论文部分内容阅读
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。
By collecting 9 parent materials, such as J2s, Jurassic Suining Formation (J3s), Jurassic Penglaizhen Formation (J3p) and Cretaceous Jiaoshu Formation (K2j) in Yucheng District, Sichuan Province, A total of 55 cultivated soils samples were collected and analyzed for soil properties. The results show that the cultivated soils in purple sandstone of Cretaceous Jiaoguan Formation have higher content of arable land, lower pH and nutrient content The contents of total potassium in the cultivated soils of Tertiary and Cretaceous irrigation groups were higher than those of other parent materials. The cultivated soils in developed alluvial lands of Qingyi River had a higher content of total phosphorus and available A Phosphorus is the highest in the Quaternary glacial sediments, and has the lowest soil pH, high clay content, soil organic matter and total nitrogen, and available nitrogen in cultivated soil in Quaternary glacial sediments.