本文選題：土壤　切入點(diǎn)：沉積物　出處：《西南林業(yè)大學(xué)學(xué)報(自然科學(xué))》2017年05期 　論文類型：期刊論文

【摘要】：以珠江上游南盤江流域?yàn)檠芯繀^(qū),測定農(nóng)田及非農(nóng)田土壤、河流沉積物有機(jī)元素(C、H、N、S、O)的含量,探討有機(jī)元素的多介質(zhì)環(huán)境行為。結(jié)果表明:研究區(qū)農(nóng)田土壤C、N、S的含量顯著高于非農(nóng)田土壤,H、O的含量在2種土壤中差異不明顯。農(nóng)田土壤相對較高的S含量和較低的C/N和N/S值,將最大限度地減少S缺乏。河流沉積物多數(shù)樣點(diǎn)的有機(jī)指數(shù)均達(dá)到Ⅳ級(0.50),處于有機(jī)污染狀態(tài)。沉積物與農(nóng)田和非農(nóng)田土壤C含量正相關(guān),但不顯著,而沉積物與農(nóng)田土壤N含量顯著相關(guān),沉積物與非農(nóng)田土壤中的有機(jī)物質(zhì)來源存在較大差異。
[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，

本文編號：1602031