Nitrogen fertilization overweighs intercropping in promotion of dissolved organic carbon concentration and complexity in potato-cropped soil

doi:10.1007/s11104-021-04876-2

KIB OpenIR

	Nitrogen fertilization overweighs intercropping in promotion of dissolved organic carbon concentration and complexity in potato-cropped soil
	Wang,Ding ; Zhao,Ping ; Xiang,Rui ; He,Shuran ; Zhou,Yanli ; Yin,Xinhua ; Long,Guangqiang
	2021
发表期刊	PLANT AND SOIL
ISSN	0032-079X
卷号	462 期号:1-2 页码:273-284
摘要	Aims Intercropping promoted land productivity and be performed worldwide. This study aimed to assess the effect of intercropping on soil dissolved organic carbon (DOC) and its nitrogen (N) regulation. Methods The potato was monocropped and intercropped with maize under four N levels (0, 62.5, 125 and 187.5 kg ha(-1) for N0, N1, N2 and N3, respectively) in a fixed plot experiment from 2014 in subtropical China. Soil DOC concentration was determined and seasonal and interannual dynamics were analyzed from 2016 to 2018; Absorption values of specified wavelength were selected to characterize the annul DOC composition. Finally, the driving factors of DOC variation were explored using structural equation modeling (SEM). Results Soil DOC concentration and accumulation under N-applied treatments were higher than N0 and the increase peaked at N1. Compared with monocropping, intercropping significantly increased DOC accumulation by 20.29% only at N0. N application significantly improved the contents of amines and aromatic compounds and the average molecular weight of DOC, thus improving the degree of humification and aromatization of soil DOC. The SEM showed that the chemical composition of DOC was complicated with increasing soil temperature, aboveground and root biomass, while DOC concentration and chemical composition significantly affected the accumulation of DOC. Conclusions Agricultural diversified cropping affects the dynamics and composition of soil DOC, which is intensively regulated by N fertilization. This study expands the insight into the variable DOC concentration and composition and its role in soil organic carbon turnover under the varying fertilization and cropping patterns.
关键词	Soil DOC Chemical structure N application rates Potato Agricultural diversified cropping
DOI	10.1007/s11104-021-04876-2
WOS记录号	WOS:000616472000002
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73442
专题	中国科学院昆明植物研究所
作者单位	1.Yunnan Agr Univ, Minist Agr & Rural Affairs, Yunnan Sci Observat Stn Cultivated Land Conservat, Kunming 650201, Yunnan, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Plant Germplasm & Genom Ctr, 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,Zhao,Ping,Xiang,Rui,et al. Nitrogen fertilization overweighs intercropping in promotion of dissolved organic carbon concentration and complexity in potato-cropped soil[J]. PLANT AND SOIL,2021,462(1-2):273-284.
APA	Wang,Ding.,Zhao,Ping.,Xiang,Rui.,He,Shuran.,Zhou,Yanli.,...&Long,Guangqiang.(2021).Nitrogen fertilization overweighs intercropping in promotion of dissolved organic carbon concentration and complexity in potato-cropped soil.PLANT AND SOIL,462(1-2),273-284.
MLA	Wang,Ding,et al."Nitrogen fertilization overweighs intercropping in promotion of dissolved organic carbon concentration and complexity in potato-cropped soil".PLANT AND SOIL 462.1-2(2021):273-284.