期刊论文

Cd Balance Analysis of a Typical Rice Paddy System in Central Hunan

Peng, Pei-Qin(pqpeng123@sina.com)

中文

环境科学

0250-3301

2019

40

7

3324-3330

10.13227/j.hjkx.201811175

国家科技支撑计划项目（2015BAD05B02）； 农业部财政部重大专项（农办财函[2016]6号）； 湖南省重点学科建设项目（2006180）；

本校为第一且通讯机构

运用大田定位试验的方法,研究了典型稻田系统Cd污染发展趋势.于2015-11 ~ 2018-11逐月采集大气沉降及灌溉水样,同时多次采集肥料、土壤及水稻样,监测分析样品中Cd含量,研究湘中典型稻田系统Cd输入输出平衡情况.结果表明,稻田系统Cd通过灌溉水、大气沉降和肥料等途径输入,年均输入量为8.735 g·(hm~2·a) ~(- 1),其中大气沉降为主要来源,占总输入的69.15% ~ 82.04%,平均为76.61%,其次是灌溉水占12.62% ~ 23.66%,平均为16.94%,肥料占5.34% ~ 7.19%,平均为6.45%;稻田系统Cd通过地表径流、土壤下渗和水稻地上部分收获途径输出,年均输出量为7.093 g·(hm~2·a) ~(- 1),水稻地上部分收获占总输出的85....

By conducting field positioning experiments, we studied the development trend of Cd pollution in a typical paddy system. The samples of atmospheric deposition and irrigation water were collected monthly from November 2015 to November 2018 during which fertilizer, soil, and rice samples were also collected. The Cd concentration in the samples was monitored and analyzed to conduct research on the balance between Cd inputs and outputs in a typical paddy system in Hunan Province. The results suggest that through irrigation water, atmospheric deposi...