摘要
本研究通过分析贵州毕节植烟区不施改良剂(CK),施用秸秆(T1)、多孔改良剂(T2)、70%多孔改良剂+30%竹炭(T3)4种处理不同土层深度土壤重金属含量,评价了植烟区重金属Cr、Cd、Pb的含量水平,探讨了施用多孔改良剂对研究区土壤中重金属Cr、Cd、Pb含量及其有效性的影响。结果表明,研究区土壤重金属Cr、Cd、Pb含量均低于国家二级土壤标准,土壤处于清洁状态。不同土壤改良剂在改善土壤理化性状的同时还能显著降低土壤全Cr和Pb的有效性。在不同改良剂处理中,以T3处理的效果最好,土壤全Cr和有效Pb降幅分别为26.4%和17.2%。毕节烟区使用多孔物理结构改良剂不会增加土壤Cd、Pb的重金属风险,反而降低了土壤全Cr和有效Pb的含量,实现板结土壤改良和重金属有效性降低的双重目标。
In order to explore the effects of porous amendments on the contents of heavy metals (Cr, Cd and Pb) in flue-cured tobacco fields in Bijie City of Guizhou Province, a field experiment was conducted and four treatments were designed, i.e., CK (No amendment), T1 (maize straw incorporation), T2 (porous soil amendment) and T3 (70% T2 and 30% bamboo charcoal). The results showed that soil Cr, Cd and Pb contents in the study area were lower than the 2^nd Grade of National Soil Environmental Standard, which indicated the soils are safe and clean. Different soil amendments not only improved soil physiochemical properties, but can also significantly reduced Cr and the availability of soil Pb. Among different amendments, T3 treatment had the best effect, and the soil Cr and available Pb decreased by 26.4% and 17.2% respectively. The use of porous physical structure amendments in Bijie tobacco planting area didn’t increase the risk of heavy metals of soil Cd and Pb, but reduced the content of soil available Pb, thus, could archive the dual goals in reducing soil compaction and heavy metal availability.
作者
黄化刚
刘世碧
班国军
陈垚
夏中文
张庆
王美艳
徐胜祥
孙维侠
史学正
曹志洪
HUANG Huagang;LIU Shibi;BAN Guojun;CHEN Yao;XIA Zhongwen;ZHANG Qing;WANG Meiyan;XU Shengxiang;SUN Weixia;SHI Xuezheng;CAO Zhihong(Crop Science of Post-doctoral Research Stations, College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China;Bijie Branch Company, Guizhou Tobacco Company, Bijie, Guizhou 551700, China;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China)
出处
《土壤》
CAS
CSCD
北大核心
2019年第2期346-351,共6页
Soils
基金
贵州省烟草公司毕节市公司科技专项(毕节合2015-02
省市院合2015-06)
中国烟草总公司贵州省公司科技项目(201703)
中国博士后科学基金面上项目(2015M572017)
贵州省科学技术基金项目(黔科合J字[2013]2193号)资助
关键词
土壤改良剂
烤烟
土壤性状
重金属
Soil amendments
Flue-cured tobacco
Soil properties
Soil heavy metal
