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种子是植物繁殖的源泉,拥有足够数量、品质优良的种子是植物天然更新的基础。陆均松(Dacrydium pectinatum)是罗汉松科陆均松属分布于我国的唯一种,属国家二级保护植物。20世纪60—90年代,由于对陆均松天然林实施了不合理的经营措施,导致陆均松天然林资源不断减少,天然更新受到严重影响。本文以海南霸王岭长臂猿国家级自然保护区内的陆均松天然林为对象,采集陆均松种子,测定分析陆均松种子数量和品质,结果表明:陆均松有效种子数量严重不足、品质极差。共采集种子180 032粒,其中实心种子仅占全部采集种子的4.46%,成熟的实心种子仅占采集种子的0.05%,91%的成熟种子被动物或鸟类侵食,生命力染色试验着色率为3.11%,种子发芽率为0.02%。
Seeds are the source of plant propagation. Having a sufficient number of seeds of good quality is the foundation of the plant’s natural regeneration. Dacrydium pectinatum (Dacrydium pectinatum) is the only species of Pinus armandii distributed in our country, belongs to the national second-class protected plants. In the 1960s and 1990s, due to the unreasonable management measures of Lujusong natural forest, the natural forest resources of Lujusong continued to decrease, and the natural regeneration was severely affected. In this paper, Lu Jun Song natural forest in Bailingling gibbon national nature reserve of Hainan was taken as the object, the seed of Lujusong were collected, the seed quantity and quality of Lujusong were measured and analyzed. The results showed that the effective seed quantity of Lujusong was seriously insufficient and the quality was very poor. A total of 180 032 seeds were collected, of which solid seeds accounted for only 4.46% of the total collected seeds, mature solid seeds accounted for only 0.05% of the collected seeds, and 91% of the mature seeds were invaded by the animals or birds. The vitality of the test was 3.11 %, Seed germination rate of 0.02%.