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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. |
| 关键词 | Chlorine compoundsNitrogenOxalic acidSoilsAdditional experimentsAmmonium chlorideCalcium releaseCalcium uptakesDry matter productionEucalyptus grandisEucalyptus urograndisSoil acidificationsCalciumammoniumbiological uptakecalciumchlorideion exchangeplantation forestrysoil nutrientCalciumEucalyptus UrophyllaExperimentationPlantsReleaseSoilStabilitySupplyEucalyptus grandisEucalyptus urograndisEucalyptus urophylla |
| 语种 | 英语 |
| 来源机构 | Forest Ecology and Management |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/132848 |
| 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]. Forest Ecology and Management,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.,465. |
| MLA | Santos M.A.D.,et al."Ammonium nitrogen increases Ca uptake from non-exchangeable reservoirs by eucalypt plants".465(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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