Effects of Organic Amendments on Soil Aggregate Stabilityand Microbial Biomass in a Long-Term FertilizationExperiment (IOSDV)

Csitári, Gábor and Tóth, Zoltán and Kökény, Mónika (2021) Effects of Organic Amendments on Soil Aggregate Stabilityand Microbial Biomass in a Long-Term FertilizationExperiment (IOSDV). Sustainability, 13. ISSN 2071-1050

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Abstract

The effect of two types of organic amendment (manure and straw incorporation) andvarious doses (0–200 kg N*ha−1) of mineral N fertilization on microbial biomass C (MBC), aggregatestability (AS), soil organic C (SOC) and grain yield were investigated in an IOSDV long-term fertiliza-tion experiment (Keszthely, Hungary). This study was conducted during years 2015–2016 in a sandyloam Ramann-type brown forest soil (Eutric Cambisol according to WRB). Organic amendments hada significant effect on AS, MBC and SOC, increased their values compared to the unamended control.The organic amendments showed different effects on AS and MBC. AS was increased the most bystraw incorporation and MBC by manure application. The magnitude of temporal variability of ASand MBC differed. Presumably, the different effects of organic amendments and the different degreesof temporal variability explain why there was only a weak (0.173) correlation between AS and MBC.AS did not correlate with SOC or grain yield. MBC correlated (0.339) with SOC but not with the grainyield. The N fertilizer dose did not have a significant effect on AS and MBC, but had a significanteffect on SOC and grain yield

Item Type: Article
Uncontrolled Keywords: soil aggregate stability; microbial biomass; long-term fertilization experiment; IOSDV;organic amendment; N fertilization
Subjects: S Agriculture > SB Plant culture
Depositing User: Gombosné, Sára
Date Deposited: 21 Oct 2021 14:17
Last Modified: 21 Oct 2021 14:17
URI: http://kea.ke.hu/id/eprint/66

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