湿地松种源试验初报

Preliminary Report on Provenance Test for Exotic Pinus elliottii

摘要:

通过对福建南屿湿地松种源苗期和14 a生的林分试验结果进行分析,结果表明:湿地松种源种子千粒重、发芽率、成活率差异大,种源间苗高差异显著,地径差异不显著.14 a生湿地松各种源间树高、胸径和材积种源间有一定差异.湿地松种源1 a生苗高与年降雨量呈显著的负相关,14 a生树高与纬度呈显著的负相关,与年降雨量和无霜期呈较大的正相关,说明低纬度区引种湿地松,年降雨量大和无霜期长可显著促进其树高生长.14 a生湿地松各种源生长量均超过火炬松和当地马尾松.

Abstract:

Results of the provenance test on 14-year-old stand showed that there was significant variation among different seed sources in height of yearling and no any significant difference in basal diameter of year. ling for exotic Pinus elliottii in Fujian of China. There were significant differences in trees height. DBH and trees volume among different provenances for the test stand of 14-year-old Pinus elliottii. The height of yearling for Pinus elliottii was negatively significant related to the annual rainfall of these provenances. The trees height of provenances for 14-year-old Pinus elliottii was significant negatively related to their altitudes, and positively to annual rainfall and forstfree days. These reflected that more days of forstfree and larger annual rainfall in lower altitude districts are helpful to grow fast in its tree height. The increment in trees height, DBH and trees volume of all provenances for 14-old-year Pinus elliottii in this test was larger than local Pinus massoniana and Pinus taeda.