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比较了３个品种在不同密度群体下的几个光合性状及产量的差异。结果表明，主要生长期的群体光合面积、叶绿素总量和干物质重均与密度呈显著正相关，也与最终产量呈显著正相关。品种福蔗８７１０在每亩３５００和４０００段双芽苗下的群体光合性状及产量均明显优于其它处理。福蔗８７１０和福蔗８７１５的分蘖力与群体自动调节能力均比闽糖７０－６１１强，栽培上应采取相应的措施。
The differences of photosynthetic characters and yield of three cultivars under different densities were compared. The results showed that there was a significant positive correlation between population photosynthetic area, total chlorophyll content and dry matter weight, and density, and also positively correlated with the final yield. Variety Fukun 8710 in 3500 and 4000 per mu two-sprout under the photosynthetic traits and yield groups were significantly better than the other treatments. Fir-sugarcane 8710 and sugarcane 8715’s ability to regulate tillering ability and population are better than 70-611, and corresponding measures should be taken in cultivation.