期刊论文

Yan, W.D.

中文

生态学报

1000-0933

2015

35

22

7543-7552

10.5846/stxb201403060386

林业公益性行业科研专项（201404316） 湖南省高等学校科学研究项目（12C0457）

本校为第一且通讯机构

为了研究中南丘陵区林-稻系统镉的迁移规律,2012年5月下旬至9月上旬(中稻稻季)在湘北汩罗市桃林林场选择两种类型的林-稻复合生态系统针对降水、地表径流、山塘水、稻田水及其中镉含量用收支平衡法进行了原位动态研究。结果表明,(1)以降水形式从区域外输入的镉是湘北地域地表系统主要的外来镉源,镉的输入主要集中在稻季的早期;(2)镉以雨水形式输入丘陵林-稻系统后,53%被林地截留,7.5%累积于山塘,11.6%存留于稻田,其余28.9%以稻田水和稻草、谷粒的形式输出林-稻系统;(3)不同林-稻系统比较,混-稻系统对外源镉的固持功能最强,松-稻系统其次,对照系统最弱,其原因在于各系统间岗地森林郁闭度存在差异...

Cadmium (Cd) and its compounds are highly toxic to living organisms and are an environmental health hazard. Rice plants usually accumulate more Cd than other crops; therefore, serious concerns have been raised about human health risks resulting from food webs through Cd-contaminated rice paddy soils since rice is a staple food source for many Asian countries such as China and India. In hilly regions of southern China, rice plants are often cultivated near forests in a forest-rice agroforestry system, where the forests often occupy the upper par...