Fate of rice shoot and root residues, rhizodeposits, and microbial assimilated carbon in paddy soil - part 2: turnover and microbial utilization
Fate of rice shoot and root residues, rhizodeposits, and microbial assimilated carbon in paddy soil - part 2: turnover and microbial utilization
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水稻土中稻芽和根残留物、根际沉积物和微生物同化碳的归宿 - 第 2 部分：周转和微生物利用
DOI：
10.1007/s11104-017-3210-4
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发表时间：
2017-02
期刊：
影响因子：
4.9
通讯作者：
Ge TD
中科院分区：
文献类型：
--
作者：
Zhu Zhenke;Ge Tida;Hu Yajun;Zhou Ping;Wang Tingting;Guggenberger Georg;Su Yirong;Wu Jinshui;Zhu Zhenke;Ge Tida;Hu Yajun;Zhou Ping;Wu Jinshui;Shibistova Olga;Guggenberger Georg;Shibistova Olga;Ge TD
研究背景与目的植物源和微生物源碳（C）的周转在土壤有机碳（SOC）循环中起着重要作用。然而，有有限的信息营业额最近光合作用的植物和土壤微生物来源的C在paddysoil.MethodsWe进行了孵育研究与四个不同的13 C标记的基板：水稻芽（Shoot-C），水稻根（Root-C），水稻根沉积物（Rizopodesium）（Rizopodesium），结果地上部和根系C首先迅速转化为溶解性有机碳（DOC）库，而微生物生物量C（MBC）和SOC的回收率随培养时间的延长而增加。培养结束时，DOC、MBC和SOC库中地上部C的回收率分别为0.05%、9.8%和10.0%，根系C的回收率分别为0.06%、15.9%和16.5%。在DOC，MBC和SOC池中恢复的Rhizo-和Micro-C的百分比随着时间的推移缓慢下降。实验结束时，DOC库中的Rhizo-C和Micro-C的回收率不到0.1%，而SOC库中的Rhizo-C和Micro-C的回收率分别为45.2%和33.8%。芽-和根-C大大增加了13 C-PLFA的量在最初的50 d培养，这涉及PLFA是指示真菌和放线菌，而那些分配革兰氏阳性细菌减少。利用根际碳和微碳的土壤微生物动态与利用地上部碳和根际碳的土壤微生物动态相反。13 C-PLFA的主成分分析表明，微生物群落组成明显转移，在芽-C和根-C处理随着时间的推移，但组成变化不大，在RMB-C和Micro-C treatment. Conclusions输入C基板驱动土壤微生物群落结构和功能的碳稳定。水稻土沉积碳和微生物同化碳的输入率较低，但其稳定性优于地上部和根系来源的碳，因此优先参与水稻土稳定性SOC的形成。
Background and aimsThe turnover of plant- and microbial- derived carbon (C) plays a significant role in the soil organic C (SOC) cycle. However, there is limited information about the turnover of the recently photosynthesized plant- and soil microbe-derived C in paddy soil.MethodsWe conducted an incubation study with four different 13C–labeled substrates: rice shoots (Shoot-C), rice roots (Root-C), rice rhizodeposits (Rhizo-C), and microbe-assimilated C (Micro-C).ResultsShoot- and Root-C were initially rapidly transformed into the dissolved organic C (DOC) pool, while their recovery in microbial biomass C (MBC) and SOC increased with incubation time. There were 0.05%, 9.8% and 10.0% of shoot-C, and 0.06%, 15.9% and 16.5% of root-C recovered in DOC, MBC and SOC pools, respectively at the end of incubation. The percentages of Rhizo- and Micro-C recovered in DOC, MBC, and SOC pools slowly decreased over time. Less than 0.1% of the Rhizo- and Micro-C recovered in DOC pools at the end of experiment; while 45.2% and 33.8% of Rhizo- and Micro-C recovered in SOC pools. Shoot- and Root-C greatly increased the amount of 13C–PLFA in the initial 50 d incubation, which concerned PLFA being indicative for fungi and actinomycetes while those assigning gram-positive bacteria decreased. The dynamic of soil microbes utilizing Rhizo- and Micro-C showed an inverse pattern than those using Shoot- and Root-C. Principal component analysis of 13C–PLFA showed that microbial community composition shifted obviously in the Shoot-C and Root-C treatments over time, but that composition changed little in the Rhizo-C and Micro-C treatments.ConclusionsThe input C substrates drive soil microbial community structure and function with respect to carbon stabilization. Rhizodeposited and microbial assimilated C have lower input rates, however, they are better stabilized than shoot- and root-derived C, and thus are preferentially involved in the formation of stable SOC in paddy soils.
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水稻土中稻芽和根残留物、根际沉积物和微生物同化碳的归宿 - 第 1 部分：分解和启动效应
影响因子：
4.9
作者：
Zhu Zhenke;Zeng Guanjun;Ge Tida;Hu Yajun;Tong Chengli;Shibistova Olga;He Xinhua;Wang Juan;Guggenberger Georg;Wu Jinshui
通讯作者：
Wu Jinshui
影响因子：
6.5
作者：
Lu, YH;Watanabe, A;Kimura, M
通讯作者：
Kimura, M
影响因子：
9.7
作者：
Rubino, M.;Dungait, J. A. J.;Cotrufo, M. F.
通讯作者：
Cotrufo, M. F.
影响因子：
2.5
作者：
Y. Kuzyakov;A. Larionova
通讯作者：
Y. Kuzyakov;A. Larionova
影响因子：
9.7
作者：
Jones, DL;Kemmitt, SJ;Edwards, AC
通讯作者：
Edwards, AC