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我省1947年首次引进湿地松、火炬松(下称国外松),该批种子于1950年播种育苗,1951年造林,现仅长沙市保存湿地松27株,火炬松35株。该批树于1961年后开始结实,1966年春用其种子育苗并造子代对比林。我省对湿地松、火炬松的引种推广工作十分重视。1973—1984年共进口湿地松种子29,524公斤,火炬松种子10,182.5公斤。据不完全统计,截至1985年全省国外松造林面积100余万亩,湿地松占70%,绝大部分营造在低山丘陵中的酸性红壤地区,生长良好。为了探讨湿地松、火炬松在我省的适生环境与造林技术,在省林业厅领导下,由省林科所负责组成了国外松协作组。全省按不同生态区域及研究内容设置了19个重点引种试验点,现将试验情况总结如下。
The province introduced for the first time in 1947 the pine, loblolly pine (hereinafter referred to as foreign pine), the batch of seed sowing seedlings in 1950, afforestation in 1951, now only Changsha City, preserved 26 pine and 35 loblolly pine. This batch of trees began to grow well after 1961, and in the spring of 1966, it was raised with its own seed and made into a substitute for the forest. In our province, the promotion and introduction of Pinus elliottii and Pinus taeda are very important. From 1973 to 1984, a total of 29,524 kg of Pinus elliottii seeds and 10,182.5 kg of loblolly pine seeds were imported. According to incomplete statistics, as of 1985, the province’s afforestation area of more than 100 million mu of foreign pine, pine accounted for 70%, most of the hilly areas in the acid red soil to create a good growth. In order to discuss the suitable habitat and afforestation technology of Pinus elliottii and Pinus taeda in our province, under the leadership of the Provincial Forestry Department, the Provincial Forestry Department is responsible for the formation of the International Pine Harmony Cooperative Group. The province has set up 19 key introduction test points according to different ecological regions and research contents, and the test conditions are summarized as follows.