Effects of Continuous Biochar Returning on Nutrients of Soda Saline-Alkali Paddy Soil and Fungal Community Structure

LI Hongyu; ZHANG Gongliang; FAN Mingyu; ZHENG Guiping; Lü Yandong

doi:10.13870/j.cnki.stbcxb.2020.06.048

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Effects of Continuous Biochar Returning on Nutrients of Soda Saline-Alkali Paddy Soil and Fungal Community Structure

更新时间：2025-03-12

- Effects of Continuous Biochar Returning on Nutrients of Soda Saline-Alkali Paddy Soil and Fungal Community Structure
- Vol. 34, Issue 6, Pages: 345-351(2020)
- 作者机构：
  
  黑龙江八一农垦大学农学院, 黑龙江省现代农业栽培技术与作物种质改良重点实验室,黑龙江,大庆,163000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.06.048
  CLC： S156
- Published：2020
- 稿件说明：
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LI Hongyu, ZHANG Gongliang, FAN Mingyu, et al. Effects of Continuous Biochar Returning on Nutrients of Soda Saline-Alkali Paddy Soil and Fungal Community Structure[J]. 2020, 34(6): 345-351.
DOI：

LI Hongyu, ZHANG Gongliang, FAN Mingyu, et al. Effects of Continuous Biochar Returning on Nutrients of Soda Saline-Alkali Paddy Soil and Fungal Community Structure[J]. 2020, 34(6): 345-351. DOI： 10.13870/j.cnki.stbcxb.2020.06.048.

摘要

以苏打盐碱土为供试土壤，设置0，3.0，7.5，12.0，16.5 t/hm2 5个梯度生物炭还田量，通过盆栽试验研究不同量生物炭连续多年还田对苏打盐碱水稻土养分及真菌群落结构的影响。结果表明：（1）不同量生物炭还田后，提高了土壤pH、有机质、速效钾、有效磷和全磷含量，土壤全氮和全钾含量呈现先增加后降低的趋势，对盐碱土起到了改良的效果。（2） Illumina MiSeq测序结果表明，还田量为7.5 t/hm2时，Aphelidiomycota、担子菌门以及链格孢属的相对丰度显著高于对照；还田量为12.0 t/hm2时，子囊菌门、毛霉亚门以及被孢霉属的相对丰度显著高于对照，相关分析显示土壤理化特性与菌门和菌属的相对丰度关系密切，表明生物炭通过调节土壤的理化特性，从而影响真菌的相对丰度。（3）生物炭还田处理对土壤真菌α多样性影响不显著，对土壤真菌群落结构产生一定的影响，其中高生物炭还田量处理对其影响更为显著。进一步利用冗余分析（RDA）研究影响群落结构变化的环境因子表明，全钾含量对群落结构影响最大。

Abstract

With soda saline-alkali paddy soil as the test soil

5 treatments of 0

3.0

7.5

12.0

16.5 t /hm2 were set to investigate the effects of continuous biochar returning on nutrients of soda saline-Alkali paddy soil and fungal community structure through pot experiment. The results showed that: (1) The soil pH

organic matter

available potassium

available phosphorus and total phosphorus were increased and the total nitrogen and total potassium showed a trend of increasing at first and then decreasing with the different amounts of biochar returning

which amended the saline-alkali soil. (2) Illumina MiSeq sequencing results showed that relative abundance of Aphelidiomycota

Basidiomycota and Alternaria under 7.5 t/hm2 was significantly higher than that of control and the relative abundance of Ascomycota

Mucoromycota and Mortierella under 12.0 t/hm2was significantly higher than that of control. Correlation analysis indicated that soil physicochemical characteristics were closely related to the relative abundance of fungal phyla and genus

suggesting that biochar affected the relative abundance of fungi by regulating the physicochemical properties of soil. (3) Biochar returning treatment had little influence on fungal α diversity

while had a certain impact on the structure of soil fungal community

especially at a higher biochar returning level. Redundancy analysis (RDA) that further analyzed the environmental factors affecting the change of community structure

indicated that the total potassium content had the greatest impact on the community structure.

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