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

Environmental Technology & Innovation, Journal Year: 2024, Volume and Issue: 36, P. 103780 - 103780

Published: Aug. 7, 2024

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

Language: Английский

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Substitution of Chemical Fertilizer with Organic Fertilizer Can Affect Soil Labile Organic Carbon Fractions and Garlic Yield by Mediating Soil Aggregate-Associated Organic Carbon

Agronomy, Journal Year: 2023, Volume and Issue: 13(12), P. 3062 - 3062

Published: Dec. 14, 2023

This study aimed to explore the impact paths on soil organic carbon and crop yield of completely or partially substituting chemical N fertilizer with fertilizers. A four-year field experiment was conducted included four treatments: (i) N0, no fertilization application; (ii) NF, only synthetic (iii) 1/2OF, substituted for 100% fertilizer, total application amount being equivalent half that NF; (iv) 1/3OF + 2/3NF, 1/3 from NF. Soil (TOC), labile organic-carbon fractions (microbial biomass (MBC), dissolved (DOC), particulate (POC), easily oxidized (EOC)), pool management index (CPMI), aggregated distribution, water-stable aggregate-associated were determined. Structural equation modeling (SEM) used clarify TOC garlic changes under different treatments. Results showed compared N0 1/2OF 2/3NF significantly increased contents by 14.1–20.6%. MBC, DOC, EOC higher than whereas treatment had greater POC. The CPMI improved treatment, proportion aggregate mass particle sizes >2 mm while 0.5–2 mm. a trend first increasing then decreasing, largest 1–2 Moreover, Similarly, 37.2% 15.3%, respectively, Furthermore, SEM analysis indicated regimes could directly affect components affecting carbon. In particular, aggregates played an important role, indirectly CPMI. These results indicate has potential improve content yield; moreover, fully applying can reduce input still maintaining increase in short term. However, caution is needed regarding type quantity added cropping systems, textures.

Language: Английский

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Fungal necromass carbon contributes to organic carbon sequestration within soil macroaggregates under manure application combined with plastic film mulching

Journal of Soils and Sediments, Journal Year: 2024, Volume and Issue: 24(5), P. 1899 - 1909

Published: March 16, 2024

Language: Английский

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Protect wetlands from legacy plastics

Science, Journal Year: 2024, Volume and Issue: 384(6703), P. 1414 - 1415

Published: June 27, 2024

Language: Английский

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