生态环境学报2017，Vol.26Issue(7)：1235-1241,7.DOI:10.16258/j.cnki.1674-5906.2017.07.021
不同施肥措施对双季稻田土壤和大麦植株镉累积的影响
Effects of Long-term Fertilization on Heavy Metal Cd Accumulation in the Surface Soil and Barley Plant of Double-cropping Paddy Rice System
摘要
Abstract
Fertilization is the key factors that affecting heavy metal Cd accumulation in paddy soil and crop plant. It is necessary to assess the variation characteristics of heavy metal Cd accumulation in paddy soil and crop plant under long-term fertilization managements, which helps rational fertilization and healthy soils in the double-cropping rice area. Therefore, our objective was to explore the heavy metal Cd accumulation in paddy soil and barley plant at barley (Hordaum vulgare L.) mature stage with different long-term fertilizer managements in the double-cropping rice system. we analyzed the Cd accumulation in the surface soil and barley plant with mineral fertilizer alone (MF), rice residues plus mineral fertilizer (RF), 30% organic matter and 70% mineral fertilizer (LOM), 60% organic matter and 40% mineral fertilizer (HOM), and without fertilizer (CK) basis on 31 years long-term fertilizer experiment. The results showed that the soil total and available content of Cd were significantly increased by 36.67%, 80.91% and 141.86%, 79.07% with HOM and LOM treatments, respectively, compared with the CK. The accumulation and bio-content factor (BCF) of Cd in different parts of barley plant were the highest in root, followed by leaves and stems, and the lowest in grain. Meanwhile, the Cd content in root, leaves and grain of barley plant were increased 0.270, 0.235, 0.039 mg?kg-1 with LOM treatment, and the Cd content in stem of barley plant were also increased 0.076 mg?kg-1 with RF, respectively, compared with the CK. The soil Cd individual polluting index (PCd) under different fertilization treatments was varied from 1.100 to 1.990, and the PCd was larger than 1. And the PCd for different fertilizer managements was following as HOM>LOM>CK>MF>RF. Meanwhile, the PCd with LOM and HOM treatments were higher than that of the MF, RF and CK treatments, and there is not significant difference between MF, RF and CK treatments. As a result, long-term application of chemical fertilizer and rice residues incorporation had no obvious effect on the accumulation of Cd in paddy soils, and significant Cd accumulation has occurred as taken the incorporation of organic fertilizer into soils.关键词
大麦/长期施肥/镉(Cd)/秸秆还田Key words
barley/long-term fertilizer/heavy metal Cd/rice residues incorporation分类
资源环境引用本文复制引用
徐一兰,许晓玲,金自力,刘唐兴,程爱武,李永,李益锋,何炜,黄新杰,皮俊..不同施肥措施对双季稻田土壤和大麦植株镉累积的影响[J].生态环境学报,2017,26(7):1235-1241,7.基金项目
湖南省教育厅科学研究项目(16C0939) （16C0939）
湖南省自然科学基金项目(2017JJ3133) （2017JJ3133）
