Effect of Long-term Fertilization on Hg Contents of Cinnamon and Corn Grain

doi:10.7668/hbnxb.2015.03.040

Abstract

Abstract: Based on the situation of Hg pollution in the soil,the change rule of Hg element in north sub-humid cinnamon of farmland were studied.The Hg content in the soil surface layer of 0-40 cm and in the corn grain in 2013 of the experiment on 22-year application of nitrogen,phosphorus and organic fertilizers were determined,and the analysis of Hg content in corn grain in 2013,the balance and interannual and depth profile changes of Hg content in cinnamon soil under long-term fertilization were studied.The results showed that the soil Hg content of no fertilizer treatment decreased,others increased;With time running after fertilization the soil Hg content decreased 29.3% -74.2% respectively as compared to the baseline levels;High fertilization may cause the rise of Hg content in soil layer of 20-40 cm.The content of Hg in soil tested in 2013 did not exceed the upper limits of the grade II criteria of the national standard for soil environment;Hg content between treatment in cinnamon soil was not significantly affected by the use of nitrogen,phosphorus and organic fertilizers.Hg content in corn grain analyzed in 2013 were below their respective threshold of the national food safety standard.Long-term nitrogen,phosphorus and organic fertilizers had no sign to show.

Key words: Long-term fertilization, Cinnamon soil, Heavy metals, Spring corn

CLC Number:

S141
S19

LI Yuan-zhen, ZHOU Huai-ping, XIE Wen-yan, YANG Zhen-xing, GUAN Chun-lin. Effect of Long-term Fertilization on Hg Contents of Cinnamon and Corn Grain[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(3): 234-238. doi: 10.7668/hbnxb.2015.03.040.

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