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首页> 外文期刊>Weed technology >Broadleaf Herbicide Effects on Tall Fescue (Festuca arundinacea) Seedhead Density, Forage Yield, and Quality
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Broadleaf Herbicide Effects on Tall Fescue (Festuca arundinacea) Seedhead Density, Forage Yield, and Quality

机译：阔叶除草剂对高羊茅（Festuca arundinacea）种子头密度，牧草产量和品质的影响

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Four broadleaf herbicides and combinations were compared for two years with mefluidide, a growth regulator, for effects on 'Ky 31' and 'Fawn' tall fescue. Seedhead densities averaged 33% of the check with 8.4 g ai/ha of metsulfuron, 17% with 70 g ai/ha of imazethapyr, and 9% with 280 g ai/ha of mefluidide, while forage yields were reduced to about 40% of the check. Forage crude protein (CP) concentrations were increased by mefluidide, imazethapyr, and 8.4 g/ha of metsulfuron. Neutral-detergent fiber (NDF) of Ky 31 but not Fawn forage was reduced by mefluidide, imazethapyr, and metsulfuron at 6.3 and 8.4 g/ha, but Fawn NDF was increased by dicamba plus 2,4-D. In vitro dry matter digestibility was increased by metsulfuron at 6.3 and 8.4 g/ha, mefluidide, and imazethapyr in one of two years. Adding 2,4-D to metsulfuron reduced some effects of metsulfuron. Total CP/ha was no more adversely affected by imazethapyr and metsulfuron than mefluidide. Imazethapyr and metsulfuron can thus be used to control weeds without reducing fescue forage value.
机译：将四种阔叶除草剂及其组合与生长调节剂美氟肽进行了两年的比较，以研究对“ Ky 31”和“ Fawn”高羊茅的影响。甲磺胺8.4 g ai / ha的甲磺草胺的平均种子头密度为33％，咪唑乙烟酸70 g ai / ha的甲草胺为17％，甲氟哌啶为280 g ai / ha的甲草胺密度为9％支票。甲氟哌啶，咪唑乙烟和甲磺隆的用量为8.4 g / ha时，牧草粗蛋白（CP）浓度增加。 Ky 31的中性清洁剂纤维（NDF）降低了Fawn牧草的饲用量，但甲草胺，咪唑乙烟和甲磺隆分别以6.3和8.4 g / ha的量减少了，但麦草畏加2,4-D使Fawn的NDF增加了。甲磺隆在6.3和8.4 g / ha，甲氟哌啶和咪唑乙烟碱的两年中提高了体外干物质的消化率。在甲磺隆中添加2,4-D可以减轻甲磺隆的某些影响。总咪唑/公顷受咪唑乙烟草和甲磺隆的影响没有比甲氟哌啶多。依马西吡和甲磺隆可用于控制杂草，而不会降低羊茅的饲料价值。

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