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研究分析了宁波市辖区(江北、镇海、北仑)水稻土耕层中的有效Si、Ca、Mg、Zn、Cu含量及其影响因素。结果表明,研究区内土壤有效硅、有效钙、有效镁、有效锌和有效铜均属中等变异强度,变异系数介于27.6%~71.1%,有明显缺硅、缺铜现象。相关分析表明,各元素有效含量与土壤有机质含量呈一定正相关性;有效硅、有效钙、有效镁与土壤pH呈极显著正相关性,有效锌和有效铜与土壤pH呈一定负相关性。因此,在一定程度上,土壤有机质和pH水平可以反映出有效Si、Ca、Mg、Zn、Cu含量的丰缺程度。
The contents of available Si, Ca, Mg, Zn, Cu and their influencing factors in paddy soil in Ningbo area (Jiangbei, Zhenhai and Beilun) were studied and analyzed. The results showed that soil available silicon, available calcium, available magnesium, available zinc and available copper in the study area all belonged to medium variation intensity with a coefficient of variation ranging from 27.6% to 71.1%, with obvious lack of silicon and copper deficiency. Correlation analysis showed that there was a positive correlation between the effective content of each element and soil organic matter content. There was a significant positive correlation between available silicon, available calcium and available magnesium and soil pH. There was a negative correlation between available zinc and available copper and soil pH. Therefore, to a certain extent, soil organic matter and pH levels can reflect the abundance and deficiency of available Si, Ca, Mg, Zn and Cu contents.