【摘要】 以直立穗型水稻品种辽粳5号和弯曲穗型水稻品种丰锦为试验材料,研究不同氮肥水平对不同穗型水稻品种叶片性状的影响。结果表明,增施氮肥导致水稻叶面积的增加,增加了个体的光合面积,但是气孔密度明显减小,净光合速率和叶绿素含量显著增大。随着施氮量的增多,不同穗型品种的蒸腾速率和气孔导度都明显下降,且肥力对弯穗型品种的蒸腾速率和气孔导度的影响远比对直穗型品种的影响明显。比叶重不同品种存在显著差异,其大小由品种特性决定。更多还原

【Abstract】 The leaf traits of different panicle types Japonica rice varieties under two nitrogen levels(zero and high) was studied by using erect panicle type cultivars Laiojing 5 and curved panicle type cultivar Toyonishiki as materials.The results showed that,with the increase of rate of nitrogen fertilization leaf area of different varieties increased;and photosynthetic area of plant increased while stomatal density obviously reduced;and net photosynthetic rate and chlorophyll content increased remarkably.Transpiration rate and gas diffusion conductivity of different panicle type cultivars decreased obviously with the increasing of the application amount of nitrogen,and the effect of the application amount of nitrogen on transpiration rate and gas diffusion conductivity of curved panicle type variety was far higher than that of erect panicle type cultivar.There were significant difference in specific leaf weight of different cultivars and specific leaf weight was mainly decided by cultivars.更多还原