摘要
采用阳离子交换法制备矿物锌肥。蒙脱石和蛭石对Zn2 + 的等温吸附线呈双“S”型 ,而沸石对Zn2 + 的等温吸附线则呈“Langmuir”型。 3种矿物对Zn2 + 的吸附容量大小顺序为 :蒙脱石 >蛭石 >沸石。盆栽试验结果显示 ,施用锌肥后 ,两造玉米幼苗的生物产量都高于CK(未施用锌肥 ) ,在第一造中蛭石锌的增产量最高 ,而第二造中蒙脱石锌的增产量最高。运用粉晶X射线衍射、红外光谱、差热及热重分析等技术对矿物及矿物锌肥的结构特征进行了研究 ,结果表明 ,蛭石锌可作为速效锌肥 ,而蒙脱石锌则可作为长效缓释锌肥。
Mineral fertilizers were prepared by the cation exchange method. The adsorption isotherms of Zn 2+-adsorbing montmorillonite and vermiculite assume double 'S' shape, while the adsorption isotherms of Zn 2+- adsorbing zeolite are of 'Langmuir' form. The adsorption capacity gradation of three Zn 2+-adsorbing minerals is montmorillonite > vermiculite > zeolite. The result of potted plant shows that the biomass of the second batch of corn applied with zinc fertilizer is better than CK (without application of zinc fertilizer). In the first batch, the biomass of vermiculite-Zn is the best, whereas in the second batch, the biomass of montmorillonite-Zn is the best. XRD, IR, DTA and TG were also used to analyze the crystal structure of minerals and mineral zinc fertilizers. The results reveal that vermiculite-Zn can be used as quick-acting zinc fertilizer, while montmorillonite-Zn can be used as long-acting slowly-released zinc fertilizer.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2001年第4期449-454,共6页
Acta Petrologica et Mineralogica
基金
广东省自然科学基金资助项目 (99416 1
0 0 6 2 3)
