珠江上游土壤与沉积物有机元素的含量与分布特征

发布时间：2018-03-12 14:47

  本文选题：土壤　切入点：沉积物　出处：《西南林业大学学报(自然科学)》2017年05期 　论文类型：期刊论文

【摘要】：以珠江上游南盘江流域为研究区,测定农田及非农田土壤、河流沉积物有机元素(C、H、N、S、O)的含量,探讨有机元素的多介质环境行为。结果表明:研究区农田土壤C、N、S的含量显著高于非农田土壤,H、O的含量在2种土壤中差异不明显。农田土壤相对较高的S含量和较低的C/N和N/S值,将最大限度地减少S缺乏。河流沉积物多数样点的有机指数均达到Ⅳ级(0.50),处于有机污染状态。沉积物与农田和非农田土壤C含量正相关,但不显著,而沉积物与农田土壤N含量显著相关,沉积物与非农田土壤中的有机物质来源存在较大差异。
[Abstract]:In this paper, the contents of organic elements in the sediments of farmland and non-farmland soils were determined in the upper reaches of the Pearl River by using the Nanpanjiang River Basin as the study area. The results showed that the contents of C ~ (+) N ~ (+) S in farmland soils were significantly higher than those in non-farmland soils, and there was no significant difference between the two soils. The relative higher S content and lower C / N and N / S values in farmland soils were observed. The organic index of most sampling points of river sediment is up to grade 鈪，

本文编号：1602031