论文部分内容阅读
湿地松(Pinus elliottii)原产美国东南部,我国自引种栽培以来,表现优良,已进行大面积造林。我们从1981年开始探讨湿地松无性系造林及无性系选育工作。现将试验的进展情况,小结如下: 一、材料与方法供试材料为超级苗的针叶束和优良家系优势苗的针叶束。用水培法将针叶束培育成无性系苗木,并对无性系进行苗期测定。在苗期测定的基础上,留优去劣,将中选的无性系苗木用作造林试验。1981年培育的无性系苗木,1982年3月造第一块试验林,株行距3×4米,造林按随机区组排列,3株小区,4次重复,以一般实生苗做对照。1982年
Pinus elliottii is native to the southeastern United States. Since its introduction and cultivation in China, Pinus elliottii has performed well and afforestation has been carried out on a large scale. We started from 1981 to study the Pinus elliottii clonal afforestation and clonal breeding. Now the progress of the experiment, the summary is as follows: First, the material and methods for the test material for the super seedlings and the superior family of superior seedling needle bundle. The hydroponics method was used to cultivate the needle bundle into clonal seedlings, and the clonal determination of clones was carried out. On the basis of the seedling determination, the superior clones were selected as clonal seedlings for clonal afforestation. 1981 cloned seedlings, March 1982 made the first test forest, spacing 3 × 4 m, afforestation arranged by random blocks, 3 plots, 4 replicates, with the general seedlings as a control. 1982