Effects of plastic film mulching on soil respiration and its sensitivity to temperature and water content

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2024-08-06 DOI:10.1016/j.eti.2024.103780

Na Li , Wen Qi , Chunxia Jiang , Huatao Liu , Enke Liu

{"title":"Effects of plastic film mulching on soil respiration and its sensitivity to temperature and water content","authors":"Na Li , Wen Qi , Chunxia Jiang , Huatao Liu , Enke Liu","doi":"10.1016/j.eti.2024.103780","DOIUrl":null,"url":null,"abstract":"<div>Soil respiration (Rs) and its temperature and water sensitivities play a vital role in understanding the processes and mechanisms of carbon (C) cycling in half plastic film mulching (Mm) field. A two-year field experiment was conducted to investigate the responses of Rs and its components, including respiration from roots (Rr) and soil free-living microbes (Rm), to soil temperature (ST) and water content (SWC) amidst environmental changes. Results showed that Mm significantly stimulated the cumulative CO2 emissions of Rm (CE-Rm) and Rr mainly due to the prominent increase of them in rows without plastic film in Mm. This was attributed to more favorable microclimatic conditions under Mm for microbes and roots growth, identified by improved SWC, dissolved organic C (DOC) and total nitrogen (DTN), microbial biomass C (MBC) and nitrogen (MBN) contents, enzyme activities and functional genes abundances associated with C degradation. The combination of ST and SWC can help to more accurately predict the seasonal Rr and Rm variation than solely ST or SWC. Mm considerably increased the temperature sensitivity of Rm and the water sensitivities of Rm and Rr probably due to the improved soil C and nitrogen substrates for microbes and roots indicated by growing DOC and DTN contents. This study indicated that the Mm could sustain crop yield without increasing environmental impacts because there was no significant difference for CE-Rm per unit of grain yield produced between M0 and Mm.</div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103780"},"PeriodicalIF":6.7000,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2352186424002566/pdfft?md5=6aebfbeed658c0dd4f58e83ae1eca262&pid=1-s2.0-S2352186424002566-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Technology & Innovation","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2352186424002566","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Soil respiration (R_s) and its temperature and water sensitivities play a vital role in understanding the processes and mechanisms of carbon (C) cycling in half plastic film mulching (M_m) field. A two-year field experiment was conducted to investigate the responses of R_s and its components, including respiration from roots (R_r) and soil free-living microbes (R_m), to soil temperature (ST) and water content (SWC) amidst environmental changes. Results showed that M_m significantly stimulated the cumulative CO₂ emissions of R_m (CE-R_m) and R_r mainly due to the prominent increase of them in rows without plastic film in M_m. This was attributed to more favorable microclimatic conditions under M_m for microbes and roots growth, identified by improved SWC, dissolved organic C (DOC) and total nitrogen (DTN), microbial biomass C (MBC) and nitrogen (MBN) contents, enzyme activities and functional genes abundances associated with C degradation. The combination of ST and SWC can help to more accurately predict the seasonal R_r and R_m variation than solely ST or SWC. M_m considerably increased the temperature sensitivity of R_m and the water sensitivities of R_m and R_r probably due to the improved soil C and nitrogen substrates for microbes and roots indicated by growing DOC and DTN contents. This study indicated that the M_m could sustain crop yield without increasing environmental impacts because there was no significant difference for CE-R_m per unit of grain yield produced between M₀ and M_m.

查看原文本刊更多论文

塑料薄膜覆盖对土壤呼吸作用的影响及其对温度和含水量的敏感性

土壤呼吸作用（Rs）及其对温度和水分的敏感性对于了解半塑料薄膜覆盖（Mm）田地的碳（C）循环过程和机制起着至关重要的作用。通过为期两年的田间试验，研究了在环境变化中 Rs 及其组分（包括根系呼吸作用（Rr）和土壤自由生活微生物（Rm））对土壤温度（ST）和含水量（SWC）的响应。结果表明， Mm 显著提高了 Rm（CE-Rm）和 Rr 的二氧化碳累积排放量，这主要是由于在 Mm 中未铺塑料薄膜的行中，Rm 和 Rr 的排放量明显增加。这归因于 Mm 条件下更有利于微生物和根系生长的微气候条件，具体表现为 SWC、溶解有机碳（DOC）和总氮（DTN）、微生物生物量碳（MBC）和氮（MBN）含量、酶活性以及与碳降解相关的功能基因丰度均有所提高。与单纯的 ST 或 SWC 相比，ST 和 SWC 的结合有助于更准确地预测 Rr 和 Rm 的季节变化。Mm 显著提高了 Rm 的温度敏感性以及 Rm 和 Rr 的水分敏感性，这可能是由于 DOC 和 DTN 含量的增加改善了微生物和根系的土壤碳和氮基质。这项研究表明，Mm 可以在不增加环境影响的情况下维持作物产量，因为 M0 和 Mm 在单位谷物产量的 CE-Rm 方面没有显著差异。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Environmental Technology & Innovation Environmental Science-General Environmental Science

CiteScore

14.00

自引率

4.20%

发文量

435

审稿时长

74 days

期刊介绍： Environmental Technology & Innovation adopts a challenge-oriented approach to solutions by integrating natural sciences to promote a sustainable future. The journal aims to foster the creation and development of innovative products, technologies, and ideas that enhance the environment, with impacts across soil, air, water, and food in rural and urban areas. As a platform for disseminating scientific evidence for environmental protection and sustainable development, the journal emphasizes fundamental science, methodologies, tools, techniques, and policy considerations. It emphasizes the importance of science and technology in environmental benefits, including smarter, cleaner technologies for environmental protection, more efficient resource processing methods, and the evidence supporting their effectiveness.