湿地松种源试验研究

RESEARCH ON SLASH PINE PROVENANCE TEST

本文总结了我国3个气候带7个试验点湿地松种源8年的试验结果,对不同种源的树高、胸径、材积生长及树种对比进行显著性检验。湿地松种源生长与原产地气象因子无显著相关;种源×地点交互作用不显著;种源间病虫害无显著差异;在较北的河南鸡公山林场,产自南部的S-7及S-3受冻害较重,而对照种火炬松L-3未受冻害。2年生湿地松高、径生长与8年生树高、胸径生长呈显著相关,这为早期选择提供了依据。根据生长快与适应性强的特性,选出适合我国不同气候带的湿地松优良种源及适宜发展的树种,达到“适地、适树、适种源”。

Seeds of Slash Pine were obtained from natural range of the species in the USA (6 states). Provenance tests were carried out in 7 locations (latitude range from 21.9~31.8°N) in China in 1981. There was some variation among different seed sources of Slash Pine in 8-year height, diameter and volume growth. The correlation of growth with climatic factors of seed sources was not significant. There was also no significant seed source x location interaction. Superior seed sources of Slash Pine were from Florida, South Carolina and Georgia states.Species comparisons of land races of Slash,Loblolly and local Masson Pine were also included in the tests. In southern subtropical regions, Masson Pine and Loblolly Pine showed better performance at high elevations (300~500m), but Slash Pine was better at low hill and coastal regions. Loblolly Pine and Slash Pine grew faster than Masson Pine in low hill and mountains of central subtropical regions. Loblolly Pine was the best at low elevations of northern subtropical regions when compared with local Masson Pine and Slash Pine.