摘要
为探究氮素形态对菠菜生长和品质的影响,试验采用盆钵培养的方法,在总氮浓度为15 mmol/L的条件下,设置了5种NO_3^--N与NH_4^+-N配比(分别为100:0、75:25、50:50、25:75和0:100),测定了5种铵硝配比条件下菠菜生长与品质相关指标。结果表明:与NH_4^+-N相比,NO_3^--N更有利于菠菜生长与Vc积累。适当增加NH_4^+-N比例后,Vc含量虽显著降低,但对菠菜的生长却无显著影响,并可显著降低可食用部分硝酸盐含量。因此,为了提供高产、低硝酸盐的优质菠菜,笔者认为适宜的NO_3^--N?NH_4^+-N为50:50。
A pot experiment was adopted to investigate the effects of nitrogen forms on growth and ediblequality of Spinacia oleracer L. The total nitrogen concentration in nutrient solution was 15 mmol/L and 5different kinds of ratios of NO3^--N and NH4^＋-N（100：0、75：25、50：50、25：75 and 0：100） were designed, andindexes of growth and quality were determined, respectively. The results showed that NO3^--N was superior to NH4^＋-N on growth of Spinacia oleracer L and Vc accumulation. Vc concentration decreased significantly afterthe addition of NH4^＋-N, but it had little effect on growth of Spinacia oleracer L, and remarkably decreasednitrite content in edible parts. The reasonable ratio of NO3^--N and NH4^＋-N was 50：50 for the growth of Spinacia oleracer L with high yield and low nitrate content.
出处
《中国农学通报》
2017年第16期36-40,共5页
Chinese Agricultural Science Bulletin
基金
实验室开放项目"NH4+-N与NO3--N不同配比对菠菜硝酸盐含量的影响"(15K135)
关键词
菠菜
氮素形态
生长
品质
Spinacia oleracer L
nitrogen forms
growth
quality
