摘要
通过对长期氮磷化肥与有机肥配施0～40cm土壤及2013年玉米籽粒中Cd含量的测定，研究了长期施肥条件下褐土Cd的盈亏状况、年际变化特征及对玉米籽粒Cd含量的影响。结果表明，受多种因素影响，不同施肥处理土壤Cd盈亏状况表现不一，土壤Cd含量总体呈升高趋势，磷肥和有机肥对褐土中Cd含量的影响较大，但施肥对褐土Cd含量的影响不显著；2013年秋季不同施肥处理土壤Cd含量均未超过国家土壤环境质量二级标准；2013年玉米籽粒中Cd含量低于国家限量标准。因此，应加强对磷肥和有机肥的管理，降低施肥导致的Cd污染风险。
Based on the experiment by 22 years of nitrogen and phosphorus and organic fertilizations, the balance and characteristics interannual of long-term fertilization on Cd contents of cinnamon and corn grain were studied. The results showed that it was influenced by many factors, different treatment of soil Cd profit and loss status in mixed; the soil Cd content showed the rise trend; But the content of heavy metal element had not exceeded the second grade criteria of the national standard for environmental quality by 2013. Different fertilizer treatment on Cd content was not significant; Cd content in cinnamon soil was mainly affected by phosphate and organic fertilizers. Cd in corn grain is safe. We should strengthen the management of phosphate fertilizer and organic fertilizer, there by reducing pollution risks.
出处
《山西农业科学》
2014年第11期1188-1191,共4页
Journal of Shanxi Agricultural Sciences
基金
国家公益性行业(农业)科研专项(201203030-08-03)
山西省留学人员管理委员会办公室项目(2013-149)
关键词
长期试验
褐土
重金属
春玉米
long-term exeperiment
cinnamon soil
heavy metals
spring corn
