Mathematical modelling of water and solute movement in ridged versus flat planting systems
Mathematical modelling of water and solute movement in ridged versus flat planting systems
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脊状与平状种植系统中水和溶质运动的数学模型
DOI：
10.1111/ejss.12711
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发表时间：
2018
影响因子：
4.2
通讯作者：
Duncan S
中科院分区：
文献类型：
--
作者：
Duncan S
我们用数学模型比较了垄沟和平地土壤中水分和溶质的运移。我们重点研究了两个物理过程：根系吸水和池塘形成对土壤表面的影响。数学模型描述了溶质运移、水运动和表面池塘深度之间的相互作用。数值模拟被用来确定不同迁移率和降解率的溶质在一个生长季节如何渗透到两种土壤几何形状中。垄沟或平坦的土壤几何形状都可以减少溶质的淋失，但这取决于几个因素。在施加溶质后立即降雨是决定溶质渗透入土壤的关键因素。在施溶质后有延迟降雨的情况下，垄沟几何形状的溶质聚集在靠近根系的地方，导致与平坦土壤几何形状相比，溶质渗透性降低。相反，在施加溶质后立即下大雨会导致积水，其中水分渗透是主要的运输机制。与平坦的土壤相比，垄沟土壤中的溶质渗透增加。亮点：我们研究了垄沟和平地土壤中的溶质运动受积水控制的情况。我们发现，与平坦的土壤相比，垄作土壤可以阻碍或增加淋溶。由于根系对水分的吸收，在垄沟土壤中形成了溶质热点。
SummaryWe compared water and solute movement between a ridge and furrow geometry and that of flat soil with a mathematical model. We focused on the effects of two physical processes: root water uptake and pond formation on the soil surface. The mathematical model describes the interaction between solute transport, water movement and surface pond depth. Numerical simulations were used to determine how solutes of varying mobility and rates of degradation penetrated into the two soil geometries over a growing season. Both the ridge and furrow or flat soil geometries could reduce solute leaching, but this depended on several factors. Rain immediately after a solute application was a key factor in determining solute penetration into soil. In cases with delayed rain after a solute application, solutes in ridge and furrow geometries collected adjacent to the root system, resulting in reduced solute penetration compared to the flat soil geometry. In contrast, substantial rain immediately after a solute application resulted in ponding where water infiltration acted as the dominant transport mechanism. This resulted in increased solute penetration in the ridge and furrow geometry compared to the flat soil geometry.HighlightsWe studied solute movement controlled by ponding in ridge and furrow and flat fields.We found the ridged soil could impede or increase leaching compared to the flat soil.Solute hot‐spots formed in ridge and furrow soil because of root water uptake.Time between solute application and rainfall is a key factor for solute penetration.
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影响因子：
5.8
作者：
Fahong, W;Wang, X;Sayre, K
通讯作者：
Sayre, K
DOI：
--
发表时间：
2008
期刊：
American Potato Journal
影响因子：
--
作者：
P. Gandar;C. B. Tanner
通讯作者：
C. B. Tanner
宽床马铃薯生产：对产量和所选土壤物理特性的影响
影响因子：
1.5
作者：
C. Mundy;N. Creamer;C. Crozier;L. G. Wilson
通讯作者：
L. G. Wilson
影响因子：
2.1
作者：
G. A. Lehrsch;R. Sojka;D. Westermann
通讯作者：
G. A. Lehrsch;R. Sojka;D. Westermann
垄耕下水和阴离子的运动：田间研究。
DOI：
--
发表时间：
1990
期刊：
影响因子：
--
作者：
J. Hamlett;J. Baker;R. Horton
通讯作者：
R. Horton