不同密度下超级稻桂两优2号的群体质量

摘要

以超级稻桂两优2号为供试品种,设5个种植密度研究不同密度下桂两优2号的群体质量.结果表明,种植密度较大有利于植株抽穗期前叶面积指数提高、干物质及氮素积累,因而够苗快,茎蘖数峰值出现早,有效穗教多；但成熟期的叶面积指数、干物质积累量、氮素积累量及产量以中低密度(基本苗密度为54万苗/hm2)处理为好.%With Guiliangyou 2 as testing rice cultivar,five different density treatments were designed to explore their population quality.Results showed that higher density was beneficial for increasing leaf area index,dry matter and nitrogen accumulation before heading.Therefore,it could get enough tillers faster and reach tillers peak earlier as well as obain higher effective panicle number.However,leaf area index,dry matter and nitrogen accumulation,and yield were better with middle and low density (basic seedling 540 000 ind./hm2) treatments in mature stage.