摘要
选用湖北省荆门市具有代表性的籼型杂交中稻和常规中稻品种与新引进的粳稻组合或品系进行对比试验,共设4个品种6个播期。结果表明,随着播期的推迟水稻全生育期不同程度地缩短,出叶速度加快而主茎总叶片数变化较小;籼型杂交中稻早播有利于取得高产,粳型杂交组合产量高低受播期影响较小,早熟中籼稻和中晚熟粳稻常规品种不宜过早播种,品种与播期对产量的交互效应极显著。改变水稻播期首先会影响到结实率和每穗平均总粒数,其次是单位面积有效穗数,欲夺取水稻高产,应在保证一定有效穗数的前提下,主攻大穗和提高结实率。
A total of 4 rice varieties, the local representative indica hybrid varieties, conventional middle rice varieties and the newly introduced japonica varieties, were selected and comparison experiments with 6 planting dates were carried out. The results showed that, with the delay of sowing date, the whole growth period of rice shortened in different degree and the leaves emerged faster. However, the leaf number of main eulm presented small changes. Early sowing was conducive to high yield for the indica hybrid mid-season rice, while affected the yield of japonica hybrid combinations less. The early in- dica rice and late japonica rice of conventional varieties should not be sowed early because the interaction effect of varieties and sowing date was significant. The change of the sowing date of rice would firstly affect the setting percentage and the av- erage total grain number, followed by the effective panicles per unit area, so in order to obtain the high yield of rice, the premise of a certain amount of efficient panicle should be in the guarantee and then the big ears and the setting percentage be focused.
出处
《湖北农业科学》
2015年第21期5211-5216,共6页
Hubei Agricultural Sciences
基金
湖北省水稻"籼改粳"工程项目
关键词
籼稻
粳稻
播期
叶龄
生育期
产量
indica rice
japonica rice
sowing date
leaf age
growth period
yield
