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1958年,我们在陕西省秦岭南坡的宁陕、柞水、佛坪等地区对油松林分进行了更新问题的观察,此外并结合1957年在该区的沔县、略阳等地所搜集到的资料进行了分析研究,整理出这篇材料,兹提出来供参考!限于笔者水平,谬误之处希不吝指正。一、油松林分概述油松喜生于由花岗岩或片麻岩风化后所生成的中性土或微酸性的砂质壤土上,不耐硷,在重盐硷地上不能生长,在排水不良的凹地上生长不良。调查地区油松林下土壤主要有二种:一为山地在坡积原积花岗岩风化后的角砾石粒砂质土母质上发育的原始粗骨棕
In 1958, we observed the problem of Pinus tabulaeformis forest regeneration in Ningxia, Zhashui, Foping and other areas on the southern slope of Qinling in Shaanxi Province. In addition, in 1957, we gathered in Lixian, Lueyang and other places in the area The data to the analysis, sorting out this material, it is presented for reference! Limited to the author level, fallacious place Xi not hesitate to correct me. First, overview Pinus tabulaeformis born in the granite or gneiss weathering generated by the neutral soil or slightly acidic sandy loam, not alkaline, can not grow on the heavy salt alkaline, poor drainage in the Bad growth on the ground. There are mainly two kinds of soils under the Pinus tabulaeformis forest in the survey area: one is the original coarse-grained brown bone which is developed on the parent material of hornblende gravel soil weathered in the Piedmont pristine granite