Effect of biodynamic soil amendments on microbial communities in comparison with inorganic fertilization

被引：40

作者：

Faust, Sibylle ^{[1
]}

Heinze, Stefanie ^{[2
]}

Ngosong, Christopher ^{[3
]}

Sradnick, Andre ^{[4
]}

Oltmanns, Meike ^{[5
]}

Raupp, Joachim ^{[6
]}

Geisseler, Daniel ^{[7
]}

Joergensen, Rainer Georg ^{[1
]}

机构：

[1] Univ Kassel, Soil Biol & Plant Nutr, Nordbahnhofstr 1a, D-37213 Witzenhausen, Germany

[2] Ruhr Univ Bochum, Dept Geog Soil Sci & Soil Ecol, Univ Str 150, D-44801 Bochum, Germany

[3] Univ Buea, Fac Agr & Vet Med, Dept Agron & Appl Mol Sci, POB 63, South West Reg, Cameroon

[4] Leibniz Inst Vegetable & Ornamental Crops, Theodor Echtermeyer Weg 1, D-14979 Grossbeeren, Germany

[5] Forschungsring eV, Brandschneise 5, D-64295 Darmstadt, Germany

[6] Agricscience Org, Geinsheimer Str 3, D-64521 Gross Gerau, Germany

[7] Univ Calif Davis, Dept Land Air & Water Resources, One Shields Ave, Davis, CA 95616 USA

来源：

APPLIED SOIL ECOLOGY | 2017年 / 114卷

关键词：

Amino sugars; Ergosterol; PLFA; NLFA; Arbuscular mycorrhizal fungi; ARBUSCULAR MYCORRHIZAL FUNGI; CONVENTIONAL FARMING SYSTEMS; FATTY-ACID PROFILES; BACTERIAL RESIDUES; ORGANIC-MATTER; FARMYARD MANURE; BIOMASS; GROWTH; QUALITY; CARBON;

D O I：

10.1016/j.apsoil.2017.03.006

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Cattle farmyard manure application is an important tool for maintaining soil fertility in organic agriculture, especially in biodynamic systems. The first objective was to investigate whether application of biodynamic preparations (CMBD treatment) causes positive effects additional to those of composted cattle farmyard manure fertilization (CM treatment). The second objective was to investigate the response of microbial cell-wall and cell-membrane biomarkers to the CM and CMBD treatments in comparison with inorganic fertilization plus straw return (MIN treatment). The third objective was to reassess conversion values from the phospho-lipid fatty acid (PLFA) 16:1 omega 5 to arbuscular mycorrhizal fungal (AMF) biomass as well as those from ergosterol and the PLFA 18:2 omega 6,9 to saprotrophic fungal biomass. Application of biodynamic preparations did not cause any positive effects additional to those of composted farmyard manure fertilization. In the CM and CMBD treatments, bacterial PLFA content was 33% higher than in the MIN treatment, whereas bacterial muramic acid (MurN) content was 55% higher. The AMF indicator PLFA 16:1 omega 5 as well as neutral lipid fatty acid (NLFA) 16:1 omega 5 were both increased by roughly 80%, as the NLFA/PLFA ratio of 16:1 omega 5 varied only in a small range around 3.8. This indicates negligible interference from bacteria, suggesting that PLFA 16:omega 5 is a suitable marker for AMF biomass in soil. The indicators for saprotrophic fungi, the ergosterol content and the contribution of 18:2 omega 6,9 to total PLFA (mol%) were 40 and 60% higher, respectively, in the CM and CMBD than in the MIN treatments. In contrast, fungal GlcN was not affected by the fertilizer treatments. An increased ergosterol/fungal GlcN ratio indicates a shift in fungal community from AMF towards saprotrophic fungi in arable soils. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：82 / 89

页数：8