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Open AccessArticle

Effect of Soybean and Maize Rotation on Soil Microbial Community Structure

by 1,†, 1,†, 1,*, 2, 1 and 1
1
College of Agronomy, Inner Mongolia Agricultural University, No. 275, Xin Jian East Street, Hohhot 010019, China
2
Chifeng Academy of Agricultural and Animal Husbandry Sciences, Song Shan District, Chifeng 024031, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Agronomy 2019, 9(2), 42; https://doi.org/10.3390/agronomy9020042
Received: 29 October 2018 / Revised: 4 January 2019 / Accepted: 5 January 2019 / Published: 22 January 2019
(This article belongs to the Special Issue Environmental and Management Factor Contributions to Maize Yield)
Examining the soil microbiome structure has great significance in terms of exploring the mechanism behind plant growth changes due to maize (Zea mays L.) and soybean (Glycine max Merr.) crop rotation. This study explored the effects of soil microbial community structure after soybean and maize crop rotation by designing nine treatments combining three crop rotations (continuous cropping maize or soybean; and maize after soybean) with three fertility treatments (organic compound fertilizer, chemical fertilizer, or without fertilizer). Soil was sampled to 30 cm depth the second year at approximately the middle of the growing season, and was analyzed for physical, chemical, and phospholipid fatty acid (PLFA) profiles. Bacteria was found to be the predominant component of soil microorganisms, which mainly contained the PLFAs 16:0. Crop rotation with organic compound fertilizer application reduced the percentage of fungi in the soil by 24% compared to continuous maize and soybean with the same fertilizer application. The combination of crop rotation with organic fertilizer can reduce the percentage of fungi/bacteria to the greatest degree. In addition, the content of soil aggregate and organic matter had great influence on Gram-positive bacteria and actinomyces. In conclusion, soybean and maize crop rotation improve the soil nutrient content primarily by influencing the composition of bacterial community, especially the Gram-positive bacteria. View Full-Text
Keywords: crop rotation; maize; soybean; microbial community structure crop rotation; maize; soybean; microbial community structure
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Zhang, P.; Sun, J.; Li, L.; Wang, X.; Li, X.; Qu, J. Effect of Soybean and Maize Rotation on Soil Microbial Community Structure. Agronomy 2019, 9, 42.

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