| 摘要: |
| 【目的】探索提高未成林造林地抚育质量、促进再造森林快速生长的有效途径。【方法】以江西省永新县七溪岭林场采伐迹地再造后的未成林造林地为研究对象，以传统的全刈抚育为对照，研究78.8%和88.8%草甘膦胺盐可溶性除草剂化学除草抚育后，未成林造林地植被物种组成的变化情况。【结果】传统的全刈抚育后，未成林造林地植被物种组成未发生明显变化，主要植被仍为五节芒和芒萁。化学除草抚育后，未成林造林地非经营目的植被种类和群落结构发生了变化，多数杂草和灌木的权重发生了根本改变，高大、严重危害目的树种生长的植被（如五节芒、芒、箬竹等）被矮小、对目的树种生长影响较小的植被（如野茼蒿、藿香、苦菜、鼠曲草、委陵菜等）取代，林地生产力得到恢复。【结论】化学除草抚育可改变非经营目的植被群落结构，改善未成林造林地土壤肥力状况，提高林地生产潜力，实现未成林抚育效益的最大化。 |
| 关键词: 化学除草 未成林造林地 植被 物种组成 |
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| 基金项目:科技部国家自然资源平台项目（2005DKA21003） |
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| Effects of chemical weed control on the species composition of vegetation of the immature forest land |
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| Abstract: |
| 【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. |
| Key words: chemical weeding immature forest land vegetation species composition |
