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一、引言 据各地检验,杉木种子发育健全具有发芽能力的一般只占30％左右,其余60％—70％的种子发育异常(涩粒和瘪粒)无生活能力。从而提高了育苗成本费。这是杉木种子工作中长期未能解决的问题之一。当前,许多种子园即将投产利用,如何改善种子的播种品质、降低育苗造林成本,已成为种子园集约管理的当务之急。为此,我们从1976年起对杉木种子生活力的变异进行了研究。现就四年的试验结果,分析和讨论如下。 二、材料和方法 1976年,在福建洋口林场1966年和1975年的嫁接种子园(简称种,下同)和优树收集区(简称收,下同)以及1967年的实生苗种子园内,设置了固定的观测样株。计有无性系(或家系)44个,样树55株。每年从各样株固定的树冠部位(上、中、下),分别随机采摘充分成熟、发育正常和无病虫害的球果10个(每株30个),逐个进行人工解剖,统计出发育健全、涩粒和瘪粒种子的数目,并按球果和样株计算各自所占的百分比率,然后将此值经反正弦换算并进行数理统计分析。
First, the introduction According to local tests, fir seed development with germination ability generally account for only about 30%, the remaining 60% -70% of the seed developmental abnormalities (astringent and shriveled) no viability. Thus raising the cost of raising seedlings. This is one of the problems that the Chinese fir seed has not solved in the long term. At present, many seed orchards are about to be put into operation. How to improve the sowing quality of seed and reduce the cost of seedling and afforestation has become the most urgent task of intensive management of seed orchard. To this end, we have studied the variation of seed viability of Chinese fir since 1976. Now four years of test results, analysis and discussion are as follows. MATERIALS AND METHODS In 1976, at the Yangguo Forest Farm in Fujian Province in 1966 and 1975, the grafted seed garden (referred to as the species, the same below) and the tree collection area (referred to as income, the same below), as well as 1967 Seedling Seed Park , Set a fixed sample observation. There are 44 clonal (or pedigree) families and 55 tree-like species. 10 species (30 plants per plant) of full-ripe, normal-growth and pest-free pests were randomly picked from the crown parts (upper, middle and lower) fixed by various strains each year. Artificial anatomy was done one by one to make statistics of sound development, Astringent and shriveled seeds, and calculate their respective percentages according to the cones and sample strains, then convert the values by arcsine and perform mathematical statistics analysis.