论文部分内容阅读
对北方粳稻栽培品种演变过程中品种性状和硝酸还原酶活力变化的研究表明:1)品种性状在演变过程中有了明显的变化,即从大穗高秆向多穗矮秆的方向变化;2)品种抗倒耐肥性变化的总趋势是由弱到强,其硝酸还原酶活力从高到低的变化。这就是说过去老品种大穗高秆,不抗倒不耐肥,硝酸还原酶活力高,而目前推广品种多穗矮秆,抗倒耐肥,硝酸还原酶活力低。对硝酸还原酶活力与品种性状之间的相关分析进一步指出,品种间单位面积有效穗数与硝酸还原酶活力呈显著的负相关;品种间株高与硝酸还原酶活力呈显著的正相关。
The study on the changes of cultivars traits and nitrate reductase activity during the evolution of cultivated northern japonica rice showed that: 1) the traits of cultivars changed significantly during the evolution, that is, the direction from big stalk to multi-spike dwarf; 2 ) The general tendency of the varieties to resist the change of resistance to fertilizer is from weak to strong, and the nitrate reductase activity changes from high to low. This means that in the past the old varieties of big spike tall, non-resistant to fattening, nitrate reductase activity is high, and now promote the varieties of more spike dwarf, resistant to fertilizer, nitrate reductase activity is low. The correlation analysis between the activity of nitrate reductase and the traits of cultivars further indicated that there was a significant negative correlation between the number of effective panicle per panicle and the activity of nitrate reductase. There was a significant positive correlation between plant height and nitrate reductase activity.