连续3年施用磷石膏对红壤理化性质的影响

发布时间：2018-03-20 09:12

本文选题：红壤　切入点：磷石膏　出处：《西南农业学报》2016年09期 　论文类型：期刊论文

【摘要】：以已进行3年的甘蔗磷石膏定位试验为背景,研究了3年里红壤上施用磷石膏对土壤理化性质和重金属累积的影响。结果表明:与对照(仅施用氮磷钾)比较,施用磷石膏后土壤p H值、土壤总孔隙度明显下降,容重提高;土壤速效磷、有效硫、有效硅、Ca~(2+)、Al~(3+)含量显著增加;有效氮、钾有所提高;施用PG后,土壤盐基饱和度不同程度降低,降幅为1.17%~2.98%,平均降幅2.41%;而交换性钙、交换性总酸、交换性铝、阳离子交换量含量不同程度的增加。与对照比较,交换性钙、阳离子交换量分别增加45.57%和39.92%,交换性总酸和交换性铝分别增加1.74和2.84倍;土壤残留砷、镉、铬、汞、铅低于国家Ⅲ类土壤规定值。研究结果为磷石膏在红壤上的利用提供了科学依据。
[Abstract]:The effects of phosphogypsum application on soil physical and chemical properties and accumulation of heavy metals in red soil during the past 3 years were studied. The results showed that the effect of phosphogypsum application on soil physical and chemical properties and accumulation of heavy metals in red soil was compared with that of control (N, P, K). After application of phosphogypsum, the total porosity and bulk density of the soil decreased obviously, and the available phosphorus, available sulfur, available silicon, Caanadine 2 and Alnion 3) increased significantly, the available nitrogen and potassium increased, and after PG application, the content of available phosphorus and available sulfur increased significantly. The content of exchangeable calcium, exchangeable total acid, exchangeable aluminum, and cation exchange capacity increased in varying degrees, with a decrease of 1.17 and 2.98, respectively. The cation exchange capacity increased by 45.57% and 39.92, the exchangeable total acid and exchangeable aluminum increased by 1.74 and 2.84.The residual arsenic, cadmium, chromium, mercury in soil, The results provided scientific basis for the utilization of phosphogypsum in red soil.
【作者单位】：云南农业大学资源与环境学院;云南云天化以化磷业研究技术有限公司;云南农业大学科技处;中国西南野生生物种质资源库;云南农业大学农学与生物技术学院;云南省化工研究院;
【基金】：云天化集团-云南农业大学联合基金(YF2011-011)
【分类号】：S143

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