Characterizing downwind drift deposition of aerially applied glyphosate using RbCl as tracer  

作　　者：Yanbo Huang Claudiane M.Ouellet-Plamondon Steven J.Thomson Krishna N.Reddy 

机构地区：[1]United States Department of Agriculture,Agricultural Research Service,Crop Production Systems Research Unit,141 Experiment Station Road,Stoneville,MS 38776,USA [2]Department of Construction Engineering,Superior Technology School,1100 Notre-Dame Street West,Montreal,Quebec H3C 1K3,Canada [3]United States Department of Agriculture,National Institute of Food and Agricultural,Division of Agricultural Systems,Waterfront Center,80009th Street,SW,Washington,DC 20024,USA

出　　处：《International Journal of Agricultural and Biological Engineering》2017年第3期31-36,共6页国际农业与生物工程学报（英文）

摘　　要：Rubidium chloride(RbCl)was used as a tracer tank-mixed with active ingredients to profile downwind deposition of aerially applied crop protection and production materials to characterize off-target drift,which helps improve spray efficiency and reduce environmental contamination.Mylar sheets were placed on a holder in the field at each sampling station to collect sprayed solution.RbCl tracer was used to assess downwind drift of nozzles mounted on the booms installed and controlled on both sides of an agricultural airplane.The experiment was conducted on a field covered by Bermuda grass(Cynodon dactylon).During the experiment,the airplane was planned to fly three passes with three replications at each of three different altitudes,3.7 m,4.9 m,and 6.1 m for total of 27 flight runs.The results indicated that sampling station location had a significant effect on RbCl concentration.However,application release altitude was not significant to the change of RbCl.Another practical application in the same aerial application system was used to assess crop injury from the off-target drift of aerially applied glyphosate.RbCl concentrations measured from Mylar sheets were correlated with visual injury,plant height,shoot dry weight,leaf chlorophyll content,and shikimate,which were measured from the leaves and plant samples collected.Overall,RbCl is an effective tracer for monitoring spray applications from agricultural aircraft and unmanned aerial vehicles to intensify agriculture output and minimize environmental impact.

关 键 词：Rubidium chloride(RbCl) precision agriculture spray efficiency off-target drift aerial application HERBICIDE crop injury environmental pollution 

分 类 号：TG1[金属学及工艺—金属学]