不同水氮管理对苋菜和菠菜的产量及硝酸盐含量的影响

Effect of different water and nitrogen management on yield and nitrate content of amaranth and spinach

通过田间试验研究不同水氮管理对苋菜和菠菜的产量、水分利用效率及硝酸盐含量的影响。结果表明,在同一水分处理条件下,不同的土壤供氮水平对苋菜和菠菜的产量均无显著差异,而各水分处理间也无显著差异,但水分利用效率却以W1处理(农民习惯灌水方式)为最低;苋菜和菠菜中硝酸盐含量主要受土壤的供氮量的影响,其次是土壤含水量,因此,降低土壤供氮量的同时适当降低土壤含水量,是提高水分利用效率和蔬菜品质的有效方法之一。

Field experiment was conducted to study the effect of water and nitrogen on yield and nitrate content of amaranth (Amaranthus tricolour) and spinach (Spinacia oleracea) and their water use efficiency. The results showed that there were no significant differences in yield of amaranth and spinach with different nitrogen supply rate in soil under uniform water treatment, and no significant differences in different water treatment. But W1(traditional water treatment method ) was the lowest in water use efficiency. Nitrate content of amaranth and spinach was affected by supply nitrogen rate in soil mainly, the second was soil water content. So it is one of the effective method to decrease nitrogen supply rate in soil at the same time decreasing properly soil water content, in order to increase water use efficiency and vegetable quality.