中国农业气象

• 论文 • 上一篇    

亚优2号高产的温光生态特性及其应用

李林;张更生;   

  1. 江苏省农业科学院现代化所,江苏省农业科学院现代化所,
  • 出版日期:1993-06-10 发布日期:1993-06-10

Studies on the Thermal-and Photo-Ecological Characteristics of High Yield in Hybrid Rice Cultivar Yayou 2 and its Application

Li Lin Zhang Gengsheng (Institute of Agricultural Modernization, Jiangsu Academy of Agricultural Sciences, Nanjing 210014)   

  • Online:1993-06-10 Published:1993-06-10

摘要: 亚优2号属中熟中稻类型的籼粳亚种间杂交组合,感温性明显强于感光性.生育期对氮素的反应仅次于温度,日长因子影响最小,它们的直接通径系数依次为0.5209、-0.5756、0.3067.它在减数分裂期与抽穗开花期对低温较敏感,要求适宜温度比耐寒性较差的籼稻还显著偏高,而抗高温的能力却明显超过较耐高温的籼稻.抽穗开花期如光强减弱,则严重影响颖花育性,结实率显著下降.因此,该组合抽穗开花期高温强光有利灌浆结实.

关键词: 水稻, 高产, 生态特性

Abstract: Yayou 2, one of hybridized combinations of Indica/Japonica, belongs to medium rice varieties. Its response to temperature is larger than that to photoperiod. The response of growth duration to nitrogen is next to that to temperature, and the effect of day length is the smallest. Their direct path coefficients are 0. 5209, -0. 5756, and 0. 3067, respectively. Yayou 2 is more sensitive to lower temperature at the reduction division stage and the heading-flowering stage, and its suitable temperature is remarkablely higher than that of Indica rice cultivars with weaker resistance to coldness; however, its resistance to high temperature is stronger than that of Indica rice varieties. Lower light intensity in heading-flowering period effects on spikelet fertility baddly, with the percentage of full grains being notably decreased. Therefore, high temperature and strong light are advantageous to increase in spikelet fertility and grain filling of the hybrid rice cultivar Yayou 2.

Key words: Rice cultivar Thermal-and photo-ecological characteristics, Rice cultivar Thermal-and photo-ecological characteristics