Biodegradable microplastics can cause more serious loss of soil organic carbon by priming effect than conventional microplastics in farmland shelterbelts

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 ‰) (>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 incu..., , , # 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 nitroge...

全球范围内，塑料制品的广泛应用已导致土壤中微塑料（microplastics, MPs）的累积。微塑料可能会影响土壤有机碳（soil organic carbon, SOC）的流失，但不同类型微塑料对土壤有机碳流失的影响仍不明确。本研究设置了为期38天的培养实验，将两种常规微塑料——聚乙烯（polyethylene, PE）、聚丙烯（polypropylene, PP），以及两种可降解微塑料——聚羟基脂肪酸酯（polyhydroxyalkanoate, PHA）、聚乳酸（polylactic acid, PLA）添加至农田防护林的三类土壤（壤土、砂壤土、砂土）中，并通过可降解微塑料（PHA和PLA，δ¹³C为-10.02~-9.92 ‰）与土壤（δ¹³C为-24.39~-22.86 ‰）之间超过10‰的¹³C同位素丰度差异，区分了CO₂排放的来源。结合微塑料的结构表征、土壤理化性质与微生物特性，我们观察到常规微塑料在短期培养中未发生降解……# 农田防护林体系中，可降解微塑料可通过激发效应较常规微塑料引发更为严重的土壤有机碳流失

### 数据与文件结构说明
#### dataset Raw data.csv
本文件包含论文中测试变量的土壤相关数据。
变量说明如下：
* Group：微塑料添加组与对照组编号
* 首次采样土壤CO₂释放量（mg g⁻¹ SOC）：首次采样时土壤有机碳的CO₂释放速率
* 首次采样CO₂的δ¹³C值（‰）：首次采样时CO₂的碳同位素δ¹³C值
* 溶解有机碳（DOC, mg kg⁻¹）：培养结束后土壤样品的溶解有机碳含量
* 微生物生物量碳（MBC, mg kg⁻¹）：培养结束后土壤样品的微生物生物量碳含量
* 溶解总氮（DTN, mg kg⁻¹）：培养结束后土壤样品的溶解总氮含量
* 微生物生物量氮（MBN, mg kg⁻¹）：培养结束后土壤样品的微生物生物量氮含量
* 铵态氮（NH₄⁺-N, mg kg⁻¹）：培养结束后土壤样品的铵态氮含量
* 硝态氮（NO₃⁻-N, mg kg⁻¹）：土壤样品培养后的硝态氮……