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| Shifts in soil bacterial communities induced by the controlled-release fertilizer coatings |
| PAN Pan1, 2*, JIANG Hui-min2*, ZHANG Jian-feng2, YANG Jun-cheng2, LI Shu-shan2, LIU Lian2, ZHANG Shui-qin2, LEI Mei1 |
1 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, P.R.China
2 Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China |
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Abstract Coated controlled-release fertilizers (CRFs) have been widely applied in agriculture due to their increased efficiency. However, the widespread and a lot of coated CRFs application may leave undesired coating residues in the soil due to their slow degradation. Limited information is available on the effects of substantial residual coatings on the soil bacterial community. By adding 0, 5, 10, 20, and 50 times quantities of residual coating from conventional application amount of resin and water-soluble coated CRFs, we studied the responses of soil properties and bacterial community composition to these two residual coatings in black soil. The results showed that the resin and water-soluble coatings did not essentially alter the properties of black soil or cause dramatic changes to bacterial diversity within the test concentration range. The residual resin and water-soluble coatings also did not distinctly alter the relative abundance of the top ten bacteria at phylum level. Heatmap results suggested that the treatments were basically clustered into two groups by concentration rather than types of coating material. Pearson correlation analysis showed that the Simpson’s diversity index of the bacterial community was significantly correlated with microbial biomass carbon (MBC, r=0.394, P<0.05), and the richness index abundance-based coverage estimator (ACE) of the bacterial community was significantly correlated with microbial biomass nitrogen (MBN, r=0.407, P<0.05). Overall, results of this study suggested that substantial residual resin and water-soluble coatings with 0–50 times quantities of residual coating from conventional application amount of coated CRFs did not generate obviously negative impacts on the bacterial community in black soil.
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Received: 23 November 2015
Accepted:
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| Fund: This study was supported by the International Scientific and Technological Cooperation Projects of China (2015DFA20790), the National Natural Science Foundation of China (21577172, 41501322), and the National Basic Research Program (973 program) of China (2013CB127406). |
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Corresponding Authors:
ZHANG Jian-feng, Tel: +86-10-82106203, E-mail: zhangjianfeng@caas.cn; YANG Jun-cheng, Tel: +86-10-82106203, E-mail: yangjuncheng@caas.cn
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| About author: PAN Pan, E-mail: ppan2528@163.com;
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Cite this article:
PAN Pan, JIANG Hui-min, ZHANG Jian-feng, YANG Jun-cheng, LI Shu-shan, LIU Lian, ZHANG Shuiqin, LEI Mei.
2016.
Shifts in soil bacterial communities induced by the controlled-release fertilizer coatings. Journal of Integrative Agriculture, 15(12): 2855-2864.
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