四川雨城区主要土壤母质上的耕地土壤性质变异研究

通过在四川省雨城区采集侏罗系沙溪庙组(J2s)、侏罗系遂宁组(J3s)、侏罗系蓬莱镇组(J3p)、白垩系夹关组(K2j)等地层9种母质上发育的耕地土壤样品共55个,并进行土壤性质测定及对比分析,结果表明:白垩系夹关组紫色砂岩上发育的耕地土壤较其他紫色母岩上发育的耕地砂粒含量高,pH低,养分含量低;第三系名山群及白垩系灌口组上发育的耕地土壤具有较其他母质高的土壤全钾;青衣江灰色河流冲积物发育的耕地土壤较其他母质发育的耕地土壤全磷和速效磷含量高,第四系冰水沉积物上发育的耕地土壤pH最低,粘粒含量高,土壤有机质及全氮、速效氮较其他母质发育的耕地土壤高。

Changes of Cropland Soil Properties Derived from Different Parent Materials

Investigation and analysis were conducted to study the cropland soil property derived from formation of J_(2s)、J_(3s)、J_(3p)、K_(2j) 、K_(2g)、K_(1-2)~(mn)、Q_2~(fgL) and Q_4~(aL).The result shows that the content of sand is high, pH is low and the nutrient is deficient in the soil derived from K_(2g). The total K is high in the cropland soil derived from K_2-E.The total P and available P are high in the cropland soil derived from alluvial deposit of the Qingyi river .The content of clay is high ,but the pH is low.The OM, total N and available N in the cropland soil derived from Q_2~(fgL) is higher than those from others.