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池杉原产美国东南部沿海一带,垂直分布可达530米,常见于河滩、海岸的水湿地区,是著名的耐水湿树种。国内引种以往也多植于水湿地区。近年不少地区已开始引种到丘陵地区。池杉发展到丘陵干旱地区,能否生长,成林,成材?生长适应性比本地杉木如何?这是大家关心的问题。为此,我们对1956年以来历年在丘陵红壤地区营造的池杉试验林进行了总结,并对全省丘陵地区池杉生长情况作了一些调查。现将试验与调查材料归纳分析如下: 丘陵造池杉是1956年由原长沙林校定植于树木标本园开始的,同时定植的有杉木,柏木、松类等树种。1963年我们在调查中发现池杉生长比杉木快,长势旺盛,故1964年选择在丘陵较瘠薄地区作了扩大造林试验。1974年在
Ipomoea native to the southeastern United States coastal area, vertical distribution up to 530 meters, common in river beaches, coastal wet areas, is well-known water wet tree species. In the past introduced more plants in the wet areas. In recent years, many areas have begun to be introduced to hilly areas. Ipomoea hay to the hilly areas, can grow, into a forest, timber? Growth adaptability than the local fir how? This is everyone’s concern. For this reason, we summed up the test of Ipomoea tainensis in the hilly red soil region in the past 1956 and made some surveys on the growth of Ipomoea cynanchum in the hilly region of the province. Now the test and survey materials are summarized as follows: Hilly made of fir is 1956 by the original Changsha forest school planting in the tree specimen began, at the same time planted fir, cedar, pine and other tree species. In 1963, we found in the survey that the growth of Ipomoea japonica was faster and firmer than that of Cunninghamia lanceolata. Therefore, in 1964, I chose to expand the afforestation experiment in the barren hills. In 1974