DOI: 10.5061/dryad.1zcrjdg1x
title: Data from: Biodegradable microplastics can cause more serious loss of soil organic carbon by priming effect than conventional microplastics in farmland shelterbelts

description: Globally, the widespread utilization of plastic products has resulted in
 the accumulation of microplastics (MPs) in the soil. MPs have the
 potential to impact the loss of soil organic carbon (SOC). Nevertheless,
 the influence of different types of MPs on SOC loss remains
 uncertain. In this study, a 38 d’ incubation experiment with two
 kinds of conventional MPs (polyethylene (PE), polypropylene (PP)) as well
 as two kinds of biodegradable MPs (polyhydroxyalkanoate (PHA), polylactic
 acid (PLA)) were added into three types of soil (loam, sandy loam, and
 sandy soil) in farmland shelterbelts, and the sources of CO2 emissions was
 distinguished by the difference in 13C isotope abundance between the
 biodegradable MPs (PHA and PLA) (-10.02 ~ -9.92 ‰) and the soil (-24.39 ~
 -22.86 ‰) (&gt;10‰). In conjunction with the structural
 characterization of MPs, as well as soil physicochemical properties and
 microbial characteristics, we observed that the conventional MPs did not
 degrade in short term incubation, but significantly enhance soil-derived
 CO2 emissions by altering the dissolved N content (NH4+-N and DTN) and
 reducing microbial biomass carbon (MBC) content only in sandy loam soil
 (P&lt;0.05). Biodegradable MPs degraded significantly, and enhanced
 soil-derived CO2 emissions by reducing soil dissolved total N (DTN) and
 NO3--N contents in loam, sandy loam and sandy soil
 (P&lt;0.05). Overall, the input of biodegradable MPs causes a
 more serious loss of SOC than conventional MPs as the soil sand content
 increased in short term incubation, which needs to be considered in
 predicting the global impact of increasing biodegradable MPs pollution.
description: # Biodegradable microplastics can cause more serious loss of soil organic
 carbon by priming effect than conventional microplastics in farmland
 shelterbelts ## Description of the data and file structure ### dataset Raw
 data.csv Soil data for the variables tested in the paper. Variables are as
 follows: * Group = The number of the microplastics addition and control
 group * First emission of soil CO2 (mg g-1 SOC) = CO2 release rate of soil
 organic carbon at first sampling * δ13 C of CO2 in first samping(‰) = The
 δ13 C of CO2 at first sampling * DOC(mg kg-1) = Dissolved organic carbon
 content of soil samples after incubation * MBC(mg kg-1) = Microbial
 biomass carbon content of soil samples after incubation * DTN(mg kg-1) =
 Dissolved total nitrogen content of soil samples after incubation * MBN(mg
 kg-1) = Microbial biomass nitrogen content in soil samples after
 incubation * NH4+-N(mg kg-1) = Content of ammonium nitrogen in soil
 samples after incubation * NO3--N(mg kg-1) = Nitrate nitrogen content in
 soil samples after incubation * pH = pH value of soil sample after
 incubation * null = No data were obtained. In this study, conventional
 microplastics exhibited no degradation during the short-term incubation;
 therefore, 13C isotopes were not employed to differentiate soil CO2
 emissions in the treatment group involving conventional microplastics.
 One-way analysis of variance (ANOVA) examined the differences in
 soil-derived CO2 emission, SOC loss, hydroxyl index (HI), soil
 physiochemical properties and microbial characteristics of different soils
 and MPs groups (P &lt; 0.05). The above experimental data were conducted
 using SPSS 27.0. Structural equation model was analyzed using Amos 26.0
 software to explore the pathways of MPs addition on cumulative
 soil-derived CO2 emissions.