Pérez-Rodríguez P, Soto-Gómez D, López-Periago J E, Paradelo M
Área de Edafoloxía e Química Agrícola, Departamento de Bioloxía Vexetal e Ciencias do Solo, Facultade de Ciencias, Universidad de Vigo, 32004 Ourense, Spain; SIMBIOS Centre, University of Abertay Dundee, Kydd Building, 40 Bell Street, Dundee DD1 1HG, Scotland, UK.
Área de Edafoloxía e Química Agrícola, Departamento de Bioloxía Vexetal e Ciencias do Solo, Facultade de Ciencias, Universidad de Vigo, 32004 Ourense, Spain.
J Environ Manage. 2015 Mar 1;150:472-478. doi: 10.1016/j.jenvman.2014.12.036. Epub 2015 Jan 2.
Copper lost in foliar wash-off from vine leaves treated with Cu-based fungicides was analyzed with a single-drop rainfall simulator. The temporal losses of the particulate Cu (CuP) and the solution Cu (CuS) from raindrop strikes on leaves were modeled using a Poisson point process. This model estimated maximum detachment rates of 0.82 ng CuP and 0.033 ng CuS per raindrop. The total amount of Cu (CuT) in the leaves before rainfall ranged between 0.4 and 4.4 g Cu kg(-1) dry weight. Wash-off reduced the amount of CuT present in the leaves by 0.6 g kg(-1). Particulate losses of CuT ranged from 75 to 90%, while soluble losses of CuT ranged from 10 to 25%. The kinetic energy of the raindrops influenced the loss of CuS but not the loss of CuP. The Poisson point approach can provide an interesting starting point to model non-point source pollution produced from agricultural chemicals washed-off by rain.
使用单滴降雨模拟器分析了用铜基杀菌剂处理过的葡萄叶片叶面冲洗流失的铜。利用泊松点过程对雨滴撞击叶片造成的颗粒态铜（CuP）和溶解态铜（CuS）的随时间流失情况进行了建模。该模型估计每滴雨滴的最大脱离率为0.82纳克CuP和0.033纳克CuS。降雨前叶片中铜（CuT）的总量在0.4至4.4克铜/千克干重之间。冲洗使叶片中CuT的含量减少了0.6克/千克。CuT的颗粒态流失率在75%至90%之间，而溶解态流失率在10%至25%之间。雨滴的动能影响CuS的流失，但不影响CuP的流失。泊松点方法可为模拟雨水冲刷农业化学品产生的非点源污染提供一个有趣的起点。
