气候变化领域集成服务门户(CCPortal): Long-term successive biochar application increases plant lignin and microbial necromass accumulation but decreases their contributions to soil organic carbon in rice-wheat cropping system

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DOI	10.1111/gcbb.13137
	Long-term successive biochar application increases plant lignin and microbial necromass accumulation but decreases their contributions to soil organic carbon in rice-wheat cropping system
	Chen, Zhaoming; He, Lili; Ma, Jinchuan; Ma, Junwei; Ye, Jing; Yu, Qiaogang; Zou, Ping; Sun, Wanchun; Lin, Hui; Wang, Feng; Zhao, Xu; Wang, Qiang
发表日期	2024
ISSN	1757-1693
EISSN	1757-1707
起始页码	16
结束页码	6
卷号	16 期号:6
英文摘要	Biochar application is widely recognized as an effective approach for increasing soil organic carbon (SOC) and mitigating climate change in agroecosystems. However, the effects of biochar application on net accumulations and relative contributions of different SOC sources remain unclear. Here, we explored the effects of biochar application on plant-derived (PDC) and microbial necromass C (MNC) in a 10-year experimental rice-wheat rotation field receiving four different intensities of biochar application (0, 2.25, 11.5, and 22.5 t ha-1 for each crop season), using phospholipid fatty acids (PLFAs), lignin phenols and amino sugars as biomarkers of microbial biomass, PDC and MNC, respectively. Our results showed that biochar application increased SOC content and stock by 32.6%-203% and 26.4%-145%, respectively. Higher biochar application (11.5 and 22.5 t ha-1) increased soil pH, total nitrogen (TN), total phosphorus (TP), SOC/TN, and root biomass. In addition, higher biochar application enhanced bacterial, fungal, and total microbial biomass. Plant lignin phenols and MNC contents significantly increased, whereas their contributions to SOC significantly decreased with the increase in biochar application rates due to the disproportionate increase in PDC and MNC, and SOC. Fungal necromass had a greater contribution to SOC than bacterial necromass. The fungal/bacterial necromass decreased from 2.56 to 2.26 with increasing biochar application rates, because of the higher abundances of bacteria than that of fungi as indicated by PLFAs under higher biochar application rates. Random forest analyses revealed that pH, TP, and SOC/TN were the main factors controlling plant lignin and MNC accumulation. Structural equation modeling revealed that biochar application increased lignin phenols by stimulating root biomass, whereas enhanced MNC accumulation was primarily from increased microbial biomass and lignin phenols. Overall, our findings suggest that biochar application increases the accumulation of the two SOC sources but decreases their contributions to SOC in paddy soils. Long-term successive biochar application increases lignin phenols accumulation by stimulating root biomass, whereas biochar application enhanced microbial necromass by increasing microbial biomass and plant lignin. Long-term biochar application decreases the contributions of plant lignin and microbial necromass to soil organic carbon in paddy soils.image
英文关键词	amino sugars; biochar; lignin phenols; microbial necromass; paddy field; soil organic carbon
语种	英语
WOS研究方向	Agriculture ; Biotechnology & Applied Microbiology ; Energy & Fuels
WOS类目	Agronomy ; Biotechnology & Applied Microbiology ; Energy & Fuels
WOS记录号	WOS:001209358000001
来源期刊	GLOBAL CHANGE BIOLOGY BIOENERGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305931
作者单位	Zhejiang Academy of Agricultural Sciences; Chinese Academy of Sciences; Nanjing Institute of Soil Science, CAS
推荐引用方式 GB/T 7714	Chen, Zhaoming,He, Lili,Ma, Jinchuan,et al. Long-term successive biochar application increases plant lignin and microbial necromass accumulation but decreases their contributions to soil organic carbon in rice-wheat cropping system[J],2024,16(6).
APA	Chen, Zhaoming.,He, Lili.,Ma, Jinchuan.,Ma, Junwei.,Ye, Jing.,...&Wang, Qiang.(2024).Long-term successive biochar application increases plant lignin and microbial necromass accumulation but decreases their contributions to soil organic carbon in rice-wheat cropping system.GLOBAL CHANGE BIOLOGY BIOENERGY,16(6).
MLA	Chen, Zhaoming,et al."Long-term successive biochar application increases plant lignin and microbial necromass accumulation but decreases their contributions to soil organic carbon in rice-wheat cropping system".GLOBAL CHANGE BIOLOGY BIOENERGY 16.6(2024).