水稻高产群体结构研究

Effects of High-yielding Population in Rice

选取10个水稻品种进行水稻高产群体结构研究,试验结果表明,穗数较少和较多的品种均不易获得高产,高产品种应具有适宜的穗数;过高的茎蘖数使无效分蘖也增加,分蘖成穗率随着水稻分蘖能力的增加而降低,同时会引起穗子的变小,给实现高产目标造成困难,因此在提高穗数的同时应注意提高分蘖成穗率,创造良好的群体质量;总干物质积累量与最终产量显著正相关,本研究中高产水稻均具有较高的干物质积累量,说明强大的物质生产能力有助于水稻高产目标的实现;植株叶片叶绿素含量高,下降慢,水稻植株抽穗后绿叶面积持续时间延长,水稻群体光合势大,是高产水稻的另一特征。

Ten rice varieties were selected to study the high-yielding population.The results showed that appropriate panicles was a method that can get a high yield;ineffective tillers can increase by excessive tiller number,the increase of the tillering capacity can decrease the effective panicle rate of tillers and lessen the panicle,so in order to create a favorable population quality,it should enhance the panicles and effective panicle rate;the research indicated that dry matter accumulate had significantly positive correlation with yield and it explain that strong capacity of material production can help high yield;it was a other characteristic for high yield that the high chlorophyll content can lengthen the time of green leaf after heading and leaf area duration.