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1.杉木是我国主要速生用材树种之一,现已发现很多快速丰产林分,林农也有丰富的培育经验。在学习和总结这些经验中,我们试用了林型学原理与方法。、 2.在调查地区,根据地貌、土壤和栽培措施(主要是抚育强度和密度)的不同,把杉木人工林划分为3个林型组、6个亚组、8个林型和13个栽培型。 3.比较林型组、亚组、林型和栽培型的林木生长发育状况,可以看出,快速丰产的原因是综合的,是森林植物条件、树种的生物学特性和人为措施适当结合的结果。 4.对于今后的造林,我们建议,除了选择良种壮苗,实行烧山全垦以外,应根据不同的林型,设计合理的密度和加强抚育。并根据已有调查材料,正确估计森林将来的生长发育状况。
1. Cunninghamia lanceolata is one of the main species of fast-growing timber in China. Now it has found many fast-growing and high-yielding stands, and forest farmers also have rich experience in nurturing. In learning and summarizing these experiences, we tried the principle and method of forest type. 2. In the survey area, the Chinese fir plantations were divided into three forest types, six sub-groups, eight forest types and thirteen cultivation types according to the difference of topography, soil and cultivation measures (mainly tending strength and density) type. Comparing forest growth and development status of forest type, subgroup, forest type and cultivated type, it can be seen that the reason for rapid yield is comprehensive, as a result of appropriate combination of forest plant conditions, biological characteristics of tree species and man-made measures . 4. For the future afforestation, we suggest that, in addition to selecting strong seedlings and implementing full-burned mountain cultivation, we should design reasonable density and strengthen tending according to different forest types. And according to the existing survey materials, correctly estimate the future growth and development of the forest.