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首页> 外文期刊>Nature environment and pollution technology >Temporal and Spatial Variation Characteristics of Air Pollution and Prevention and Control Measures: Evidence from Anhui Province, China
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Temporal and Spatial Variation Characteristics of Air Pollution and Prevention and Control Measures: Evidence from Anhui Province, China

机译：空气污染的时空变化特征及防治措施：来自安徽省的证据

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Dissipation of metribuzin and its persistence in tomato fruits was studied by conducting on-farmresearch trials in three farmer’s fields in Ranga Reddy district of Telangana state. Farmer’s fields withwidely varying soil characteristics were selected and metribuzin was applied at 500 g a.i. ha-1. Soilsamples were collected at 0, 7, 15, 30, 45 and 60 DAA (days after application) and fruit samples werecollected at harvest and analysed on GC-ECD for metribuzin residues. Metribuzin persisted in the soilsup to 45 DAA in coarse textured soils and 60 DAA in medium and fine textured soils. Metribuzin leachedto 20-30 cm depth in all the soils and leaching was more pronounced in coarse textured soils than infine textured soils. Organic carbon and clay content significantly influenced the residual life andleaching of metribuzin in soil. In soils, metribuzin dissipation followed a first-order decay process andexponential model was found to give better fit for field dissipation. Half life of metribuzin soil variedfrom 9.11 to 21.15 days. Metribuzin residues in tomato samples collected at the time of harvest werebelow the detection limit and MRL of 0.05 mg kg-1 in all the farmer’s fields.
机译：通过在Telangana州Ranga Reddy地区的三个农民田间进行农场研究试验，研究了metribuzin的耗散及其在番茄果实中的持久性。选择了土壤特性差异很大的农民田地，并以500 g a.i.的剂量施用了Metribuzin。 ha-1。在0、7、15、30、45和60 DAA（施药后数天）收集土壤样品，收获时收集水果样品，并在GC-ECD上分析metribuzin残留量。 Metribuzin在粗纹理土壤中持续存在达45 DAA，在中，细纹理土壤中持续保持60 DAA。 Metribuzin在所有土壤中的浸出深度都为20-30 cm，与粗纹理土壤相比，粗纹理土壤中的淋溶更为明显。有机碳和黏土含量显着影响土壤中美沙津的残留寿命和浸出。在土壤中，Metribuzin耗散遵循一阶衰减过程，并且发现指数模型更适合田间耗散。 Metribuzin土壤的半衰期从9.11天到21.15天不等。收获时收集的番茄样品中的甲香精残留量低于所有农民田间的检出限和最大残留限量0.05 mg kg-1。

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