Effects of chemical weed control on the species composition of vegetation of the immature forest land.

[Objective] The experiment was conducted to explore tending to improve the quality of immature forest land,and promote the effective ways of the roqid growth of reforestation.[Method] With Yongxin County,Jiangxi seven River Ridge Farm recycling cutover forest land after the immature as the research object,a mow tending as the control,78.8% and 88.8% herbicide glyphosate ammonium salt soluble chemical weeding tending change of species composition of forest vegetation were studied.[Result] I Traditional upbringing did not change significantly the immature forest land vegetation species composition,the main vegetation being Miscanthus and Dicranopteris.After Chemical weeding tending,the immature plantation land vegetation types and non-business purposes underwent a change in community structure,most of the weight of weeds and shrubs experienced a fundamental change,the tall vegetation,seriously harmful to the growth of tree species(such as Miscanthus,Miscanthus sinensis,Indocalamus,etc.),were replaced by small,less-impact vegetations(such as Crepidioides,Agastache rugosa,Bitter herbs,Grass rat song,Potentilla dishes),thus forest productivity was restored.[Conclusion] Chemical weed control can change the structure of vegetation communities in non-business purposes,improve the fertility of immature forest land,improve forest production potential,and achieve maximum efficiency of unpaired tending.