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首页> 外文期刊>Acta Agriculturae Scandinavica. Section B, Soil and Plant Science >Evaluation of four different crops' sensitivity to sulfosulfuron and tribenuron methyl soil residues
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Evaluation of four different crops' sensitivity to sulfosulfuron and tribenuron methyl soil residues

机译：评价四种作物对磺胺磺隆和苯磺隆甲基土壤残留物的敏感性

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摘要

On the basis of greenhouse bioassays, the sensitivities of root and shoot biomass of barley (Hordeum vulgare L.), corn (Zea mays L.), oilseed rape (Brassica napus L.) and sugar beet (Beta vulgaris L.) to soil-incorporated sulfosulfuron and tribenuron methyl were assessed. Shoot and root biomass production was measured 30 days after emergence. Plant responses, including roots and shoots dry weight per pot, were described by a three parameter log-logistic regression model as a function of sulfosulfuron or tribenuron methyl doses and the relative sensitivities were calculated at the various ED-levels with their associated 95% confidence intervals. The most precise ED-levels were that at ED50 and sensitivity rank was oilseed rape, sugar beet, corn and barley, whatever the chosen response level and herbicide. We calculated relative sensitivities at ED10, ED50 and ED90 for the species of barley, the most tolerant crop, as reference. Comparison of relative sensitivity of crops to both herbicides showed that the sensitivity of these crops was much larger for tribenuron methyl than for sulfosulfuron. Oilseed rape was the most sensitive species (ED50 = 0.202 and 0.179 mu g kg(-1) soil for root dry weight (RDW) response to sulfosulfuron and tribenuron methyl, respectively) while barley was the most tolerant one (ED50 = 1.008 and 3.68 mu g kg(-1) soil for RDW response to sulfosulfuron and tribenuron methyl, respectively). Sugar beet and corn had intermediate sensitivity. Also, we demonstrated how important it is to show the confidence intervals of relative sensitivities. In several instances the relative sensitivities, even numerically large, were not significantly different from 1.00. We demonstrate that classifying biotypes as resistant to a herbicide requires the threshold of resistance/susceptible (R/S) of 4.00 only be accepted if confidence intervals do not cover 1.00.
机译：根据温室生物测定，大麦（Hordeum vulgare L.），玉米（Zea mays L.），油菜（Brassica napus L.）和甜菜（Beta vulgaris L.）的根和茎生物量对土壤的敏感性。评估了掺入的磺胺磺隆和苯磺隆甲基。出苗后30天测量茎和根生物量的产生。通过三参数对数逻辑回归模型将植物响应（包括每盆的根和茎干重）描述为磺胺磺隆或苯磺隆甲基剂量的函数，并在各种ED水平下以95％的置信度计算了相对敏感性。间隔。最精确的ED水平是在ED50和敏感性等级上是油菜，甜菜，玉米和大麦，无论选择哪种响应水平和除草剂。作为参考，我们计算了对最大耐受性作物大麦种类在ED10，ED50和ED90的相对敏感性。比较农作物对两种除草剂的相对敏感性，发现这些农作物对苯磺隆的敏感性比对磺磺隆的敏感性高得多。油菜是最敏感的油菜（ED50 = 0.202和0.179μg kg（-1）土壤，分别对磺胺磺隆和丁苯磺隆甲基根的干重（RDW）有反应），而大麦则是最耐受的品种（ED50 = 1.008和3.68微克kg（-1）的土壤对RDW对磺胺磺隆和丁苯磺隆的响应。甜菜和玉米具有中等敏感性。此外，我们证明了显示相对灵敏度的置信区间有多么重要。在某些情况下，相对灵敏度（即使在数值上较大）与1.00也没有显着差异。我们证明，将生物型分类为对除草剂具有抗性时，只有在置信区间不覆盖1.00时，才能接受4.00的抗性/敏感性阈值（R / S）。

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