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对耕层土壤的粘粒进行X 射线衍射分析结果表明,无论是10 年不施钾或是10 年连续施钾,同一土壤的粘土矿物组成表现出相同的变化趋势:麻砂泥田粘土矿物组成中,水云母含量下降,1-4 nm 矿物含量相应上升,类型由以蛭石为主转变为以1-4 nm 过渡矿物为主,且1-4 nm 过渡矿物的热稳定性有所增强,这主要是由于土壤钾、镁等营养元素长期“入不敷出”所致;白散泥田土壤粘土矿物组成变化不明显;灰油砂土粘粒中,水云母含量上升,1-4 nm 矿物相应下降,这可能主要是粗粒云母类矿物在表层风化的结果。
The results of X-ray diffraction analysis of clay in the topsoil show that the clay mineral composition of the same soil shows the same trend no matter whether potassium is applied for 10 years or potassium is applied continuously for 10 years: clay mineral composition , The content of hydrous mica decreased and the content of minerals at 1-4 nm increased correspondingly. The type mainly changed from vermiculite to 1-4 nm transitional minerals, and the thermal stability of 1-4 nm transition minerals increased Mainly due to the long-term “deficits in excrement” of nutrients such as potassium and magnesium in the soil. The composition of clay minerals in the white sand and muddy soil did not change obviously. In the clay of the oil-sand, the hydrous mica content increased and the 1-4 nm mineral decreased correspondingly It may be mainly the result of the weathering of coarse mica minerals on the surface.