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作者:

Yu, Lu (Yu, Lu.) | Homyak, Peter M. (Homyak, Peter M..) | Kang, Xiaoxi (Kang, Xiaoxi.) | Brookes, Philip C. (Brookes, Philip C..) | Ye, Yikai (Ye, Yikai.) | Lin, Yeneng (Lin, Yeneng.) | Muhammad, Afzal (Muhammad, Afzal.) | Xu, Jianming (Xu, Jianming.)

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Scopus SCIE

摘要:

To understand the effects of biochar and urea on soil N availability and plant growth, we conducted a pot experiment growing barley (Hordeum vulgare L.) under six treatments: control (N0), soil with 30 g kg(-1) biochar (N0B), soil with 0.23 g kg(-1) urea (N1), soil with 0.23 g kg(-1) urea and 30 g kg(-1) biochar (N1B), soil with 0.46 g kg(-1) urea (N2), and soil with 0.46 g kg(-1) urea and 30 g kg(-1) biochar (N2B). The nitrifying community abundance and compositions in rhizosphere and bulk soils were analyzed using quantitative polymerase chain reaction (qPCR) and amplicon-based Illumina Hiseq sequencing. Adding urea with biochar (N1B) produced the greatest increase in above- and belowground plant biomass, followed by doubling the amount of urea with biochar (N2B); both treatments raised pH (p < 0.001) and lowered extractable N in the rhizosphere (p < 0.05). N1B treatment produced the greatest increase in ammonia-oxidizing bacteria (AOB) amoA gene copies, presumably because the combined amendment raised soil pH, which favored AOB access to NH4+. Nitrifier sequences were selected after blasting with reported nitrifiers in NCBI (similarity >= 97%). Nitrosospira dominated AOB communities during the plant seedling stage; however, during the mature stage, Nitrosomonas dominated over Nitrosospira and the nitrite-oxidizing bacteria (NOB) community became diverse. Redundancy analysis indicated that nitrifying community composition was affected by multiple soil properties, including N availability (i.e., exchangeable NH4+ and NO3-) and soil chemistry (i.e., pH, dissolved organic C, and exchangeable base cations). Our research suggests a positive application of combining biochar with urea in improving N bioavailability and promoting plant growth in the acidic soil.

关键词:

Nitrite-oxidizing bacteria (NOB) Soil acidity Plant growth Nitrosospira Nitrosomonas Ammonia-oxidizing bacteria (AOB)

作者机构:

  • [ 1 ] [Yu, Lu]Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 2 ] [Kang, Xiaoxi]Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 3 ] [Brookes, Philip C.]Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 4 ] [Ye, Yikai]Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 5 ] [Lin, Yeneng]Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 6 ] [Muhammad, Afzal]Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 7 ] [Xu, Jianming]Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 8 ] [Yu, Lu]Beijing Univ Technol, Inst Circular Econ, Beijing 100124, Peoples R China
  • [ 9 ] [Homyak, Peter M.]Univ Calif Riverside, Dept Environm Sci, 900 Univ Ave, Riverside, CA 92521 USA
  • [ 10 ] [Kang, Xiaoxi]Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 11 ] [Brookes, Philip C.]Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 12 ] [Ye, Yikai]Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 13 ] [Lin, Yeneng]Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 14 ] [Muhammad, Afzal]Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China
  • [ 15 ] [Xu, Jianming]Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China

通讯作者信息:

  • [Xu, Jianming]Zhejiang Univ, Inst Soil & Water Resources & Environm Sci, Coll Environm & Resource Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China;;[Xu, Jianming]Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China

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来源 :

BIOLOGY AND FERTILITY OF SOILS

ISSN: 0178-2762

年份: 2020

期: 2

卷: 56

页码: 169-183

6 . 5 0 0

JCR@2022

ESI学科: AGRICULTURAL SCIENCES;

ESI高被引阀值:98

被引次数:

WoS核心集被引频次: 25

SCOPUS被引频次: 24

ESI高被引论文在榜: 0 展开所有

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