Organic nitrogen mineralisation in two contrasting agro-ecosystems is unchanged by biochar addition

被引：69

作者：

Dempster, D. N. ^{[1
]}

Jones, D. L. ^{[2
]}

Murphy, D. V. ^{[1
]}

机构：

[1] Univ Western Australia, Soil Biol Grp, Sch Earth & Environm M087, UWA Inst Agr,Fac Nat & Agr Sci, Crawley, WA 6009, Australia

[2] Bangor Univ, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales

来源：

SOIL BIOLOGY & BIOCHEMISTRY | 2012年 / 48卷

关键词：

Black carbon; Charcoal; Decomposition; DON; Soil organic matter; BLACK CARBON; AMINO-ACIDS; SOIL; TURNOVER; CHARCOAL; OXIDATION; SORPTION; NITRATE; IMPACT;

D O I：

10.1016/j.soilbio.2012.01.013

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Biochar additions to soil have been reported to enhance soil fertility whilst simultaneously storing carbon (C). We tested whether either fresh or field-conditioned (aged) biochar amendment to two contrasting agricultural soils would alter the mineralisation of organic N compounds. The mineralisation of C-14-labelled amino acids and peptides were determined over 20 days within each soil. An exponential kinetic decay model was subsequently fitted to the mineralisation data. Overall, statistical analysis revealed significant but small differences between the two biochar treatments and the unamended control treatment. We conclude that biochar has very limited impact on the mineralisation rate of low molecular weight dissolved organic N compounds in these agro-ecosystems. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：47 / 50

页数：4

共 38 条

[1] Nitrogen supply and demand in Australian agriculture [J].