Plateau pika (Ochotona curzoniae) bioturbation triggers soil organic carbon loss by altering plant inputs and soil properties and their control on microbial composition

CATENA, Год журнала: 2025, Номер 250, С. 108737 - 108737

Опубликована: Янв. 25, 2025

Язык: Английский

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The Addition of Straw Affects the Response of Labile Soil Organic Carbon to the Freezing and Thawing Process

Agronomy, Год журнала: 2025, Номер 15(2), С. 479 - 479

Опубликована: Фев. 17, 2025

Global warming alters freeze–thaw process frequency and intensity, impacting soil carbon cycles. Four soils from a 12-year straw return experiment were used: S0 (no straw), S1 (low rate of addition), S2 (medium rate), S3 (high rate). Ten treatments with or without temporary addition at different rates conducted to explore their effects on microbial biomass (MBC) dissolved organic (DOC) under laboratory field conditions. Compared constant temperature, the conditions reduced MBC (5.79%~29.9%), whereas this trend was mitigated reversed The alleviating effect decrease in greater than S1, S2, by an average 31.7%. Medium application (S2 8 t/ha) provided appropriate labile C levels, enhancing activity while keeping DOC low reducing loss risk. results revealed discrepancies OC between conditions, mitigation impacts addition, Liaohe Plain. Therefore, proper nutrient management can maintain regulate areas

Язык: Английский

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Effects of Different Straw Returning Periods and Nitrogen Fertilizer Combinations on Rice Roots and Yield in Saline–Sodic Soil

Agronomy, Год журнала: 2024, Номер 14(11), С. 2463 - 2463

Опубликована: Окт. 22, 2024

Straw return is an effective management practice for improving physical and chemical properties of saline–sodic soil in Northeast China. decomposition nutrient release are deeply influenced by climatic factors. In China, straw decomposes slowly due to the long winter with low temperatures. Therefore, season may be a key issue affecting rice. However, impact returning different seasons on rice disregarded not commonly researched. We conducted 2-year field experiment, including two residue treatments: spring treatment (SR) autumn (AR), each containing five N rates (0, 90, 180, 270, 360 kg ha−1) as sub-treatments. The results reveal that, compared treatment, significantly improved root morphology vigor increased number spikes per unit area, which directly yield 4.76% (2020) 6.62% (2021). addition, showed increasing then decreasing trend increase fertilizer application, it was at its maximum when application rate 270 ha−1. Compared able reduce 31.46% 38.48% (2021) without yield. Our findings demonstrate that combined nitrogen fertilization promising systems soils, under conditions best

Язык: Английский

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Effects of Long-Term Soil Tillage Practices on Soil Organic C Accumulation Characteristics in Double-Cropped Rice Paddy

Land, Год журнала: 2024, Номер 13(12), С. 2074 - 2074

Опубликована: Дек. 2, 2024

Unreasonable soil tillage measures have caused a sharp decline in the carbon (C) pool capacity of rice (Oryza sativa L.) paddy fields, reduced fertility, and threatened safe production rice. Based on long-term position–location experiments started 2005, this paper systematically studied effects different treatments (CT: no return plowing straw to field as control; CTS: field; NTS: no-tillage RTS: rotary field) physical chemical properties organic (SOC) accumulation characteristics order clarify impact cycle microecology double-cropped fields provide theoretical basis for SOC sequestration sustainable utilization southern China. The results were follows: A total 30.7–40.7% stored was residue C derived from microorganisms, 45.7–54.2% came plant residue-derived C. Straw (CTS, RTS, NTS) significantly increased lignin phenol content promoted plant-derived SOC. Soil RTS treatment higher than that CTS (p < 0.05). Amino sugar rhizosphere non-rhizosphere soil. measure returning amino non-rhizosphere. plants greater microbial residues Hence, no-till/rotary can improve SOC, which is great significance achieving “C neutrality” alleviating pressure food security.

Язык: Английский

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Biochars Induced Changes in CO2 Evolution and Biochemical Properties of an Alkaline Subtropical soil

Journal of soil science and plant nutrition, Год журнала: 2024, Номер unknown

Опубликована: Дек. 18, 2024

Язык: Английский

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