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首页> 外文期刊>Journal of environmental science and health >Effects of sprout cutting plus systemic herbicide application on the initial growth of giant reed
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Effects of sprout cutting plus systemic herbicide application on the initial growth of giant reed

机译：切芽加全身除草剂对大芦苇初始生长的影响

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Chlorophyll fluorescence analysis (CFA) has been successfully used to rapidly determine the responses of different plants to herbicides. It has not, however, been used to test the effect of these products on invasive riparian species. This paper reports the use of CFA to determine photosynthetic activity in Arundo donax, an invasive reed causing serious problems in Mediterranean riparian habitats, in response to systemic herbicide application following cutting. Growth was measured in terms of new sprout relative height and sprout and rhizome relative biomass. CFA showed glyphosate, from half the on-label dose of 5 L ai.ha~(-1) upwards, to have a significant effect (100% reduction) on photosynthetic activity at 21 days after treatment (DAT), while profoxydim, from half the on-label dose of 0.375 L ai.ha~(-1) upwards, caused a 70% reduction soon after application, although these plants later recovered. Azimsulfuron, cyhalofop-butyl and penoxsulam had no significant effect on photosynthetic activity at any dose. At 60 DAT, glyphosate (from half the on-label dose of 5 L ai.ha~(-1) upwards) was associated with a 90% reduction in sprout height, while, profoxydim (from half the on-label dose of 0.375 L ai.ha~(-1) upwards) caused a 50% reduction. No dose (0-2x the on-label dose) of azimsulfuron, penoxsulam or cyhalofop-butyl was associated with any significant growth reduction at 60 DAT. The results show that CFA can be used to successfully measure the response of these invasive plants to herbicides, and that glyphosate, and possibly profoxydim, might be used to control Arundo donax after initial cutting.
机译：叶绿素荧光分析（CFA）已成功用于快速确定不同植物对除草剂的反应。但是，尚未将其用于测试这些产品对侵入性河岸物种的影响。本文报道了使用CFA来测定Arundo donax中的光合作用活性，Arundo donax是一种入侵性芦苇，在地中海沿岸生境中引起严重问题，以应对切割后的全身性除草剂应用。根据新芽的相对高度以及芽和根茎的相对生物量来测量生长。 CFA显示，在处理后21天（DAT），草甘膦从5 L ai.ha〜（-1）的一半剂量向上对光合活性有显着影响（降低100％），而丙草胺则从标记后剂量的0.375 L a.ha〜（-1）的一半以上可在施用后立即减少70％，尽管这些植物后来恢复了生长。在任何剂量下，嘧磺隆，氰氟丁草酯和戊磺酰胺对光合活性均无显着影响。在60 DAT时，草甘膦（从5 L ai.ha〜（-1）的标签剂量的一半以上）与芽苗高度降低90％相关，而丙草定（从标签上的剂量0.375的一半）中减少Lai.ha〜（-1）向上导致减少了50％。在60 DAT时，阿齐磺隆，戊氧舒兰或氟氟丁酯的剂量（标签上剂量的0-2倍）与任何显着的生长减少无关。结果表明，CFA可用于成功测量这些入侵植物对除草剂的反应，初次切割后，草甘膦（可能还有丙草定）可用于控制Arundo donax。

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