Abstract:

Based on the investigation of 33 plots in Anhui Province,the effect of soil-forming rock on macro-element and micro-element contents in the bark of wingceltis,the effect of soil pH values on the mineral element contents in the bark of wingceltis and the relationship between the mineral element contents in aboveground biomass components were studied.The results indicated that the highest N and P contents in the bark of wingceltis were achieved in the stand growing on the soil from sandstone,and the highest K content in the bark occurred in the stand growing on the soil from limestone.However,the N,P and K contents in the bark for different sprout age were in the order of age 1>age 2>age 3.Compared with other soil-forming rock,the Ca and Mg contents in the bark which grew on the soil from limestone were the highest,especially the Ca content reaching 17.3g·kg^-1,which was 1.48 and 1.68 times of the soils from phyllite and slate respectively.With the increasing of sprout age,the Ca content in the bark increased,and the Ca content in the bark with 3-year-old sprout was 2 times of 1-year-old sprout.The highest Cu and Zn contents in the bark were also achieved in the stand growing on the soil from limestone,but the highest Mo and B contents in the bark took place in the stand growing on the soil from slate and the Mn content in the bark was the greatest in the stand growing on the soil from phyllite.Soil pH values have a remarkable impact on the mineral element contents in the bark of wingceltis.The Ca,Mg,B and Cu contents in the bark were in the order of alkaline soil(pH7.5～8.5)>neutral soil(pH6.5～7.5)>acid soil(pH5.5～6.5),Mo and Zn contents in the bark were neutral soil>alkaline soil>acid soil,and Mn content in the bark was acid soil>neutral soil>alkaline soil.The relationships between the mineral element contents in aboveground biomass components were complicated,however the Ca and Mg contents in the bark were highly correlated with the contents in the xylem.

Key words: Wingceltis, Soil-forming rock, Soil pH value, Mineral element content