/ Z. K. Zhu [et al.] // Plant Soil. - 2017. -
Vol. 416,
Is. 1-2. - P243-257,
DOI 10.1007/s11104-017-3210-4. - Cited References:62. - The present study was supported by the National Natural Science Foundation of China (41522107; 41501321), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB15020401), and the Recruitment Program of High-End Foreign Experts of the State Administration of Foreign Experts Affairs, awarded to Prof. Georg Guggenberger (GDT20164300013). We thank the Public Service Technology Center, Institute of Subtropical Agriculture, Chinese Academy of Sciences for technical assistance.
. - ISSN 0032-079X. - ISSN 1573-5036
РУБ Agronomy + Plant Sciences + Soil Science
Аннотация: The 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. We conducted an incubation study with four different C-13-labeled substrates: rice shoots (Shoot-C), rice roots (Root-C), rice rhizodeposits (Rhizo-C), and microbe-assimilated C (Micro-C). Shoot- 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 C-13-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 C-13-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. The 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.
WOS,
Смотреть статью Держатели документа: Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China.
Chinese Acad Sci, Inst Subtrop Agr, Changsha Res Stn Agr & Environm Monitoring, Changsha 410125, Hunan, Peoples R China.
Leibniz Univ Hannover, Inst Soil Sci, D-30419 Hannover, Germany.
SB RAS, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia.
Доп.точки доступа: Zhu, Zhenke; Ge, Tida; Hu, Yajun; Zhou, Ping; Wang, Tingting; Shibistova, Olga; Guggenberger, Georg; Su, Yirong; Wu, Jinshui; National Natural Science Foundation of China [41522107, 41501321]; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB15020401]; Recruitment Program of High-End Foreign Experts of the State Administration of Foreign Experts Affairs [GDT20164300013]
