Neutron radiography as a tool for revealing root development in soil: capabilities and limitations
Neutron radiography as a tool for revealing root development in soil: capabilities and limitations
复制标题
DOI：
10.1007/s11104-008-9834-7
复制
发表时间：
2009-05-01
期刊：
影响因子：
4.9
通讯作者：
Schulin, Rainer
中科院分区：
文献类型：
--
作者：
Moradi, Ahmad B.;Conesa, Hector M.;Schulin, Rainer
中子射线照相（NR）是研究土壤中原位根系发育的一种有价值的非侵入性工具。然而，关于其功能和局限性的定量信息存在缺陷。我们将中子射线照相与图像分析技术相结合，在存在和不存在具有各种生根系统的植物根的情况下，量化各种根生长介质在一定范围的含水量（theta）下的中子吸收系数（I）磅。植物生长在铝制容器（170 x 150 x 12 毫米）中，并使用 NR、X 射线照相术和光学扫描仪进行成像。沙土是 NR 的最佳介质，因为它支持植物在 θ 方向生长，为根系可视化提供了良好的对比度。经过中子散射校正后，我们得到了 I磅和土壤θ之间的线性相关性。在这些容器中，中子射线照片中可检测到的最小根部厚度为 0.2 毫米。将 NR 与 X 射线照相相结合，除了揭示根系结构和发育之外，还可以提供有关土壤结构的信息。
Neutron Radiography (NR) is a valuable non-invasive tool to study in situ root development in soil. However, there is a lacuna of quantitative information on its capabilities and limitations. We combined neutron radiography with image analysis techniques to quantify the neutron absorption coefficients (I ) pound of various root-growth media for a range of water contents (theta) in the presence and absence of plant roots with various rooting systems. Plants were grown in aluminium containers (170 x 150 x 12 mm) and were imaged using NR, as well as X-Ray radiography and an optical scanner. Sandy soil was the best medium for NR because it supported plant growth at theta that gave a good contrast for root visualisation. After correction for neutron scattering, we obtained a linear correlation between I pound and soil theta. The minimum detectable root thickness in neutron radiographs was found to be 0.2 mm in these containers. Combining NR with X-Ray radiography could provide information on soil structure in addition to revealing root structure and development.