大白菜不同品种对硝酸盐积累差异的研究

Studies on the Difference of Nitrate Accumulations of Different Varieties of Chinese Cabbage

将17个大白菜品种在高浓度氮素水平下营养液栽培,分析各品种不同时期硝酸盐含量,发现不同品种之间硝酸盐含量差异达到极显著,最高和最低者相差两倍以上。硝酸还原酶的活性同硝酸盐含量相关性达到显著负相关,但是也有硝酸盐含量低,同时硝酸还原酶活性也低的品种,通过分析认为可以通过育种途径培育出硝酸盐低积累量的品种。

17 Chinese cabbage varieties were cultivated in high density nitrogen solution to analyze the nitrate content of different varieties of different periods. The result showed that the difference of content of nitrate reached extremely remarkable between different varieties, the highest and the the most low one differ by more than two times. The nitrate reductase activity and the nitrate content reached evidently negative correlation, but there were also such varieties exist that the nitrate content was lower and the nitrate reductase activity was also lower. Through analysis we can draw a conclusion that it can be cultivated through breeding way for the varieties with lower quantity of nitrate accumulations.