实验室新闻

    科研进展

    实验室公告

    学术活动公告

 
[SCIENCE OF THE TOTAL ENVIRONMENT],卷: 670 页: 1060-1067
 点击数:167次 添加时间:  [关闭] [收藏]

作者:Wang, JJ (Wang, Jingjing) ; Yi, X (Yi, Xiu) ; Cui, J (Cui, Jian) ; Chang, YJ (Chang, Yajun) ; Yao, DR (Yao, Dongrui) ; Zhou, DM (Zhou, Dongmei); Yang, J (Yang, John) ; Zhou, J (Zhou, Jing) ; Chan, A (Chan, Andy) ; Wang, W (Wang, Wei)

 

题目:Nonlinear effects of increasing nitrogen deposition on rice growth and heavy metal uptake in a red soil ecosystem of southeastern China

 

刊物:SCIENCE OF THE TOTAL ENVIRONMENT,卷: 670  页: 1060-1067

DOI: 10.1016/j.scitotenv.2019.03.245

出版年: JUN 20 2019

 

摘要:

With the population growth, urbanization and industrialization, China has become a hotspot of atmospheric deposition nitrogen (ADN), which is a threat to ecosystem and food safety. However, the impacts of increased ADN on rice growth and grain metal content are little studied. Based on previous long-term ADN studies, greenhouse experiment was conducted with four simulated ADN rates of 0, 30, 60 and 90 kg N ha(-1) yr(-1) (CK, N-1, N-2 and N-3 as delta N-15, respectively) to assess rice growth and metal uptake in a red soil ecosystem of southeast China during 2016-2017. Results showed that simulated ADN could promote rice growth and increase yields by 15.68-24.41% (except N-2) and accumulations of cadmium (Cd) or copper (Cu) in organs. However, there was no linear relationship between ADN rate and rice growth or Cd or Cu uptake. The N-15-ADN was mainly accumulated in roots (21.31-67.86%) and grains (2526-4935%), while Cd and Cu were primarily accumulated in roots (78.86-93.44% and 90.00-96.24%, respectively). N-15-ADN and Cd accumulations in roots were significantly different between the two growing seasons (p < 0.05), implying the accumulative effects of ADN. Data also indicated the synergetic effect between accumulations of N-15-ADN and soil Cd and Cu. This study demonstrated that increasing ADN could potentially enhance Cd or Cu uptake in rice grain and threaten rice grain safety. However, related nonlinear mechanism is still needed to be discussed between increasing ADN and rice response in the future. (C) 2019 Elsevier B.V. All rights reserved.

 

 

 


 

版权所有:中国科学院南京土壤研究所 苏ICP备05004320号 地 址:江苏省南京市北京东路71号 邮编:210008 网站管理