气候变化领域集成服务门户(CCPortal): Ammonium nitrogen increases Ca uptake from non-exchangeable reservoirs by eucalypt plants

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DOI	10.1016/j.foreco.2020.118062
	Ammonium nitrogen increases Ca uptake from non-exchangeable reservoirs by eucalypt plants
	Santos M.A.D.; Valadares R.V.; Neves J.C.L.; Silva I.R.D.; Tótola M.R.; Costa M.D.
发表日期	2020
ISSN	0378-1127
卷号	465
英文摘要	Eucalypt plants can take up calcium (Ca) from soils with nondetectable levels of exchangeable Ca2+. This suggests the operation of unknown processes capable of rendering non-exchangeable forms of the nutrient available to eucalypts. An explanatory hypothesis for this phenomenon is that soil acidification by ammonium can release Ca from Ca-oxalate and soil minerals. Therefore, the objective of this work was to study the interactions between Ca-oxalate and ammonium on Ca and N nutrition of a Eucalyptus grandis × Eucalyptus urophylla hybrid (Eucalyptus urograndis) in a soil with nondetectable exchangeable Ca2+. For this, E. urograndis seedlings (clone AEC 144) were grown in pots with soil fertilized with the combination of five Ca doses (0, 0.10, 0.20, 0.40, and 0.80 cmolc/kg) as Ca-oxalate, and five N doses (0, 25, 50, 100, and 200 mg/kg) as NH4Cl. The experiment was conducted in a greenhouse for 60 days. Two additional experiments were conducted to verify the stability of Ca-oxalate at different doses in the soil along an incubation time of 60 days and at different soil pH. E. urograndis dry matter production and Ca and N uptake were highly dependent on ammonium applied to the soil, but only slightly influenced by Ca-oxalate. When no Ca-oxalate was added, Ca from a non-exchangeable source was transferred to E. urograndis. This transfer increased with increasing ammonium supply, stabilizing at the highest N dose applied. Ca-oxalate solubilization in the soil without E. urograndis plants ranged from 62 to 94% after 60 days of soil incubation and the release of Ca from Ca-oxalate did not change as a function of pH. In general, the release of Ca from Ca-oxalate presented two behaviors: pH-independent (trial without plants) and pH/NH4 +-dependent (trial with plants). This is the first report demonstrating that ammonium lead to the mobilization of non-exchangeable Ca reservoirs by E. urograndis plants cultivated in a soil with no exchangeable Ca. © 2020 Elsevier B.V.
英文关键词	Ammonium chloride; Calcium release; Calcium uptake; Exchangeable calcium; Non-exchangeable calcium
语种	英语
scopus关键词	Chlorine compounds; Nitrogen; Oxalic acid; Soils; Additional experiments; Ammonium chloride; Calcium release; Calcium uptakes; Dry matter production; Eucalyptus grandis; Eucalyptus urograndis; Soil acidifications; Calcium; ammonium; biological uptake; calcium; chloride; ion exchange; plantation forestry; soil nutrient; Calcium; Eucalyptus Urophylla; Experimentation; Plants; Release; Soil; Stability; Supply; Eucalyptus grandis; Eucalyptus urograndis; Eucalyptus urophylla
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155311
作者单位	Universidade Federal de Viçosa, Departamento de Fitotecnia, Viçosa, Minas Gerais CEP 36570-900, Brazil; Universidade Estadual de Campinas, Núcleo Interdisciplinar de Planejamento Energético, Campinas, São Paulo CEP 13083-730, Brazil; Universidade Federal de Viçosa, Departamento de Solos, Viçosa, Minas Gerais CEP 36570-900, Brazil; Universidade Federal de Viçosa, Departamento de Microbiologia, Viçosa, Minas Gerais CEP 36570-900, Brazil; Bolsista da Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) (process N° 2018/24707-0), Brazil; Bolsista Pesquisador do Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq, Brasília, DF, Brazil
推荐引用方式 GB/T 7714	Santos M.A.D.,Valadares R.V.,Neves J.C.L.,et al. Ammonium nitrogen increases Ca uptake from non-exchangeable reservoirs by eucalypt plants[J],2020,465.
APA	Santos M.A.D.,Valadares R.V.,Neves J.C.L.,Silva I.R.D.,Tótola M.R.,&Costa M.D..(2020).Ammonium nitrogen increases Ca uptake from non-exchangeable reservoirs by eucalypt plants.Forest Ecology and Management,465.
MLA	Santos M.A.D.,et al."Ammonium nitrogen increases Ca uptake from non-exchangeable reservoirs by eucalypt plants".Forest Ecology and Management 465(2020).