Nitrogen levels regulate intercropping-related mitigation of potential nitrate leaching

doi:10.1016/j.agee.2021.107540

KIB OpenIR

	Nitrogen levels regulate intercropping-related mitigation of potential nitrate leaching
	Long,Guangqiang ; Li,Lianhua ; Wang,Ding ; Zhao,Ping ; Li Tang ; Zhou,Yanli ; Yin,Xinhua
	2021
发表期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
卷号	319 页码:107540
摘要	Intercropping improves yield and is broadly adopted worldwide; however, the risk and regulatory mechanism of nitrate leaching in intercropping compared with monocropping remain elusive. A fixed plot field experiment was conducted with three cropping patterns (maize monocropping, potato monocropping, and maize-potato intercropping) under four (nitrogen) N levels in Kunming, China during 2014-2017. Based on crop N uptake and soil nitrate transformation, the underlying mechanism of potential nitrate-N (NO3--N) leaching (NO3--N accumulation below the root layer) and N regulation was explored under intercropping and monocropping. The results showed that the area-scaled potential NO3--N leaching under intercropping was mitigated by 3.4-37.4%, with a mean of 15.8% relative to the weighted mean of maize- and potato-monocropping. Intercropping-related mitigation of potential NO3--N leaching was enhanced with increasing N level. Intercropping increased the ammonia-oxidizing archaea population and soil nitrification potential but had no significant impact on the abundance of ammonia-oxidizing bacteria and narG. Redundancy analysis and structural equation modeling indicated that soil water played a crucial role in regulating the intercropping-related mitigation of potential NO3--N leaching, while the improvement in N uptake by intercropped maize reduced the potential NO3--N leaching at low and medium N levels. The results highlight the intercropping advantage over monocropping in mitigating the risk of NO3--N leaching. This study provides insights into the environmental impacts of diversified cropping systems and regulating mechanisms.
关键词	Potential nitrate leaching Nitrification potential Intercropping N application Functional gene AMMONIA-OXIDIZING BACTERIA MAIZE PRODUCTION CROPPING SYSTEM WHEAT FERTILIZATION ARCHAEA YIELD SOIL DIVERSITY EMISSIONS
DOI	10.1016/j.agee.2021.107540
WOS记录号	WOS:000685518100010
引用统计	被引频次：23[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/151853/73002
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, Dept Plant Sci, Knoxville, TN 37996 USA
推荐引用方式 GB/T 7714	Long,Guangqiang,Li,Lianhua,Wang,Ding,et al. Nitrogen levels regulate intercropping-related mitigation of potential nitrate leaching[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2021,319:107540.
APA	Long,Guangqiang.,Li,Lianhua.,Wang,Ding.,Zhao,Ping.,Li Tang.,...&Yin,Xinhua.(2021).Nitrogen levels regulate intercropping-related mitigation of potential nitrate leaching.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,319,107540.
MLA	Long,Guangqiang,et al."Nitrogen levels regulate intercropping-related mitigation of potential nitrate leaching".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 319(2021):107540.