环境因子对大白菜硝酸盐含量的影响

为探索环境条件对大白菜硝酸盐积累的影响,选用3个硝酸盐富集力不同的大白菜品种,利用水培方式栽培;同时创造不同的环境条件,观察在不同的环境条件下不同品系大白菜硝酸盐含量的差异,为降低大白菜硝酸盐含量提供参考.结果表明,在诸多的环境条件中,光照条件、温度条件、水分条件、根际氧气条件、盐胁迫等因素,均对不同品系大白菜硝酸盐含量有明显的影响.同时,在不同品系大白菜中,硝酸盐富集力高的大白菜品系随环境条件的改变,硝酸盐含量变化较大;而硝酸盐富集力低的大白菜品系硝酸盐含量变化较小.因此,可以通过控制环境条件和培育新品种来降低大白菜硝酸盐含量.

Effects of environmental factors on nitrate content of Chinese cabbage

To explore the influences of environmental conditions on Chinese cabbage nitrate accumulation, three Chinese cabbage varieties, with different nitrate enrichment abilities, were selected to be cultured in hydroponics in order to observe the differences of nitrate content among different genotypes of Chinese cabbage in different environmental conditions and to provide the references to depress the nitrate content of Chinese cabbage. The result showed that those environmental conditions, such as light, temperature, moisture, aeration conditions in hydroponics and salt stress, obviously influenced the nitrate content of Chinese cabbages of different genotypes. Among different genotypes, the nitrate content of the Chinese cabbage of high nitrate enrichment ability changed most with the changes of environments. While that of those varieties of low nitrate enrichment ability changed little. Therefore, the nitrate content of Chinese cabbage can be reduced by controlling environmental conditions and cultivating new breeds.