秧苗平面分布对水稻群体动态、冠层透光率及穗部性状的影响

以分蘖能力较强的水稻品种D优527为材料，研究秧苗平面分布对水稻群体动态、冠层透光率及穗部性状的影响.结果表明:平面分布无序不等距程度越大，群体茎蘖数越多，差异在栽后34 d达显著水平，但齐穗期差异不显著.移栽后水稻不同平面分布群体逐渐呈平面分布无序不等距程度越大茎蘖数变异系数越大的趋势，至拔节期以后达到显著或极显著水平.与均匀分布相比，水稻秧苗不等距平面分布有利于改善群体冠层透光性和成穗质量.

Effects of rice seedlings horizontal distribution on the dynamics of rice population, canopy light transmittance rate and panicle characteristics

The study with stronger tillering hybrid rice ' D-you 527' showed that the more the irregularity of the seedlings horizontal distribution, the more colony stem-tillers the plants would have. Such a difference was significant 34 days after transplanting, but not significant at full heading stage. After transplanting, the trend that the variation coefficient increased with increasing irregularity of horizontal distribution presented gradually, and the difference became significant after jointing stage. Comparing with uniform distribution, an irregular horizontal distribution of the seedlings could benefit the canopy light transmittance rate and the panicle characteristics of rice.