晋南南部蔬菜土壤钙含量状况及原因分析

Analysis of Calcium Content of Vegetable Soil in the South of jinnan Area

对晋南南部300个蔬菜土壤样品的分析研究结果表明:蔬菜土壤钙含量比大田土壤钙含量低1.52g/kg;保护地蔬菜土壤钙含量比露地蔬菜土壤钙含量低1.47g/kg;保护地蔬菜土壤钙含量基本上随着土壤深度的增加而增加,钙含量最高层为50～100cm,而露地蔬菜土壤钙含量在不同土层间的变化没有规律;无论是保护地蔬菜,还是露地蔬菜土壤钙含量均随着种植年限的增加而降低。土壤有机质含量与土壤钙含量呈明显的负相关;土壤PH值与土壤钙含量呈显著的正相关;蔬菜产量与土壤钙含量之间呈显著的负相关。影响土壤钙含量变化的主要原因是随着蔬菜产量的增加,从土壤中携带出的钙量相对较多,含钙肥料使用量减少及土壤有机质的提高和土壤PH值的下降。

The analysis of 300 vegetable soil samples in the south of jinnan shows that: the calcium content of vegetable soil is lower than the calcium content of field soil by 1.529g/kg;the calcium content of sheltered ground vegetable soil is lower than of open ground by 1.479/kg;the calcium content of sheltered ground vegetable soil increases along with the increase of soil depth,but the calcium content s change has no rule.There is negative correlation between organic matter content and calcium content;there is p...