优质棉沧198多茎株型密度适应性研究

Study on Adaptability of Density of Multi-stem Cotton Cang198

为探讨棉花多茎株型密度适应性，充分挖掘优质棉沧198的增产潜力，在种植密度1.5万～10.5万株／h^2。范围内设置6个水平，调查了不同密度处理下主茎和叶枝的主要生育性状及产量指标，测定了不同生育时期的叶面积动态和干物质生产量。结果表明：棉花多茎株型栽培适宜的种植密度为3.3万～5.1万彬h^2。。在该密度范围内，多茎株型栽培的棉花主茎与叶枝发育协调，能建造高质量的光合系统，功能叶片数量多，延缓棉株衰老，干物质生产能力较强，生殖体分配率较高，增产幅度大，可以实现高产简化栽培的目的。

The suitable density of multi-stem cotton was studied to exploit fully the yield potential of Cang 198. The main growing characters and yield indexes of main stem and leafy shoot under different densities were investigated, and the leaf area and dry matter accumulated amount during growth period were determined. The results showed that the suitable density was 33000- 51000 plants/h^2. Under this density range, the main stem and leafy shoot developed harmoniously, the high quality photosynthetic system could be formed, the functional leaves increased, plant＇s senescence was delayed, the productivity of dry matter improved, the reproductive organs rate increased, the yield was high, and the high yield and simplified cultivation could be realized.