Biomass, chemical composition, and microbial decomposability of rice root and straw produced under co-elevated CO2 and temperature

Park, Hyun-Jin; Lim, Sang-Sun; Kwak, Jin‐Hyeob; Lee, Kwang-Seung; Yang, Hang; Kim, Han-Yong; Lee, Sang-Mo; Choi, Woo‐Jung

doi:10.1007/s00374-020-01471-y

Cited by 14 publications

(5 citation statements)

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“…벼 재배 실험 본 연구는 광주광역시 용봉동에 위치한 전남대학교 실험 포장 (35°10'26.6"N, 126°53'53.9"E)에 설치된 Temperature Gradient Chambers (TGCs)를 이용하여 수행하였다. TGCs의 온도 제어 방식은 선행 연구에 충 분히 설명되어 있다 (Kim et al, 2011;Nam et al, 2013;Park et al, 2020). 벼는 선행 연구 (Kim et al, 2011;Nam et al, 2013)와 동일한 방식으로 포트 (지름 30 cm, 깊이 38 cm, 토양 20 kg) 재배하였다.…”

Section: Methodsunclassified

“…논에 투입되는 대표적인 유기물인 볏짚에 의해 논의 메탄 배출량은 볏짚 무투입에 비해 최대 200% 이상 증가하며, 특히 볏짚 투입 초 기 담수 조건에서 메탄 발생량이 크게 높아지는 것으로 보고되고 있다(Wang et al, 2012;Zhao et al, 2015;Lee et al, 2020a). 또한, 중간낙수기 이후 볏짚 투입에 의해 토양직접방출 메탄이 다시 증가한 것은 중간낙수기 동안 볏짚의 난분해성 성분의 추가적인 분해에 의한 메탄 기질 공급에 의한 것으로 판단된다(Park et al, 2020). 따라서, 본 연구 결과에 의하면 토양직접방출 메탄은 유기물에 따른 메탄 발생 시기와 벼 생육단계에 따른 통기조직을 통한 메탄 이동 에 의해 영향을 받는 것으로 나타났다.…”

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Methane emission from soil surface during rice growth season under different temperature, fertilization, and rice straw input conditions

Shin,

Baek,

Park

et al. 2024

Korean J. Soil. Sci. Fert.

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Rice (Oryza sativa L.) fields are major sources of methane (CH 4 ) which is the second most important greenhouse gas after carbon dioxide. Methane is known to be released mainly through aerenchyma tissues of rice plants; however, CH 4 is also released from soil surface through ebullition and diffusion. However, little information is available for CH 4 emission directly from soil surface (MDFS). In this study, in order to enlarge our understanding of CH 4 emission from rice paddy fields, we investigated MDFS under different rice growth conditions such as temperature, fertilization, and rice straw input. Rice was cultivated using pots with different fertilization regime (chemical fertilizer vs. organic fertilizer + manure compost) with or without rice straw input under ambient or elevated (+3°C) temperature. Methane emissions from rice plants (including MDFS) and MDFS alone without rice plants were measured three times before mid-season drainage (MSD), in the course of MSD, and after MSD. The MDFS flux and its contribution to the total CH 4 emissions was not affected by temperature, fertilization, and rice straw inputs across the rice growing season. The mean total CH 4 flux and MDFS flux were 20.7 mg m -2 hr -1 and 0.22 mg m -2 hr -1 , respectively, and thus the portion of MDFS to total CH 4 emission was about 1%. However, MDFS flux in the early rice season increased by rice straw input and MDFS accounted for 5% of total CH 4 emission, probably due to increased CH 4 production by rice straw inputs at higher levels than the capacity of aerenchyma tissue to intake and transport the CH 4 produced in the early rice season with low tiller number. Our result indicate that MDFS may substantially contribute to the total CH 4 emission in the early season of rice cultivation with organic inputs.

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Section: Methodsunclassified

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Methane emission from soil surface during rice growth season under different temperature, fertilization, and rice straw input conditions

Shin,

Baek,

Park

et al. 2024

Korean J. Soil. Sci. Fert.

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“…Root-derived soil organic carbon (SOC) is often considered more stable than that from aboveground plant residues ( Gale and Cambardella, 2000 ; Rasse et al, 2005 ; Kätterer et al, 2011 ). In the past decade, numerous studies have focused on the influence of plant carbon input on the native microbial biomass carbon (MBC) and SOC sequestration ( Lu et al, 2003 ; Guenet et al, 2010 ; Ge et al, 2012 ), particularly the dynamic changes of chemical composition (e.g., lignin, nonstructural carbohydrates) during rice root decomposition ( Lu et al, 2010 ; Park et al, 2020 ). However, microbial mechanisms underlying the coupling of carbon and nitrogen are poorly understood, though most studies have been done with respect to the root organic carbon (ROC) allocation (CO 2 , dissolved organic carbon, SOC, MBC) or the root-derived nitrogen release (NH 4 + , NO 3 – , dissolved organic nitrogen, gas N).…”

Section: Introductionmentioning

confidence: 99%

Methanotrophy Alleviates Nitrogen Constraint of Carbon Turnover by Rice Root-Associated Microbiomes

et al. 2022

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The bioavailability of nitrogen constrains primary productivity, and ecosystem stoichiometry implies stimulation of N2 fixation in association with carbon sequestration in hotspots such as paddy soils. In this study, we show that N2 fixation was triggered by methane oxidation and the methanotrophs serve as microbial engines driving the turnover of carbon and nitrogen in rice roots. 15N2-stable isotope probing showed that N2-fixing activity was stimulated 160-fold by CH4 oxidation from 0.27 to 43.3 μmol N g–1 dry weight root biomass, and approximately 42.5% of the fixed N existed in the form of 15N-NH4+ through microbial mineralization. Nitrate amendment almost completely abolished N2 fixation. Ecophysiology flux measurement indicated that methane oxidation-induced N2 fixation contributed only 1.9% of total nitrogen, whereas methanotrophy-primed mineralization accounted for 21.7% of total nitrogen to facilitate root carbon turnover. DNA-based stable isotope probing further indicated that gammaproteobacterial Methylomonas-like methanotrophs dominated N2 fixation in CH4-consuming roots, whereas nitrate addition resulted in the shift of the active population to alphaproteobacterial Methylocystis-like methanotrophs. Co-occurring pattern analysis of active microbial community further suggested that a number of keystone taxa could have played a major role in nitrogen acquisition through root decomposition and N2 fixation to facilitate nutrient cycling while maintaining soil productivity. This study thus highlights the importance of root-associated methanotrophs as both biofilters of greenhouse gas methane and microbial engines of bioavailable nitrogen for rice growth.

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“…The atmosphere CO 2 concentration has increased from 280 μmol mol –1 in the pre-industry times to 417 μmol mol –1 in November 2020 1 and is predicted to exceed 700 μmol mol –1 by the end of the twenty-first century ( IPCC,, 2014 ). As atmospheric CO 2 is the primary source of carbon (C) for plants, the ongoing increased CO 2 will act as a C fertilizer, resulting in an increase in biomass production in cereal crops ( Drag et al, 2020 ; Park et al, 2020 ; Tcherkez et al, 2020 ), vegetable crops ( Dong et al, 2020 ), perennial fruit crops ( Salazar-Parra et al, 2015 ), grass ( Xiao et al, 2016 ), and some perennial woody plants ( Maillard et al, 2001 ; Singh et al, 2019 ; Ahammed et al, 2020 ). The beneficial effect has led to a growing demand for macro- and micronutrients, including nitrogen (N), phosphorous (P), potassium (K), calcium (Ca), magnesium (Mg), etc., to match their increased C assimilation under elevated CO 2 (eCO 2 ), resulting in changes in crop quality and hence food nutrition ( Loladze, 2014 ; Kohler et al, 2019 ; Chumley and Hewlings, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Daytime, Not Nighttime, Elevated Atmospheric Carbon Dioxide Exposure Improves Plant Growth and Leaf Quality of Mulberry (Morus alba L.) Seedlings

et al. 2021

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Almost all elevated atmospheric CO2 concentrations (eCO2) studies have not addressed the potential responses of plant growth to different CO2 in daytime and nighttime. The present study was to determine the impact of daytime and/or nighttime eCO2 on growth and quality of mulberry (Morus alba L.), a perennial multipurpose cash plant. Six-month-old mulberry seedlings were hence grown in environmentally auto-controlled growth chambers under four CO2 concentrations: (1) ambient CO2 (ACO2, 410 μmol mol–1 daytime/460 μmol mol–1 nighttime), (2) sole daytime elevated CO2 (DeCO2, 710 μmol mol–1/460 μmol mol–1), (3) sole nighttime elevated CO2 (NeCO2, 410 μmol mol–1/760 μmol mol–1), and (4) continuous daytime and nighttime elevated CO2 (D + NeCO2, 710 μmol mol–1/760 μmol mol–1). Plant growth characteristics, nutrient uptake, and leaf quality were then examined after 120 days of CO2 exposure. Compared to control, DeCO2 and (D + N)eCO2 increased plant biomass production and thus the harvest of nutrients and accumulation of leaf carbohydrates (starch, soluble sugar, and fatty acid) and N-containing compounds (free amino acid and protein), though there were some decreases in the concentration of leaf N, P, Mg, Fe, and Zn. NeCO2 had no significant effects on leaf yield but an extent positive effect on leaf nutritional quality due to their concentration increase in leaf B, Cu, starch, and soluble sugar. Meanwhile, (D + N)eCO2 decreased mulberry leaf yield and harvest of nutritious compounds for silkworm when compared with DeCO2. The reason may be associated to N, P, Mg, Fe, and Zn that are closely related to leaf pigment and N metabolism. Therefore, the rational application of mineral nutrient (especially N, P, Fe, Mg, and Zn) fertilizers is important for a sustainable mulberry production under future atmosphere CO2 concentrations.

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Biomass, chemical composition, and microbial decomposability of rice root and straw produced under co-elevated CO2 and temperature

Cited by 14 publications

References 94 publications

Methane emission from soil surface during rice growth season under different temperature, fertilization, and rice straw input conditions

Methane emission from soil surface during rice growth season under different temperature, fertilization, and rice straw input conditions

Methanotrophy Alleviates Nitrogen Constraint of Carbon Turnover by Rice Root-Associated Microbiomes

Daytime, Not Nighttime, Elevated Atmospheric Carbon Dioxide Exposure Improves Plant Growth and Leaf Quality of Mulberry (Morus alba L.) Seedlings

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