论文部分内容阅读
江华群众历史上就有用杉木插条造林的习惯,但近些年有人给插条杉木定了一个生长慢、产量低、材质差、易衰老的结论,而大力推广杉木实生苗造林。但当地群众不愿育苗,即使育苗也不愿造,广大林业干部对此也持有不同看法,为此,我们特赴江华林区进行调查。先后调查了4个公社,12个大队,24个生产队,对杉木插条与实生苗对比试验林进行标准地每木调查,并作了树干解析。现将调查结果概述如下: 一、插条杉木的生长与产量在同一立地条件、同一营林措施下营造的插条与实生对比杉木试验林中,选择有代表性的24年生成林和13年生中林。试验林的立地条件都是20—30°小山、东北坡,土壤肥力中等,营林措施同样是二耕土造林,连续间种玉米2年,修山抚育1年。所不同者,得贵实生苗是一般种苗,黄石实生苗是良种壮苗。生长情况见表1。
Jianghua people have historically had the habit of afforestation with Chinese fir cuttings, but in recent years, some people have given fir cuttings a slow growth, low yield, poor quality and easy aging, while vigorously promote fir seedling afforestation. However, the local people are reluctant to nurture seedlings, and even the nursery seedlings are not willing to make them. The majority of forestry cadres also hold different opinions on this issue. Therefore, we specially went to investigate the forest area of Jianghua. Four communes, 12 brigades and 24 production teams were successively surveyed to conduct a standard survey on fir-cuttings and seedling comparison test forests and to make tree trunk analysis. The survey results are summarized as follows: First, the growth and yield of cuttings fir In the same site conditions, the same management measures to create cuttings and contrast fir experimental forest, select a representative 24-year-old forest and 13-year-old Zhong Lin. Site conditions of the experimental forest are 20-30 ° hill, northeast slope, soil fertility medium, silviculture measures are also two afforestation afforestation, intercropping corn for 2 years, repair the mountain for 1 year. The difference is that you are expensive seedlings are generally seedlings, yellowstone seedlings are seedlings seedlings. See table 1 for growth.