Abstract: In order to understand the capability that red soil change the environment in the soil,the main red soil factors and nutrition factors of camphor-tree seedlings were investigated after applying different calcium carbonate concentrations into Fe fertilizer in red soil.Results indicated that the application of different calcium carbonate concentrations increased soil pH value,hydrolysable N,available P,readily available K,available Ca and available Mg contents;but other soil factor contents reduced.Rule of soil factor contents were evident in different calcium carbonate concentrations.Available Fe,available Mn,available Cu and available Zn contents;available P,available Ca and available Mg contents;readily available K and hydrolysable N contents were the same.pH value,available P,readily available K,available Ca and available Mg contents were antagonistic to available Fe content,while organic matter,hydrolysable N,available Mn,available Cu and available Zn contents were synergistic to available Fe content.Meanwhile,with the increase of calcium carbonate concentration,total Fe,total Mn and total Zn contents of shoot and root of camphor-tree seedlings were reduced;fresh and dry weight of shoot,root and plant,and root shoot ratio of fresh and dry condition were enhanced first and then declined;water contents of shoot,root and plant were reduced first and then raised.Red soil is good acidic media materials,and can change the soil environment locally,buffer low carbonate calcium concentrations and promote the growth of the root.It is conducive for the root to absorb nutrient factors,so it can guarantee the normal growth of camphor-tree seedlings.With the increasement of calcium carbonate concentration,it will inhibit the activity of the root and affect the growth of camphor-tree seedlings.

Key words: Camphor-tree, Red soil, Calcium carbonate

CLC Number: 

• S143

• S792.23