黑龙江省水稻根系性状与地上部性状的关系

为了探讨寒地水稻根系性状与地上部性状在不同生育阶段的关系，以黑龙江省的3个超级稻品种和3个普通品种为试验材料进行田间试验。结果表明，根长在不同的生育时期与结实率、各节间长、粗和粒数、一次支梗数呈正相关；根系体积与粒数、株高、与一次枝梗数和二次枝梗数在分蘖盛期为负相关，拔节孕穗期以后为正相关；根系干重在分蘖盛期与穗数呈极显著的负相关（r=-0.92**），而与穗粒数、一次枝梗数和一次枝梗粒数均呈极显著的正相关的关系。根冠比在齐穗后与产量呈显著或极显著正相关（r=0.84*～0.96**）。

Dependence Relation of Aerial Part Traits and Root Traits of Rice in Heilongjiang Province

In order to exploring correlation of aerial part traits and root traits of rice in cold region at different growth stage,3 super rice varieties and 3 common varieties of Heilongjiang province were tested in this study by field experiment.The results indicated that root length was positive correlation with seed setting rate,length and diameter of each internode,seed number per ear and number of first stalk per ear at each stage;volume of root was negative correlation with seed number per ear,plant height,number of the first and the second stalk per ear,respectively at tilling stage,but which was positive correlation after booting stage;dry matter weight was significant negative correlation with number of panicle （r=-0.92 ＊＊ ）,and which was significant positive correlation with seed number per ear,number of the first stalk and seed number of the first stalk.The root/shoot ratio was significant positive correlation with yield （r=0.84 ＊ -0.96 ＊＊ ）.