Intercropping and N application enhance soil dissolved organic carbon concentration with complicated chemical composition

doi:10.1016/j.still.2021.104979

KIB OpenIR

	Intercropping and N application enhance soil dissolved organic carbon concentration with complicated chemical composition
	Wang,Ding ; Yi,Wenbo ; Zhou,Yanli ; He,Shuran ; Tang,Li ; Yin,Xinhua ; Zhao,Ping ; Long,Guangqiang
	2021
发表期刊	SOIL & TILLAGE RESEARCH
ISSN	0167-1987
卷号	210 页码:104979
摘要	Soil dissolved organic carbon (DOC) plays a critical role in migration and transformation of soil organic carbon. For revealing effects of intercropping and N application on dynamics of DOC concentration and chemical structure, a multi-year located field experiment with cropping patterns (maize monocropping and maize-potato intercropping) subjected to four N levels (0 kg ha-1, 125 kg ha-1, 250 kg ha-1, 375 kg ha-1) was conducted. The results showed that N application raised DOC concentration while DOC accumulation, had a quadratic relationship with N application rate during the entire growth period of maize. At the same N level, intercropping increased the concentration and accumulation of DOC compared with monocropping. Meanwhile N application promoted the contents of amines and aromatic compounds and average molecular weight of DOC molecules, which reached the highest value at rate of 125 kg N ha-1. Compared with monocropping at the same N level, there was a tendency to increase the content of amines and aromatic compounds and the average molecular weight of DOC in intercropping, thus improving the degree of humification and aromatization of soil DOC. Soil temperature, water content and NH4+-N were the main factors mediating DOC concentration, while DOC concentration and soil temperature significantly affected the chemical structure of DOC. The structural equation model showed intercropping and N application elevated soil DOC concentration by increasing soil temperature, litter and root biomass, and the improvement of DOC concentration and soil temperature further enhanced the average molecular weight of DOC, resulting in accumulation of DOC.
关键词	DOC Accumulation amount Functional group N application rates Intercropped maize Soil temperature NITROGEN ADDITIONS MATTER
DOI	10.1016/j.still.2021.104979
WOS记录号	WOS:000641358800003
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73018
专题	中国科学院昆明植物研究所
作者单位	1.Yunnan Agr Univ, Yunnan Sci Observat Stn Cultivated Land Conservat, Minist Agr & Rural Affairs, Kunming 650201, Yunnan, Peoples R China 2.Chinese Acad Sci, Plant Germplasm & Genom Ctr, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China 3.Univ Tennessee, Dev Plant Sci, Knoxville, TN 37996 USA
推荐引用方式 GB/T 7714	Wang,Ding,Yi,Wenbo,Zhou,Yanli,et al. Intercropping and N application enhance soil dissolved organic carbon concentration with complicated chemical composition[J]. SOIL & TILLAGE RESEARCH,2021,210:104979.
APA	Wang,Ding.,Yi,Wenbo.,Zhou,Yanli.,He,Shuran.,Tang,Li.,...&Long,Guangqiang.(2021).Intercropping and N application enhance soil dissolved organic carbon concentration with complicated chemical composition.SOIL & TILLAGE RESEARCH,210,104979.
MLA	Wang,Ding,et al."Intercropping and N application enhance soil dissolved organic carbon concentration with complicated chemical composition".SOIL & TILLAGE RESEARCH 210(2021):104979.