Application of herbicides to afforestation in barren hills suitable for forest

Key words: 
• barren hills suitable for afforestation /
• chemical weeding /
• afforestation /
• effects of weeding

Abstract: 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 Fuan City of Fujian Province . The results indicated that the single use of Hexazinone could eradicate the perennial noxious weeds mainly consisting of Miscanthus f loridulus , 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 f loridulus , 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 .[ Ch , 6 tab .8 ref .]