化学除草剂在宜林荒山造林中的应用

为探索化学除草剂在宜林荒山造林中的应用效果,在福建省福安市进行了多种高效林用除草剂单用、混用除草的随机试验和正交试验研究.结果表明:以森泰单用能把宜林荒山中多年生恶性杂草五节芒Miscanthus floridulus、苦竹Pleioblastus amarus、刚竹Phyllostachys viridis、芒萁Dicranopteris pedata等杂草灭除;以草甘膦为主剂,森草净、果尔为辅剂的混用能灭除五节芒、大芒Miscanthus sinensis等杂草,在有效剂量内除草率分别达到92%和96%以上.药剂除草造林比人工除草造林减少除草用工61.5%～87.7%,降低除草成本40.2%～70.9%.药剂除草与人工除草相比能减少水土流失和地表水分蒸发,为幼苗和幼树生长创造良好的生态环境.表6参8

Application of herbicides to afforestation in barren hills suitable for forest

In order to study the effects of applying herbicides to afforestation in barren hills, the random and orthogonal tests of applying a sort of single and mixed herbicides were carried out in Fu'an City of Fujian Province. The results indicated that the single use of Hexazinone could eradicate the perennial noxious weeds mainly consisting of Miscanthus floridulus, Pleioblastus amarus, Phyllostachys viridis and Dicranopteris pedata and etc.in barren hills suitable for forest and the mixed use of Glyphosate as principle agents, Sulfometuron methyl and Oxyfluorfen as adjuvants could eradicate Miscanthus floridulus, Miscanthus sinensis and etc. With the effective dose, the effects of weeding could reach over 92% and 96% respectively. Chemical weeding could reduce labor by 61.5% to 87.7%, decrease weeding cost by 40.2% to 70.9%. Compared with manual weeding, it could also reduce water and soil losses and surface water evaporation, which created a good ecological environment for afforestation and growth of young trees.