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곰솔 및 삼나무의 흉고형수 (胸高形數) 결정에 관한 연구
박남창,정영관 ( Nam Chang Park,Young Gwan Chung ) 한국산림과학회 1985 한국산림과학회지 Vol.70 No.1
In order to estimate breast-height form factors of Pinus thunbergii and Cryptomeria japonica, 8 models based on tree age, diameter at breast height and tree height were suggested and evaluated. It was the following equations that turned out to be most fit for estimating them; for Pinus thunbergii, F = 0.553 - 4.567 1/A + 71.409 1/A² (R² = 0.928), based on tree age, (6.727^(**)) (14.100^(**)) F = 0.356 + 1.774 1/D - 0.770 1/D² (R² = 0.944), based on diameter at breast height, (15.102^(**)) (2.908^(**)) F = 0.316 + 1.546 1/H + 0.397 1/H² (R² = 0.941), based on tree height, (8.380^(**)) (3.896^(**)) for Cryptomeria japonica, F = 0.400 + 2.348 1/A + 17.053 1/A² (R² = 0.889), based on tree age, (3.501^(**)) (3.298^(**)) F = 0.353 + 2.118 1/D - 1.462 1/D² (R² = 0.923), based on diameter at breast height, (14.873**) (3.545**) F = 0.403 + 0.427 1/H + 2.843 1/H² (R² = 0.887 ), based on tree height. (3.254^(**)) (5.742^(**)) The above estimated breast-height form factors proved to be overestimated for young trees and small diameter trees, and to be underestimated for old trees and large diameter trees, in comparison to generally accepted figure in Korea, that is, the form factor of 0.45.
중부지방 산림 토양특성에 의한 강송임분의 임지생산력 관계추정
박남창,이광수,정수영,박문섭,신현철,전권석,허무룡 인간식물환경학회 2009 인간식물환경학회지 Vol.12 No.4
We described the associated variation in site index of Pinus densiflora for. erecta in responses to site variables of soil properties. Additionally, this study was conducted to estimate site index in unstocked land by the physico-chemical properties derived from stocked forest soil and to investigate the effects of the physico-chemical properties by soil layers on site index of surveyed area, totally 77 sites in central Korea. At each site, there were surveyed 14 items of the physico-chemical properties, namely, content of sand, silt and clay, soil pH, organic matter, total nitrogen, available P2O5, cation exchange capacity, exchangeable K+, Na+, Ca++, Mg++, and base saturation. The multiple regression equations using stepwise regression method were applied to this study. In the degree of contribution of the variables to site index by soil horizons, the highly effective variables were Base Sat., Exch. Ca++, T.N., Exch. Mg++, and C.E.C. in A horizon and Base Sat., Exch. Mg++, C.E.C., Soil pH, and O.M. in B horizon of P. densiflora for. erecta stands. As a result, it was concluded that the regressive prediction induced by significant soil site factors by forest soil horizons had useful guidance for finding out the best suitable area especially in unstocked land and further more for establishing successful stands of this species.
산림토양의 이화학적 성질과 잣나무임분의 지위지수와의 관계
박남창,정수영,이광수,신현철,허무룡 인간식물환경학회 2008 인간식물환경학회지 Vol.11 No.4
This study was carried out in order to estimate site indices and to investigate productivity of Pinus koraiensis in unstocked land by the relationship between site index and physico-chemical properties of forest soil in stocked land. In Pinus koraiensis stand 83 nationwide sites were selected and site index model were estimated with 14 items of physico-chemical properties respectively obtained from A and B horizon of forest soil in each site. According to the relationship between soil properties and site index, it was found that the regressed models by soil properties fitted well in both site production prediction of soil A and B horizons. As a result of these two regressions, significant correlation was found between site index and Exch. Ca++, O.M., Clay, T.N., and Sand in A horizon, while Avail. P2O5, Base Sat., C.E.C., Exch. Mg++, and T.N. and site index have grater correlation in B horizon. In conclusion, these results will provide not only the important criteria for establishment of management forest plan in unstocked land, but also the useful guidance for selecting the suitable sites and trees. This study was carried out in order to estimate site indices and to investigate productivity of Pinus koraiensis in unstocked land by the relationship between site index and physico-chemical properties of forest soil in stocked land. In Pinus koraiensis stand 83 nationwide sites were selected and site index model were estimated with 14 items of physico-chemical properties respectively obtained from A and B horizon of forest soil in each site. According to the relationship between soil properties and site index, it was found that the regressed models by soil properties fitted well in both site production prediction of soil A and B horizons. As a result of these two regressions, significant correlation was found between site index and Exch. Ca++, O.M., Clay, T.N., and Sand in A horizon, while Avail. P2O5, Base Sat., C.E.C., Exch. Mg++, and T.N. and site index have grater correlation in B horizon. In conclusion, these results will provide not only the important criteria for establishment of management forest plan in unstocked land, but also the useful guidance for selecting the suitable sites and trees.