机插不同基本苗数条件下成穗规律调查与氮肥方案优化

Investigation of Panicle Law and Optimization of Nitrogenous Fertilizer on Machine-planting under Condition of Different Basic Seedling

为调查研究机插本田在不同密度(基本苗数)条件下的分蘖发生规律与成穗规律,并据此优化施氮方案,进行全生育期的定点跟踪观测。结果表明:在密度过低时,穗数偏少且穗型不整齐,难以高产;在密度过高条件下,高位小穗蘖在群体中占比过高,易造成群体质量恶化。机插水稻的本田施肥原则应为:基肥少施,蘖肥晚施,穗肥重施。

In order to investigate tillering law and panicle law under condition of different basic seedling, the test made a designated tracking observation. The result indicated when the density was too low can cause low spike and untidy, so it difficult to achieve high yield, When the density was too large can cause spikelet ratio was too high to cause loss of population quality. So it summarized principle of fertilizer with less application of base fertilizer, late application of tiller fertilizer and heavy Panicle fertilizer.