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以暖季型草坪草狗牙根和冷季型草坪草草地早熟禾为材料，用二因素二次正交旋转组合设计，对９个不同播种比例混播草坪的种群生物量动态及种间竞争进行了研究。结果表明：混播草坪中草地早熟禾生物量均在６月中旬达到高峰，其中有两个处理在１１月中旬达到第二次高峰，其他处理第二次高峰不明显。狗牙根生物量在夏季有明显高峰，为单峰型。３月下旬至５月中旬草地早熟禾竞争力强，６月下旬至９月中旬狗牙根竞争力强。５月下旬至６月中旬，９月下旬至１０月中旬狗牙根与草地早熟禾竞争激烈。
Taking the warm season bermudagrass and the cold season turfgrass Kentucky bluegrass as material, the population dynamics and interspecific competition of 9 mixed sowing turfgrasses were studied by means of quadratic quadratic orthogonal rotation combination design the study. The results showed that the biomass of Kentucky bluegrass reached its peak in mid-June, of which two treatments reached the second peak in mid-November and the second peak was not obvious in other treatments. Bermudagrass biomass in summer has a distinct peak, a single peak. From late March to mid-May, Poa pratensis is very competitive and from late June to mid-September, Bermudagrass is highly competitive. From late May to mid-June, from late September to mid-October bermudagrass is highly competitive with Poa pratensis.