Changes in soil properties rather than functional gene abundance control carbon and nitrogen mineralization rates during long-term natural revegetation
Changes in soil properties rather than functional gene abundance control carbon and nitrogen mineralization rates during long-term natural revegetation
复制标题
在长期自然植被恢复过程中，控制碳和氮矿化速率的是土壤性质的变化，而不是功能基因丰度的变化
DOI：
10.1007/s11104-019-04212-9
复制
发表时间：
2019-08
期刊：
影响因子：
4.9
通讯作者：
Zhang Quanfa
中科院分区：
文献类型：
--
作者：
Zhang Kerong;Li Xinshuai;Cheng Xiaoli;Zhang Zhenhua;Zhang Quanfa
背景与目的农业弃耕是生态恢复中应用最广泛的策略之一。自二十世纪中期以来，全世界被遗弃的农田不断扩大，而且今后还会大量增加。农业废弃是否改变了土壤碳（C）和氮（N）矿化基因的丰度，以及这些功能基因是否与C和N矿化速率的改变有关尚不清楚。利用GeoChip 5.0分析了植被演替、土壤特征、土壤微生物群落和功能基因之间的关系。结果农业弃耕后植被演替对土壤C、N矿化速率、微生物生物量和组成、功能基因的数量和丰度有显著影响。土壤C和N矿化率增加了6倍和3倍，分别为沿着农田森林演替梯度。NO3-N、NH 4-N和土壤速效磷是影响C、N矿化基因的重要因子。土壤环境的变化（即，土壤水分、阳离子交换容量和C/P比），植物来源的基质（即，土壤有机碳和氮），和土壤微生物组成（即，真菌/细菌的比例，数量的革兰氏阴性细菌，放线菌，和丛枝菌根真菌），而不是丰富的功能基因参与矿化过程中，控制土壤C和N矿化率沿着长期植被演替gradient. ConclusionsAbrounding农田自然演替可以促进土壤C和N过程的恢复，改变土壤微生物组成和功能基因。微生物功能基因的丰度在调节土壤C和N矿化速率方面不如以前预期的重要。
Background and aimsAgricultural abandonment has been taken as one of the most widely used strategies for ecological restoration. Abandoned croplands expanded worldwide since the middle of the twentieth century and will increase considerably in the future. Whether agricultural abandonment alters the abundances of soil carbon (C) and nitrogen (N) mineralization genes, and whether these functional genes are linked to alterations in C and N mineralization rates remain unknown.MethodsWe took advantage of a well-established chronosequence of nature restoration sites on abandoned croplands which represent a century of vegetation succession in China’s Qinling Mountains, to determine soil C and N mineralization rates, and their relationships with vegetation succession, edaphic characteristics, soil microbial communities, and functional genes based on GeoChip 5.0.ResultsWe found that soil C and N mineralization rates, microbial biomass and composition, and the number and abundances of functional genes were significantly affected by vegetation succession following agricultural abandonment. Soil C and N mineralization rates increased by sixfold and threefold, respectively, along the cropland to forest successional gradient. The NO3-N, NH4-N and soil available phosphorus (P) concentrations were important factors associated with the C and N mineralization genes. The shifts in edaphic environments (i.e., soil moisture, cation exchange capacity, and C/P ratio), vegetation-derived substrates (i.e., soil organic C and N), and soil microbial composition (i.e., Fungi/Bacteria ratio, amounts of Gram-negative bacteria, Actinomycetes, and arbuscular mycorrhizal fungi), rather than the abundances of functional genes involved in mineralization processes, controlled soil C and N mineralization rates along the long-term vegetation successional gradient.ConclusionsAbandoning cropland for natural succession could facilitate the recuperation of soil C and N processes and alter soil microbial composition and functional genes. The abundances of microbial functional genes are less important than previously expected in regulating soil C and N mineralization rates.
登录
查看更多内容
亚热带混交林土壤深度间土壤碳氮矿化之间的解耦联系
影响因子：
9.7
作者：
Qiuxiang Tian;Xinggang Wang;Dongya Wang;Min Wang;Chang Liao;Xiaolu Yang;Feng Liu
通讯作者：
Feng Liu
影响因子：
9.7
作者：
V. Tardy;A. Spor;O. Mathieu;J. Lévêque;S. Terrat;Pierre Plassart;T. Régnier;R. Bardgett;W. H. Putten
通讯作者：
V. Tardy;A. Spor;O. Mathieu;J. Lévêque;S. Terrat;Pierre Plassart;T. Régnier;R. Bardgett;W. H. Putten
将垃圾产生、质量和分解与农业废弃后的植被演替联系起来
影响因子：
9.7
作者：
Haishan Dang;Chen Ye;Yulong Zhang;Quanfa Zhang
通讯作者：
Quanfa Zhang
影响因子：
16.6
作者：
Morriën E;Hannula SE;Snoek LB;Helmsing NR;Zweers H;de Hollander M;Soto RL;Bouffaud ML;Buée M;Dimmers W;Duyts H;Geisen S;Girlanda M;Griffiths RI;Jørgensen HB;Jensen J;Plassart P;Redecker D;Schmelz RM;Schmidt O;Thomson BC;Tisserant E;Uroz S;Winding A;Bailey MJ;Bonkowski M;Faber JH;Martin F;Lemanceau P;de Boer W;van Veen JA;van der Putten WH
通讯作者：
van der Putten WH
影响因子：
9.7
作者：
B. Zhu;B. Zhu;J. Gutknecht;J. Gutknecht;D. Herman;D. Keck;D. Keck;M. Firestone;W. Cheng
通讯作者：
B. Zhu;B. Zhu;J. Gutknecht;J. Gutknecht;D. Herman;D. Keck;D. Keck;M. Firestone;W. Cheng