文献类型： 外文期刊
作者： Melland, Alice R. 1 ; Silburn, D. Mark 1 ; McHugh, Allen D. 3 ; Fillols, Emilie 4 ; Rojas-Ponce, Samuel 2 ; Baillie 1 ;
作者机构： 1.Univ So Queensland, Natl Ctr Engn Agr, Toowoomba, Qld 4350, Australia
2.Queensland Govt, Dept Nat Resources & Mines, Toowoomba, Qld 4350, Australia
3.Ningxia Acad Agr & Forestry Sci, Int Maize & Wheat Improvement Ctr CIMMYT, Ningxia, Peoples R China
4.Sugar Res Australia Ltd, Te Kowai, Qld 4740, Australia
5.James Cook Univ, TropWATER, Catchment Reef Res Grp, Townsville, Qld 4811, Australia
关键词： pesticide;water quality;sugar cane;precision spraying;postemergent;pre-emergent;sediment-water partition coefficient
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）
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收录情况： SCI
摘要： Rainfall simulator trials were conducted on sugar cane paddocks across dry-tropical and subtropical Queensland, Australia, to examine the potential for spot spraying to reduce herbicide losses in runoff. Recommended rates of the herbicides glyphosate, 2,4-D, fluoroxypyr, atrazine, and diuron were sprayed onto 0, 20, 40, 50, 70, or 100% of the area of runoff plots. Simulated rainfall was applied 2 days after spraying to induce runoff at one plant cane and three ratoon crop sites. Over 50% of all herbicides were transported in the dissolved phase of runoff, regardless of the herbicide's sediment-water partition coefficient. For most sites and herbicides, runoff herbicide concentrations decreased with decreasing spray coverage and with decreasing herbicide load in the soil and cane residues. Importantly, sites with higher infiltration prior to runoff and lower total runoff had lower runoff herbicide concentrations.
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