不同抗倒性超级稻的基部节间与抗倒性、产量的相关性分析

Analysis of Correlation between Traits of Basal Internodes and Yield of Super Rice Varieties with Different Lodging Resistance

采用抗倒伏超级稻组合88S/1128和易倒品种准两优527为试验材料,以缓释氮为氮肥,研究了不同氮肥用量下,基部第一伸长节间性状与抗倒性、产量等相关性状的相关性,以为实现不同抗倒性超级稻的高产与抗倒提供技术依据。结果表明:(1)总体上超级稻的基部第一节间长度与抗折力呈显著负相关,与株高显著正相关关系,与产量正相关,但不显著;抗折力与株高显著负相关;(2)抗倒力强的组合88S/1128与抗倒力较差的品种准两优527,基部节间与产量等性状相关性存在差异;易倒品种的第一伸长节间的外径粗度与产量极显著正相关,与穗长显著相关,但组合88S/1128相关性不显著。(3)对于组合88S/112815 kg/667 m2左右纯N为最佳施用水平,对于准两优527,施用纯N量以9 kg/667 m2左右为佳。

To achieve high yield and anti-lodging in super rice varieties with different lodging-resistance,with super rice Combination-88S/1128,which is a lodging-resistance type,and Zhunliangyou-527,which is a lodging type,as materials,the correlation of character of the first elongation internode were analyzed on the base(FEI),yield traits and lodging related traits under different fertilizer levels of slow-release nitrogen fertilizer.The results showed that: (1) Overall,for super rice the length of FEI was significantly negatively correlated with the fracture resistance and significantly positively correlated with plant height and showed positive correlation with yield,but not significantly; fracture resistance was significantly negative correlation with plant height; (2) The correlation of traits FEI and yield was different between Combination-88S/1128 and Zhunliangyou 527.For lodging type the outer diameter of FEI was extremely positively significantly correlated with yield and significantly correlated with panicle length,but no significant correlation was shown in Combination-88S/1128.(3) The suitable application of slow-release nitrogen fertilizer was 15 kg/667 m2 for Combination-88S/1128 and 9 kg/667 m2 for Zhunliangyou 527.