过量施用氮肥对苋菜和木耳菜硝酸盐含量的影响

Study on Nitrate Content Effect in Edible Amaranth and Malabar Spinach with Application of Excessive Nitrogenous Fertilizer

就苋菜、木耳菜不同施氮水平对其硝酸盐含量的影响进行了研究,目的是为减少氮肥施用中的肥料污染问题提供理论基础。通过试验统计的方法进行设计实验与分析。结果表明:在一定的范围内NO3—含量随施氮量增加而增加,但施肥量超过某一临界值后,产量会下降,而硝酸盐含量仍有上升。同时,蔬菜在不同发育阶段、天气情况、施肥时间长短,NO3—含量也会有所不同。

This experiment studied on the edible amaranth, the Malabar spinach vegetable executed the nitrogen level to conduct the research differently to the vegetables nitric acid salt content influence. It＇s for executes the nitrogenous fertilizer, the reduced fertilizer pollution provides the rationale as well as the promoted special vegetables. Carries on the design through the experimental statistics method to test and to analyze .The result indicated that, the NO3^- content increases in certain scope along with the N application increases, and the fertilizer surpasses, the output can drop, while the nitric acid salt content still had the rise. At the same time, the vegetables in the different developmental stage, the weather situation and the applying fertilizer time length, the NO3^- content also can differ from.