气候变化领域集成服务门户(CCPortal): Variability in decomposition rate of sorghum cultivar residues linked to lignin content

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DOI	10.1016/j.rhisph.2024.100850
	Variability in decomposition rate of sorghum cultivar residues linked to lignin content
	Ntonta, S.; Zengeni, R.; Muchaonyerwa, P.; Chaplot, V.
发表日期	2024
EISSN	2452-2198
起始页码	29
卷号	29
英文摘要	Crop residue decomposability in soils is of major importance for maintaining soil carbon (C) stocks and nitrogen (N) mineralization, which are vital for soil fertility and climate change mitigation. The impact of biochemical quality on decomposition and N mineralization of sorghum cultivars and/or crop residue parts is not well documented. In the present study, field and laboratory experiments spanning 168 and 120 days, respectively, were used to assess the rate of decomposition and N mineralization in soils from five sorghum cultivars and to relate the results with residue quality (i.e. lignin: N ratio) over time. High-quality cultivars (i.e., Mamolokwane and OS-Potch) exhibit rapid decomposition (>50% DM loss) and elevated carbon dioxide emissions in shoots, attributed to a low lignin-to-nitrogen ratio. Low-quality residues (i.e., AS8 and KZ5246) initially undergo net nitrogen immobilization, transitioning to mineralization at later stages. Notably, shoots consistently release more nitrogen than roots, with distinct NO3 -N mineralization values ranging from 22.7 to 11.5 mg N/kg for OS-Potch and KZ5246 shoots and 20.6 to 9.3 mg N/kg for their root residues. Results suggest that low-quality sorghum residues, particularly KZ5246 and AS8 roots, release carbon and nitrogen at a slower rate, providing potential for carbon storage and limited nitrogen availability compared to high-quality residues like OS-Potch shoots.
英文关键词	Decomposition; Residue quality; Carbon emissions; Carbon storage; Nutrient cycling
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:001175740900001
来源期刊	RHIZOSPHERE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298383
作者单位	University of Kwazulu Natal; Institut Polytechnique de Paris; Ecole Polytechnique; Sorbonne Universite; Institut de Recherche pour le Developpement (IRD); Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute for Earth Sciences & Astronomy (INSU); Museum National d'Histoire Naturelle (MNHN)
推荐引用方式 GB/T 7714	Ntonta, S.,Zengeni, R.,Muchaonyerwa, P.,et al. Variability in decomposition rate of sorghum cultivar residues linked to lignin content[J],2024,29.
APA	Ntonta, S.,Zengeni, R.,Muchaonyerwa, P.,&Chaplot, V..(2024).Variability in decomposition rate of sorghum cultivar residues linked to lignin content.RHIZOSPHERE,29.
MLA	Ntonta, S.,et al."Variability in decomposition rate of sorghum cultivar residues linked to lignin content".RHIZOSPHERE 29(2024).