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標題

Three years of biochar amendment alters soil physiochemical properties and fungal community composition in a black soil of northeast China

作者

QinYao,JunjieLiu,ZhenhuaYu,YanshengLi,JianJin,XiaobingLiu,GuanghuaWang

名稱(期刊/節目)

Soil Biology and Biochemistry

期刊期數/節目集數

Volume 110, Pages 56-67

出版單位

ELSEVIER

出版年月日

July 2017

原文摘要

Although biochar amendment has been extensively evaluated as a promising strategy to improve soil quality, most evaluations have been conducted in the laboratory or under short-term field conditions, which restricted us to understand the long-term effects of biochar as a soil amendment. As the residence time of biochar in soils is expected to be hundreds to thousands of years, this study focused on revealing whether biochar addition influences soil physiochemical properties and fungal community composition in a black soil of northeast China over the long term. Biochar was added to the micro-plots at 0%, 2%, 4%, and 8% of the total mass of the top 20 cm of the soil in the spring of 2012, and soil samples were collected seasonally four times in 2014. The results indicate that soil pH, moisture, total C, total N, total P, NO3−-N, available K and the C/N ratio significantly increased but soil bulk density and total K content decreased with biochar addition. The soil fungal abundance determined using quantitative real-time PCR showed that the number of fungal ITS gene copies increased with biochar addition. The soil fungal community composition determined using the Illumina MiSeq sequencing method showed that community diversity was not influenced by biochar addition but the community composition was influenced. The impact of biochar on changes in community composition was not reflected at the phylum level, but at the genus and operational taxonomic units (OTU) levels. The relative abundance of Fusarium decreased, but Guehomyces increased with biochar addition over the first three sampling dates. The relative abundances of several OTUs classified as potential crop pathogens decreased with biochar addition, suggesting that biochar amendment may be beneficial in terms of suppressing the occurrence of crop disease over the long term. In addition, canonical correspondence analysis indicated that fungal community composition was associated with soil parameters such as pH, soil moisture, total C, total N, total K and available K. The changes in these soil characteristics were highly correlated with the amounts of biochar addition, suggesting that the impacts of long-term biochar amendment on the soil fungal community occurred indirectly as a result of the alteration of soil physiochemical properties.

原文摘要簡述

儘管生物炭改良劑已被廣泛評估為改善土壤品質的一種有前途的策略,但大多數評估已在實驗室或短期田間條件下進行,這使我們無法理解生物炭作為土壤改良劑的長期效果。由於生物炭在土壤中的停留時間預計為數百至數千年,因此本研究著重於揭示生物炭的添加是否會長期影響中國東北黑土的土壤理化性質和真菌群落組成。

關鍵字

Biochar; Fungal diversity; Fungal ITS sequence; Illumina MiSeq sequencing; Mollisols

連結

https://doi.org/10.1016/j.soilbio.2017.03.005

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