Data on glyphosate and aminomethylphosphonic acid (AMPA) concentrations over time at different depths in a sandy soil from Macquarie Island.

Data on glyphosate and aminomethylphosphonic acid (AMPA) concentrations over time at different depths in a sandy soil from Macquarie Island. There are 2 files providing data on residual glyphosate and its derivative aminomethylphosphonic acid (AMPA) concentrations remaining in soil over time at different depths in a common sandy soil from Macquarie Island. These data result from a leaching experiment using 20 cm deep soil columns collected from MI and returned to the University of New England for testing. Glyphosate was applied to the surface of the columns at the recommended rate of 1.5 kg/ha and then the columns were leached with water simulating MI rainfall, and over a period of 48 weeks individual columns were subsampled on several occasions at 4 depths (0-5, 5-10, 10-15 and 15-20 cm) for glyphosate and AMPA to determine potential for herbicide residues of glyphosate on MI. The first file provides summary statistics of the results while the second file contains the raw data for all replicates and the controls. More detailed methods are provided in the PhD thesis of Laura Williams (University of New England, 2016). Laura analysed the leachates from these columns in a previous project (4158) while residue analysis was undertaken in this project by PhD student Kirsten Drew.Soils (100 intact cores (60 mm diameter x 200 mm) from a range of field sites infested with S. media – GPS referenced) collected from MI and returned to UNE. A replicated, multi-factorial incubation trial conducted in the sub-Antarctic growth chamber to investigate the interactive effects of soil type, herbicide type and incubation period on herbicide fate.本数据集包含麦夸里岛（Macquarie Island，下文简称MI）沙质土壤中不同深度处草甘膦（glyphosate）及其代谢物氨甲基膦酸（aminomethylphosphonic acid, AMPA）随时间变化的浓度数据。 本数据集包含两个数据文件，均记录了MI典型沙质土壤中不同深度处残留草甘膦及其代谢物氨甲基膦酸随时间变化的浓度数据。该数据源自淋溶实验：研究人员从MI采集20厘米深的土柱，运回新英格兰大学（University of New England，下文简称UNE）开展检测。实验中，研究人员以推荐剂量1.5 kg/ha将草甘膦施用于土柱表面，随后使用模拟MI降雨的淋溶水对土柱进行淋溶。在48周的实验周期内，研究人员多次对单根土柱进行分层取样，取样深度分为4组：0-5 cm、5-10 cm、10-15 cm及15-20 cm，以检测草甘膦和AMPA的残留量，评估MI草甘膦除草剂残留的潜在风险。第一个文件包含实验结果的描述性统计数据，第二个文件则包含所有重复组与对照组的原始实验数据。更详细的实验方法可参考劳拉·威廉姆斯（Laura Williams）2016年于UNE提交的博士学位论文。劳拉曾在先前的项目（编号4158）中对这些土柱的淋滤液进行过分析，而本项目中的残留物分析则由博士生柯尔斯滕·德鲁（Kirsten Drew）完成。 研究人员从MI多个受S. media侵染的野外样地采集了100个原状土柱（直径60 mm × 高度200 mm，已通过GPS定位），并运回UNE。实验在亚南极生长箱中开展了重复多因素培养试验，以探究土壤类型、除草剂类型及培养时长对除草剂归趋的交互影响。