通过草地群落物种物候期定位观测，研究了植物种的花期分布规律。结果表明：植物种间开花峰值期在时间轴上为聚集型分布，主要集中于3个季节，即春季(4月中旬前后)、盛夏(6月中旬～7月中旬)和夏末秋初(7月末～8月中下旬)；植物科间开花峰值期为随机型分布；优势科——禾本科内种间也为随机型分布。这说明草地群落植物种间在生殖方面的资源竞争不明显，或种间竞争对各个种的开花时间无明显影响；在群落物种多样性维持机制中，花期分化不起主要作用，可能有其它更重要的机制。%The distribution of flowering phase of plant in grassland community was studied by localized observation on phenological phase of species. The results showed that the distribution of peak flowering phases of various species were clumped, and were concentrated in three seasons, spring, midsummer and the end of summer or beginning of fall. Within a family, the distribution of flowering phases of species was random, for example, Gramineae, the dominant family in grassland community. These results indicated there was no competition for living resources for reproduction among species. Some unknown mechanisms rather than the differentiation and formation of flower ha.d an important effect on maintaining species diversity.
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