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국내연구정보 (Domestic information) |
| ▒ Home | > | | 연구정보 (Information) | > | 국내연구정보 (Domestic information) |
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| Morphological, Physical and Chemical Properties of Forest Soils |
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| 글쓴이 : 관리자
날짜 : 08-09-29 11:47
조회 : 13782
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Analysis on the Relation between the Morphological, Physical and Chemical Properties of Forest Soils and the Growth of the Pinus koraiensis Sieb, et Zucc. and Larix leptolepis Gord by quantification <Jour. Kor. For. Soc 53:1-26 1981> Author In-Koo Chung
1) Aiming at supply of basic informations on tree species siting and forest fertilization by understanding of soil properties that are demanded by each tree species through studies of forest soil's morphological, physical and chemical properties in relation to tree growth in Korea, the necessary data have been collected if the last 10 years, are quantified according to quantification theory and are analyzed in accordance with multi-variate analysis.
2) Test species, Japanese larch and Korean white pine are plantable in extensive areas from mid to north in temperate forest zone and are the two most recommended reforestation tree species in Korea. However, their respective site demands are little known and they have been confusion or considered demanding the same site during reforestation. When Korean white pine is planted in larch sites, it has shown relatively good growth, but, when Japanese larch is planted in Korean white pine site it can be hardly said that the Japanese larch growth is good. To understand on such a difference soil factors have been studied so as to how the soil's morphological, physical and chemical factors affect tree growth helped with the electronic computer.
3) All the stands examined are man-made mature forests. From 294 Japanese larch plots and 259 Korean white pine plots dominant trees are cut as samples and through stem analysis site index is determined. For each site index soil profiles are made in the related forest-land for analysis. Soil samples are taken from each profile horizon and forest-land productivity classification tables are worked out through physical and chemical analyses of the soil samples for each tree species for the study of relationships between physical, chemical and the combined physical/chemical properties of soil and tree growth.
4) In the studγ of relationships between physical properties of soil and tree growth it is found out that Japanese larch growth is influenced by the following factors in the decreasing order of weight deposit form, soil depth, soil moisture, altitude, relief, soil type, depth of A-horizon, soil consistency, content of organic matter, soil texture, bed rock, gravel content, aspect and slope.
5) In the study of relationships between chemical properties of soil and tree growth it is found out that Japanese larch growth is influenced by the following factors in the order of base saturation, organic matter, CaO, C/N ratio, effective P2O5, pH, exchangeable K2O, T-N, MgO, CEC, Total Base and Na. For the Korean white pine the influencing factors' order is effective P2O5, Total Base, T-N, Na, C/N ratio, pH, CaO, base saturation, organic matter, exchangeable K2O, CEC and MgO.
6) In the study of relationships between the combined physical and chemical properties of soil and tree growth it is found out that Japanese larch growth is influenced by the following factors in the order of soil depth, deposit form, soil moisture, pH, relief, soil type altitude, T-N, soil consistency, effective P2O5, soil texture, depth of A-horizon, Total Base, exchangeable K2O and base saturation. For the Korean white pine the influencing factors' order is soil type, soil consistency, aspect, effective P2O5, depth of A-horizon, exchangeable K,0, soil moisture, Total Base, altitude, soil depth, base saturation, relief, T-N, C/N ratio and deposit form.
7) In the multiple correlation of forest soil's physical properties larch's correlation coefficient for Japanese larch is 0.9272 and for Korean white pine, 0.8996. With chemical properties larch has 0.7474 and Korean white pine has 0.7365. So, the soil's physical properties are found out more closely related with tree growth than chemical properties. However, this seems due to inadequate expression of soil's chemical factors and it is proved that the chemical properties are not less important than the physical properties. In the multiple correlation of the combined physical and chemical properties consisting of important morphological and physical factors as well as chemical factors of forest soils larch's multiple correlation coefficient is found out to be 0.9434 and for Korean white pine it is 0.9103 leading to the highest correlation.
8) As shown in the partial correlation coefficients Japanese larch needs deeper soil depth than Korean white pine and in the deposit form of colluvial and creeping soils are demanded by the larch. 'Moderately moist' to 'not moist' should be soil moisture and pH should be from 5.5 to 6.1 for the larch. Demands of T-N, soil texture and soil nutrients are higher for thr larch than the Korean white pine. Thus, soil depth, deposit form, relief, soil moisture, pH, altitude and soil texture are good indicators for species siting with larch and the Korean white pine while soil type and soil consistency are indicative only limitedly of species siting due to their wide variations as plantation environments. For the larch siting soil depth, deposit form, relief, soil moisture, pH, soil type, N and soil texture are indicators of good growth ard for the Korean white pine they are soil type, sol consistency, effective P2O5, and exchangeable K2O. In soil nutrients larch has been found out demanding more than the Korean white pine except K2O, which is demanded more by the Korean white pine than Japanese larch generally.
9) Physical properties of soil has been known as affecting tree growth to the greatest extent so far. However, as a result of this study it is proved through computer analysis that chemical properties of soil are not less important factors for tree growth than chemical properties and site demands for the Japanese larch and the Korean white pine that have been uncertain so far could be clarified.
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