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首页> 外文期刊>Journal of Agricultural and Food Chemistry >ABIOTIC AND BIOTIC DEGRADATION OF DITHIOPYR IN GOLF COURSE GREENS
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ABIOTIC AND BIOTIC DEGRADATION OF DITHIOPYR IN GOLF COURSE GREENS

机译：高尔夫球场果岭中二吡IO的生物降解和生物降解

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摘要

Results of previous research have indicated that only a small fraction of dithiopyr [S,S-dimethyl 2-(difluoromethyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3,5-pyridinedica rbothioate] is lost in the surface water or by infiltration in soil leachate following application to golf course greens. The purpose of this research was to investigate the abiotic and biotic agents for dithiopyr loss from golf course greens. Growth chamber and laboratory studies were conducted to determine dithiopyr loss in response to volatilization, photodegradation, chemical transformation, and biological degradation in sterile and nonsterile rooting media (RM) and RM leachate collected from established golf course greens maintained in the greenhouse. Following application to RM, dithiopyr was lost primarily by volatilization which increased with increasing treatment period and temperature. The estimated half-life for dithiopyr in RM ranged from 68.8 days (sterile RM, dark, 20 degrees C) to 39.2 days (nonsterile RM, dark, 35 degrees C). Dithiopyr degradationin RM leachate was greater under UV radiation than in the dark and was faster than in distilled water under the same conditions indicating the potential for the presence of photosensitizers prompting photodegradation of dithiopyr in the RM leachate. The estimated half-lives for dithiopyr in RM leachate ranged from 515 days (sterile RM leachate, dark, 6.8 pH, 20 degrees C) to 0.8 days (nonsterile RM leachate, UV light, 6.8 pH, 20 degrees C). Results indicate a large effect of environmental variables on dithiopyr loss and its persistence in the turfgrass ecosystem.
机译：先前的研究结果表明，仅损失了一小部分的二硫代吡啶[S，S-二甲基2-（二氟甲基）-4-（2-甲基丙基）-6-（三氟甲基）-3,5-吡啶基硫代硫酸盐]。地表水或通过渗入高尔夫球场果岭后渗入土壤渗滤液。这项研究的目的是调查高尔夫球场果岭中非生物和生物制剂对二硫吡py损失的影响。进行了生长室和实验室研究，以确定在无菌和非无菌生根培养基（RM）和RM渗滤液中的挥发，光降解，化学转化和生物降解反应中二硫吡py的损失，这些渗滤液是从已建立在温室中的高尔夫球场果岭中收集的。应用于RM后，二硫吡py主要通过挥发损失，挥发随着处理时间和温度的升高而增加。在RM中估计的二硫代吡咯半衰期为68.8天（无菌RM，黑暗，20摄氏度）到39.2天（非无菌RM，黑暗，35摄氏度）。在相同条件下，UV辐射下，RM渗滤液中的二硫代吡啶降解要比在黑暗中要大，并且比蒸馏水中的二硫吡咯降解要快，这表明在RM渗滤液中存在光敏剂可能会促使二硫代吡啶发生光降解。 RM浸出液中二硫代吡喃的估计半衰期为515天（无菌的RM浸出液，深色，6.8 pH，20摄氏度）至0.8天（非无菌的RM浸出液，UV光，6.8 pH，20摄氏度）。结果表明环境变量对二硫吡gra的损失及其在草皮草生态系统中的持久性影响很大。

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