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通过调查立地及各项生长指标,分析银杏用材林林木生长与立地条件、造林方式以及经营密度之间的关系。结果表明,高海拔与低海拔的银杏用材林生长差异显著,高海拔银杏用材林生长缓慢;嫁接苗与实生苗的高生长差异显著,嫁接苗木的径向生长较快,高生长受到抑制;在不同的年龄段,用材林适宜经营密度不同,随着年龄的增长,对生长空间的需求也增大,要适当加大用材林的经营密度。8-10年生银杏用材林以1.5 m×2.0 m、2.0 m×2.0 m 2种造林密度为宜。12-45年生银杏用材林以3.0 m×3.0 m和4.0 m×4.0 m 2种造林密度较适宜。
Through the investigation of site and growth index, the relationship between the growth of Ginkgo biloba forest and the site conditions, afforestation methods and management density was analyzed. The results showed that there was significant difference in the growth of Ginkgo biloba forest between high altitude and low altitude. The growth of Ginkgo biloba forest was slow at high altitude. The difference of height growth between grafted seedlings and seedlings was significant. The radial growth of grafted seedlings was rapid and the growth was inhibited. Age, timber suitable for different operating density, with age, the growing demand for space also increased, timber management should be appropriate to increase the operating density. The planting density of 8 - 10 year old Ginkgo biloba forest was 1.5 m × 2.0 m and 2.0 m × 2.0 m. The plantation density of 12 - 45 year - old Ginkgo biloba forest with 3.0 m × 3.0 m and 4.0 m × 4.0 m was more suitable.