【摘要】 对辽东丘陵区腰堡乡林下的棕壤进行了调查研究,结果表明:造林后二十年左右地面就能恢复2～6cm厚完整的枯枝落叶层,控制了地表迳流的形成。土壤性状变化与邻近草被下的棕壤相比,土壤有机质和速效养分量有不同程度的增长,有的有机质量增长0.8倍,土壤孔性也得到改善。但是,土体浅薄、针叶林下土壤酸化(最低pH5.6)及紧实的粘淀层(最高紧实度达50kg/cm~3)是林木生长的土壤限制因素。要因土选择适宜树种发展针阔混交林,在土体的浅位著有极紧实的粘淀层,造林时应加以破碎。更多还原

【Abstract】 To reveal the relationship between the growing status of trees in different artificial forest stands and the characteristics of Brown earth, and to lay down a measure for afforestation in line with soil condition, the Brown earth under forest over hills in the east of Yaopu was studi- ed. The results obtained showed that the continuous litter layer with the depth of 2-6 cm, which can control the development of soil erosion, could be restored in about 20 years after afforestation. Comparing with the Brown earth under the vegetation of grass nearby, the soil proper- ties of Brown earth under forest changed greatly. The content of soil organic mattet and rapidly available nutrient increased respectively. Soil porosity was also improved gradually. But shallow soil body, acidation of soil under coniferous leaf forest (pH 5.6) and tight argillic horizon (compactation 50 kg/cm~3) are limiting factors of soil for tree growth. Therefore, the suitable varieties of tree should be selected according to the soil types. If the tight argillic horizon existed in the upper position of soil body. it must be broken to suit the development of root system in afforestation. The coniferous and broadleaf tree mixed forest should be developed in the region to prevent the soil from acidation.更多还原