Influences of poly(butylene adipate-co-terephthalate) on soil microbiota and plant growth

Muroi, Fumihiro; Tachibana, Yuya; Kobayashi, Yukiko; Sakurai, Takanori; Kasuya, Ken-ichi

doi:10.1016/j.polymdegradstab.2016.05.018

Cited by 113 publications

(77 citation statements)

References 45 publications

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“…This is in contrast to other studies that have reported altered bacterial communities in soils under BDMs (Koitabashi et al, 2012;Li et al, 2014b;Muroi et al, 2016), and under non-biodegradable plastic mulches (Farmer et al, 2017;Munoz et al, 2015). Such opposite findings could be due to differences in methodology: For example, the studies by Koitabashi et al (2012) and Muroi et al (2016) were shorter laboratory incubation studies in controlled conditions (28 • C to 30 • C), used pure polymer feedstock rather than commercial film formulations which include plasticizers and other additives, and relied on different detection methods such as polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE). Laboratory studies under controlled conditions often result in more rapid microbial responses to treatments compared to field studies where variable environments introduce more noise.…”

Section: Discussioncontrasting

confidence: 99%

Effects of biodegradable plastic film mulching on soil microbial communities in two agroecosystems

Bandopadhyay

Sintim

DeBruyn

2020

PeerJ

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Plastic mulch films are used globally in crop production but incur considerable disposal and environmental pollution issues. Biodegradable plastic mulch films (BDMs), an alternative to polyethylene (PE)-based films, are designed to be tilled into the soil where they are expected to be mineralized to carbon dioxide, water and microbial biomass. However, insufficient research regarding the impacts of repeated soil incorporation of BDMs on soil microbial communities has partly contributed to limited adoption of BDMs. In this study, we evaluated the effects of BDM incorporation on soil microbial community structure and function over two years in two geographical locations: Knoxville, TN, and in Mount Vernon, WA, USA. Treatments included four plastic BDMs (three commercially available and one experimental film), a biodegradable cellulose paper mulch, a non-biodegradable PE mulch and a no mulch plot. Bacterial community structure determined using 16S rRNA gene amplicon sequencing revealed significant differences by location and season. Differences in bacterial communities by mulch treatment were not significant for any season in either location, except for Fall 2015 in WA where differences were observed between BDMs and no-mulch plots. Extracellular enzyme assays were used to characterize communities functionally, revealing significant differences by location and sampling season in both TN and WA but minimal differences between BDMs and PE treatments. Overall, BDMs had comparable influences on soil microbial communities to PE mulch films.

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Section: Discussioncontrasting

confidence: 99%

Effects of biodegradable plastic film mulching on soil microbial communities in two agroecosystems

Bandopadhyay

Sintim

DeBruyn

2020

PeerJ

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“…Characterizing the soil microbial communities under the different biodegradable mulches and non-biodegradable PE mulch revealed no significant effect of mulch type on bacterial community structure. This is in contrast to other studies that have reported altered bacterial communities in soils under BDMs (29, 40, 41), and under non-biodegradable plastic mulches (42, 43). Such opposite findings could be due to differences in methodology: for example, the studies by Koitabashi et al (40) and Muroi et al (41) were shorter laboratory incubation studies in controlled conditions (28 to 30°C), used pure polymer feedstock (rather than commercial film formulations which include plasticizers and other additives) and relied on detection methods such as polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE).…”

Section: Discussioncontrasting

confidence: 99%

“…It should be noted that enrichment was observed under BDM but not the PE plots in WA, suggesting that this is response to the incorporation of BDMs into the soil (as opposed to an indirect effect of microclimate modification, such as soil warming). Previous studies have also demonstrated increased fungal abundances in soil because of BDM incorporation (29, 41, 49, 50). Fungi have been observed to be important colonizers and degraders of BDMs (30, 40, 41).…”

Section: Discussionmentioning

confidence: 85%

“…Previous studies have also demonstrated increased fungal abundances in soil because of BDM incorporation (29, 41, 49, 50). Fungi have been observed to be important colonizers and degraders of BDMs (30, 40, 41). Tilled into soil, BDMs are a very small input of carbon when taking into account the volume of soil into which they are incorporated (5).…”

Section: Discussionmentioning

confidence: 85%

“…Laboratory studies under controlled conditions often result in more rapid microbial responses to treatments as opposed to field studies where variable environments introduces more noise. Our lack of observed difference may also be because of a realistic, but low, plastic to soil ratio: for example, Muroi et al (41) used soil burial studies with an artificially high 1.8 g PBAT films in 300 g soil with added 30 ml of basal medium. Finally, our aim was to characterize responses in bulk soil communities to understand the overall system level response to plastic films, so we likely missed changes happening on smaller spatial scales.…”

Section: Discussionmentioning

confidence: 97%

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Structural and Functional Responses of Soil Microbial Communities to Biodegradable Plastic Film Mulching in Two Agroecosystems

Bandopadhyay

Sintim

DeBruyn

2019

Preprint

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18Polyethylene (PE) plastic mulch films are used globally in crop production but incur considerable 19 disposal and environmental pollution issues. Biodegradable plastic mulch films (BDMs), an 20 alternative to PE-based films, are designed to be tilled into the soil where they are expected to be 21 mineralized to carbon dioxide, water and microbial biomass. However inadequate research 22 regarding the impacts of repeated incorporation of BDMs on soil microbial communities has partly 23 contributed to limited adoption of BDMs. In this study, we evaluated the effects of BDM 24 incorporation on soil microbial community structure and function over two years in two 25 geographical locations: Knoxville, TN, and in Mount Vernon, WA. Treatments included four 26 plastic BDMs, a completely biodegradable cellulose mulch, a non-biodegradable PE mulch and a 27 no mulch plot. Bacterial community structure determined using 16S rRNA amplicon sequencing 28 revealed significant differences by location and season. Differences in bacterial communities by 29 mulch treatment were not significant for any season in either location, except for Fall 2015 in WA 30 where differences were observed between BDMs and no-mulch plots. Extracellular enzyme rate 31 assays were used to characterize communities functionally, revealing significant differences by 32 location and sampling season in both TN and WA but minimal differences between BDMs and PE 33 treatments. Limited effects of BDM incorporation on soil bacterial community structure and soil 34 enzyme activities when compared to PE suggest that BDMs have comparable influences on soil 35 microbial communities, and therefore could be considered an alternative to PE. 36 Importance 37 Plastic film mulches increase crop yields and improve fruit quality. Most plastic mulches are made 38 of polyethylene (PE), which is poorly degradable, resulting in undesirable end-of-life outcomes. 39 Biodegradable mulches (BDMs) may be a sustainable alternative to PE. BDMs are made of 40 3 polymers which can be degraded by soil microbial enzymes, and are meant to be tilled into soil 41 after use. However, uncertainty about impacts of tilled-in BDMs on soil health has restricted 42 adoption of BDMs. Our previous research showed BDMs did not have a major effect on a wide 43 range of soil quality indicators (Sintim et al. 2019); here we focus on soil microbial communities, 44 showing that BDMs do not have detectable effects on soil microbial communities and their 45 functions, at least over the short term. This informs growers and regulators about use of BDMs in 46 crop production, paving a way for an agricultural practice that reduces environmental plastic 47 pollution.48

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Biodegradability of Biopolymers

Nayak,

Dutta

2024

Agro‐Waste Derived Biopolymers and Biocomposites

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Influences of poly(butylene adipate-co-terephthalate) on soil microbiota and plant growth

Cited by 113 publications

References 45 publications

Effects of biodegradable plastic film mulching on soil microbial communities in two agroecosystems

Effects of biodegradable plastic film mulching on soil microbial communities in two agroecosystems

Structural and Functional Responses of Soil Microbial Communities to Biodegradable Plastic Film Mulching in Two Agroecosystems

Biodegradability of Biopolymers

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