Estimation of Site Productivity of Pinus densiflora by the Soil Physico-chemical Properties
2009
Park, N.C., Korea Forest Research Institute, Jinju, Republic of Korea | Lee, K.S., Korea Forest Research Institute, Jinju, Republic of Korea | Jung, S.Y., Gyeongsang National University, Jinju, Republic of Korea
We estimated site productivity for unstocked land based on the relationship between site index (i.e., average height of dominant trees at fixed age) and soil physico-chemical properties of Pinus densiflora stands. Site index relates to a direct method of determining a tree's response to a specific environment such as forest soil and climate conditions. We selected 78 sites in 22 P. densiflora stands of central temperate forest zone, and sampled soils for physicochemical analyzing. And 13 properties of soils were statistically treated by stepwise regression. In the degree of contribution of the variables to site index, the highly effective variables in A horizon were OM, clay content, sand content, available P₂O∧5, and Exch. Ca++ in order, and in B horizon T.N., O.M., Soil pH, cation exchange capacity(C.E.C.), and sand content in order. In both A and B horizon of the soil for P. densiflora stands, the variables commonly contributed to the site index were sand content and OM. These results may be useful to provide not only important criteria for establishment of Pinus densiflora stands especially in unstocked land but also a guidance for reforestation.
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