期刊
VADOSE ZONE JOURNAL
卷 18, 期 1, 页码 -出版社
WILEY
DOI: 10.2136/vzj2019.01.0002
关键词
-
资金
- Agriculture and Agri-Food Canada via the Natural Sciences and Engineering Research Council of Canada Visiting Fellowship Program
Macropores can be important conduits for surface-derived nutrients to reach subsurface receptors. Accordingly, nutrient reactive transport processes in macroporous soils need to be well understood. In this study, steady-state two-dimensional reactive transport simulations with MIN3P-THCm (version 1.0.519.0) were used to elucidate how soil macropore connectivity to tile drains can influence N transformations following liquid swine manure (LSM) applications to soil. Four different soil scenarios were considered: homogeneous sand, homogeneous clay loam, and clay loam with discrete macropores connected to or disconnected from the bottom boundary used to represent tile drain outflow. In relation to the homogeneous soils, macropores, overall, facilitated chemical diffusion into the adjacent soil matrix along their length and broadly augmented O(2 )ingress into the soil profile. These processes combined to critically control the spatial distribution of NH4+ oxidation reaction products. When used in transient simulation mode with field data observed at experimental tile-drained plots that received LSM application, the model showed that simulated nitrate mass losses to tile are considerably higher and most realistic under the connected macropore scenario compared with the homogeneous or disconnected macropore scenarios.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据