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Effect of the slag and biochar application on bacterial diversity and community composition of paddy field |
ZHOU Ya-xin1, WANG Xiao-tong1, WANG Guang-lei1, XU Xu-ping1, WANG Wei-qi2,3 |
1. College of Life Science, Fujian Normal University, Fuzhou 350108, China;
2. Institute of Geography, Fujian Normal University, Fuzhou 350007, China;
3. Key Laboratory of Humid Sub-tropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350007, China |
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Abstract This paper took the paddy field in Fuzhou Plain as the experimental base, and explored their effects on the relative abundance, diversity and community composition of soil bacteria in paddy field by setting up control group, slag application group, biochar application group, slag and biochar mixed application group. In the growth period of late rice, the diversity of bacterial community increased under the condition of waste application, compared with the control group, the bacterial diversity index of biochar and slag application group increased by 2.55% and 3.21% respectively. The difference in community structure between the early paddy mixed application group and the early paddy control group was the largest, and the difference between the late paddy biochar application group and the late paddy control group was the largest. The waste application treatment both increased the relative abundance of Bacillus in early paddy soil and decreased the relative abundance of Bacillus in late paddy soil, but the proportion of Bacillus in late paddy was always higher than that in early paddy. Environmental factors also had significant effects on the relative abundance of soil bacteria in paddy fields. Among them, the relative abundance of Bacillus was significantly positively correlated with the pH of paddy soil (P<0.01). Surface wastes can be managed separately during the growing period of late rice, so as to improve soil, improve soil fertility and achieve the effect of increasing yield through increasing microbial diversity. For early rice, deep application of wastes can be tried in the future, and its ecological impact can be explored.
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Received: 15 August 2019
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