- 期刊
殺草劑對大黍族群之影響
effects of Herbicides on the Population of Panicum maximum
摘要
雜草在坡地果園常被認定僅具有負面的影響，而忽略其在水土保持上之功能。近年來坡地果園之雜草防治多依賴殺草劑，對雜草之管理僅講究有效、經濟，安全性上僅考慮對人之安全，而忽視對自然生態平衡之影響。本研究以大度山坡地之優勢植物大黍為對象，探討殺草劑對大黍之防治效果及施用後對坡地覆蓋植物相之影響。於清水熬峰設置樣區，分別施用巴拉刈、嘉磷塞、氟氯比、甲基合氯氟等四種藥劑，施藥後17天及28天調查其覆蓋率，以比較四種藥劑對大黍之除治效果，結果以巴拉刈之藥效最快，嘉磷塞次之，防治率皆達100%；甲基合氯氟之藥效雖較慢顯現，但仍屬有效；其中以嘉磷塞之藥效最持久；氟氯比對大黍之防治則無效。藥劑處理後其再呈現之植相隨處理藥劑不同而有所差異，各處理樣區之優勢植物各有不同，嘉磷塞處理區以闊葉鴨舌廣舅佔優勢，巴拉刈處理區以大黍及闊葉鴨舌廣舅佔優勢，氟氯比處理區以大黍佔絕對優勢，甲基合氯氟處理以闊葉鴨舌廣舅及澤蘭佔優勢，對照組則以大黍及澤蘭較佔優勢。施用殺草劑後易造成單一植物相之情況，值得進一步探討。
並列摘要
Panicum maximum is a widespread naturalized plant in Taiwan. It is very dominant at slopelands of Datu Mt. It is good for erosion control but quit flammable in drought season. For studying the effects of herbicides on the population of Panicum maximum, paraquat, glyphosate, fluroxypyr and haloxyfop-methyl were tested at plots set up at Aufon. Based on the investigations at 17 days and at 28 days after application, paraquat and glyphosate get 100% control; haloxyfop-methyl was effective but slowly fluroxypyr was not effective. Flora varied following herbicide applications. Dominant species was Spermococe latifolia for glyphosate plots; Panicum maximum and Spernacoce latifolia for paraquat plots, Panicum maximum for fluroxypyr plots; Spermacoce latifolia and Eupatorium formosanum for haloxyfop-methyl plots; Panicum maximum and Eupatorium formosanum for check plots.
並列關鍵字
Cover vegetation ； slopeland ； herbicides ； pamicum maxlmum Jacq ； paraquat ； glyphosate ； fluroxypyr ； haloxyfop-methyl延伸閱讀
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