沱江上游深丘地区不同立地土壤抗蚀性、渗透性及其影响因素

通过对沱江上游深丘地区不同立地土壤抗蚀性、渗透性与其各影响因素进行了研究,分析了土壤物理性状各因素及草本盖度、林分类型、郁闭度单独及综合对土壤抗蚀性、渗透性产生的影响,找出了不同立地条件下影响土壤抗蚀性、渗透性的主导因素,并结合当地情况初步探讨了成因,以期为土壤改良措施的选择提供依据。研究发现:1)该地区人为干扰严重,整体上土壤砂性较重,土壤物理结构较差,不利于保水保肥;2)该区影响土壤抗蚀性和渗透性的主导因素为林分类型和林下植被盖度,其中混交林提高土壤抗蚀性和渗透性,改良土壤的效果最好。

Edaphic anticorrosion and permeability and their influencing factors under different sites at highland upriver Tuo river

The research was made about the correlativity of edaphic anticorrosion and permeability and their influencing factors under different sites at highland uprive Tuo River. The main influencing factors of edaphic anticorrosion and permeability were found in different sites by analysing separate and integrated influence of edaphic physical characters and grass coverage and forest kinds and shade density on edaphic anticorrosion and permeability, the cause was also discussed to provide the gist for the selecting measures on meliorating soil. The result was got that:1) In the whole, man made interference was servere in this region, grittiness and too bad configuration of soil were disadvantageous to conserver water and fertilizer; 2) The main factors were forest kinds and coverage of vegetation under forests that were influencing edaphic anticorrosion and permeability, of which mixed forest have the best effectiveness enhancing edaphic anticorrosion and permeability and refining edaphic character.