiency. The results provided a theoretical basis for the rational fertilization of paddy soils in the region.