Effects of 12-Year Nitrogen Addition and Mowing on Plant-Soil Micronutrients in a Typical Steppe

doi:10.3390/plants11223042

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	Effects of 12-Year Nitrogen Addition and Mowing on Plant-Soil Micronutrients in a Typical Steppe
	Niu, Guoxiang 4; Wang, Yinliu 3; Dai, Guangyi 2,4; Xie, Siwei 1; Jin, Yiqian 6; Yang, Junjie 3; Huang, Jianhui 3
刊名	PLANTS-BASEL
	2022
卷号	11 期号:22
关键词	nitrogen deposition mowing micronutrient cycling plant nutrition Mongolian Plateau
DOI	10.3390/plants11223042
文献子类	Article
英文摘要	Changes in soil micronutrient availability may have adverse consequences on grassland productivity, yet it's still largely unclear how concurrent human practices, such as fertilization and mowing, affect micronutrient cycling in the plant-soil systems. Here, we measured six essential micronutrient (Fe, Mn, Cu, Zn, Co and Mo) contents in both plant pool (separated as aboveground plant parts, litter, and belowground roots) at the community level and soil pool (0-10 cm depth) after 12-year consecutive nitrogen (N) addition (0, 2, 10, and 50 g N m(-2) year(-1)) and mowing in a typical steppe of the Mongolian Plateau. The results show that (i) medium-N (10 g m(-2) year(-1)) and high-N (50 g m(-2) year(-1)) addition rates significantly increased contents of soil-available Fe (+310.0%, averaging across the two N addition rates), Mn (+149.2%), Co (+123.6%) and Mo (+73.9%) irrespective of mowing treatment, whereas these addition treatments usually decreased contents of soil total Fe (-8.9%), Mn (-21.6%), Cu (-15.9%), Zn (-19.5%), Co (-16.4%) and Mo (-34.7%). (ii) Contents of Fe in aboveground plant parts, litter, and roots significantly decreased, whereas plant Mn increased with N addition. Contents of above ground plant Cu, Zn, Co, and Mo significantly decreased at high-N addition rate, whereas contents of micronutrients in roots and litters, except for Fe, generally increased with N addition. Moreover, the total amount of micronutrients in the plant pool (contents x biomass) significantly increased at the medium-N addition rate but decreased at the high-N addition rate. All N addition rates significantly enlarged the pool of litter micronutrients, and roots could hold more micronutrients under N addition, especially combined with mowing treatment. Importantly, although mowing could regulate the effects of N addition on variables (i) and (ii), the effects were weaker overall than those of N addition. (iii) Changes in root micronutrients, except for Mn, could explain corresponding changes in plant micronutrients (R-2: 0.19-0.56, all p < 0.01), and significant linear correlations were also observed between soil-available Fe and Fe in plant and roots. Aboveground plant Mn was significantly correlated with soil-available Mn, while Co and Mo in roots were also significantly correlated with soil-available Co and Mo. These results indicate that soil micronutrient supply capacity may decrease due to a decrease in total micronutrient contents after long-term N addition and mowing. They also suggest that different magnitude responses of soil micronutrients in plants (i.e., litters, roots) and soil should be considered when comprehensively examining nutrient cycling in grassland ecosystems.
学科主题	Plant Sciences
电子版国际标准刊号	2223-7747
出版地	BASEL
WOS关键词	GRASSLAND ; FERTILIZATION ; DEPOSITION ; SYSTEMS ; CARBON ; COPPER ; CHINA ; IRON
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	MDPI
WOS记录号	WOS:000887656600001
资助机构	China Postdoctoral Science Foundation [2022M713196] ; National Natural Science Foundation of China [31870440]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28810]
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Opening Publ Lab, South China Bot Garden, Guangzhou 510650, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.South China Natl Bot Garden, Guangzhou 510650, Peoples R China 4.Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Peoples R China 5.South China Normal Univ, Int Dept, High Sch, Guangzhou 510650, Peoples R China 6.Univ Strathclyde, Coll Sci, Glasgow G4 OLZ, Lanark, Scotland
推荐引用方式 GB/T 7714	Niu, Guoxiang,Wang, Yinliu,Dai, Guangyi,et al. Effects of 12-Year Nitrogen Addition and Mowing on Plant-Soil Micronutrients in a Typical Steppe[J]. PLANTS-BASEL,2022,11(22).
APA	Niu, Guoxiang.,Wang, Yinliu.,Dai, Guangyi.,Xie, Siwei.,Jin, Yiqian.,...&Huang, Jianhui.(2022).Effects of 12-Year Nitrogen Addition and Mowing on Plant-Soil Micronutrients in a Typical Steppe.PLANTS-BASEL,11(22).
MLA	Niu, Guoxiang,et al."Effects of 12-Year Nitrogen Addition and Mowing on Plant-Soil Micronutrients in a Typical Steppe".PLANTS-BASEL 11.22(2022).