【摘要】 为了对无公害蔬菜生产科学施肥提供理论依据,进行了不同施肥处理对鸡毛菜生物量、硝酸盐含量及硝酸还原酶活性的影响试验。结果表明,鸡毛菜生物量、硝酸盐含量及硝酸还原酶活性均随施肥量的增加而增加,其中,当施肥量超过0.3 g/盆时生物量开始下降,而硝酸盐含量却大幅度上升。氮肥施用量以22.5 kg/667m2为宜。更多还原

【Abstract】 A Chinese cabbage variety(605) was tested under different nitrogen application amount to study the effects on its biomass,nitrate content and nitrate reductase activity and to provide a theoretical reference for production of pollution-free vegetable.The results showed that the biomass,nitrate content and nitrate reductase activity increase with increment of nitrogen application amount,and the biomass decreases and nitrate content increases by a large margin when nitrogen application amount is 0.3 g/pot.The optimum nitrogen application amount is 22.5 kg/667m2 in production of pollution-free vegetable.更多还原