摘要
为探讨减肥对籼稻高产形成的影响,实现绿色增产,以高产氮低效水稻品种丰研425和冈优527为对照,研究了高产氮高效水稻品种江优9527和Q优6号的产量构成、物质积累、叶片光合性状等差异。结果表明,与高产氮低效品种相比,高产氮高效品种的有效穗数有所降低,但每穗粒数、结实率和千粒重均有所增加;高产氮高效品种的干物质积累总量有所降低,但成穗率和收获指数却有所提高。高产氮高效品种群体叶面积指数(LAI)生育前中期相对较小,成熟期增高;剑叶叶绿素含量在灌浆中后期显著增高。
Field experiments were conducted to study the combined increase of high yield and high N use efficiency of rice cultivar in2013 and 2014 at Guiyang city, using two high yield and high N use efficiency cultivars Jiangyou 9527, Qyou 6 and two high yield and low N use efficiency cultivars Fengyan425 and Gangyou527 as materials. The results showed that, compared with the low N use efficiency cultivars, high N use efficiency cultivars have lower effective panicles, lower total dry matter accumulation, but higher grains per panicle, seed setting rate, 1000-grain weight and harvest index. The leaves area index of high N use efficiency cultivars at middle stage were lower than that of low N use efficiency cultivars, but were higher at mature stage, and the SPAD of flag leaf was higher in middle and late filling stage.
出处
《中国稻米》
北大核心
2015年第4期65-67,共3页
China Rice
基金
国家自然科学基金(31360314)
贵州省科技计划项目(黔科合NY字[2012]3043)
贵州省农科院创新基金[黔农科合(2011002)]
贵州省杂交水稻种三产四示范工程项目
关键词
水稻
减肥
高产氮高效
干物质
rice
lower fertilizer
high yield and high N use efficiency
dry matter
