Impact of prolonged rice cultivation on coupling relationship among C, Fe, and Fe-reducing bacteria over a 1000-year paddy soil chronosequence
Impact of prolonged rice cultivation on coupling relationship among C, Fe, and Fe-reducing bacteria over a 1000-year paddy soil chronosequence
复制标题
1000年水稻土年代序列中长期水稻种植对C、Fe和铁还原菌耦合关系的影响
DOI：
10.1007/s00374-019-01370-x
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发表时间：
2019-06
影响因子：
6.5
通讯作者：
Wu Jinshui
中科院分区：
文献类型：
--
作者：
Liu Yalong;Dong Yuqi;Ge Tida;Hussain Qaiser;Wang Ping;Wang Jingkuan;Li Yong;Guggenberger Georg;Wu Jinshui
长期土壤时间序列是研究成土作用和元素耦合过程的重要模型系统。在这里，我们评估了水稻土中大约50至1000年的碳、铁和铁还原细菌（厌氧杆菌、地杆菌和希瓦氏菌）之间的耦合关系。时间序列的土壤起源于几乎相同的景观和气候条件下的潮汐沼泽。在1000年的水稻栽培过程中，表层（0 ~ 20 cm）土壤有机碳（SOC）含量从10.4 g kg−1增加到21.8 g kg−1。相比之下，在水稻种植的前50年，总铁含量从59.6 g kg - 1下降到45.1 g kg - 1，然后以0.004 g kg - 1土壤年- 1的低速率进一步下降（相当于10 kg ha - 1土壤年- 1）。随着成土时间的延长，有机络合铁氧化物（Fep）从219 mg g−1增加到642 mg g−1，而游离总铁氧化物（Fed）和无定形铁氧化物（Feo）在土壤发育早期下降，后期缓慢积累。在连续水稻栽培条件下，厌氧菌和地菌的基因拷贝数分别从4.6 × 105和3.6 × 106copies g−1增加到3.8 × 107和3.6 × 107copies g−1，而shewanellagene丰度则从4.5 × 105和9.3 × 104copies g−1逐渐减少。利用结构方程模型（SEM）分析了水稻时间序列前300年及以后，C、Fe和Fe还原菌之间的耦合关系。总体而言，所有的铁还原菌并没有表现出一致的变异。随着微生物群落和氧化铁组分的稳定，在1000年的水稻土发育过程中，微生物介导的C和Fe之间的异化耦合关系变得简单。
Long-term soil chronosequences are valuable model systems for investigating pedogenesis and investigating the process of element coupling. Here, we assessed the coupling relationships among C, Fe, and Fe-reducing bacteria (Anaeromyxobacter,Geobacter, andShewanella) in a paddy soil chronosequence of approximately 50 to 1000 years. Soils of the chronosequence originated from tidal marsh under nearly identical landscape and climate conditions. During 1000 years of rice cultivation, soil organic carbon (SOC) contents in surface horizons (0–20 cm) increased from 10.4 to 21.8 g kg−1. In contrast, total Fe contents declined from 59.6 to 45.1 g kg−1during the initial 50 years of paddy rice cultivation and then further decreased at a low rate of 0.004 g kg−1soil year−1(equivalent to 10 kg ha−1soil year−1). Organically complexed Fe oxides (Fep) increased from 219 to 642 mg g−1with increasing time of pedogenesis, but free total Fe oxides (Fed) and amorphous Fe oxides (Feo) declined at early stage of soil development, followed by a slow accumulation at later stages of the chronosequence. Gene copy numbers ofAnaeromyxobacterandGeobacterincreased from 4.6 × 105and 3.6 × 106copies g−1to 3.8 × 107and 3.6 × 107copies g−1dry soil with continuous paddy rice cultivation, while concurrentlyShewanellagene abundance decreased gradually from 4.5 × 105to 9.3 × 104copies g−1dry soil. Using structural equation modeling (SEM), different coupling relationships were observed among C, Fe, and Fe-reducing bacteria for the first 300 years of paddy chronosequence and thereafter. Overall, all Fe-reducing bacteria did not show consistent variation. With the stable microbial community and iron oxide fractions, the microbially mediated dissimilatory coupling relationship between C and Fe becomes simple during 1000 years of paddy soil development.
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DOI：
10.5860/choice.31-3799
发表时间：
2013-01
期刊：
--
影响因子：
--
作者：
S. Pal
通讯作者：
S. Pal
影响因子：
6.5
作者：
L. Wissing;A. Kölbl;W. Häusler;P. Schad;Z. Cao;I. Kögel‐Knabner
通讯作者：
L. Wissing;A. Kölbl;W. Häusler;P. Schad;Z. Cao;I. Kögel‐Knabner
DOI：
10.1002/047086303x
发表时间：
2004-03
期刊：
--
影响因子：
--
作者：
G. Kirk
通讯作者：
G. Kirk
影响因子：
5.7
作者：
Jian-min Zhou;Z. Dang;M. Cai;Cong-Qiang Liu
通讯作者：
Jian-min Zhou;Z. Dang;M. Cai;Cong-Qiang Liu
影响因子：
6.5
作者：
Chen, Junhui;Chen, De;Sun, Xuan
通讯作者：
Sun, Xuan