摘要
盆栽试验结果表明 ,不同氮肥品种中以硫酸铵最好 ,菠菜产量高且硝酸盐含量低 ;菠菜产量和硝酸盐含量随氮肥用量增加而增加 ,氮肥用量宜控制在 1.92 g/盆 (相当于 360 kg N/hm2 )以下。氮肥施用方式以基肥为主 ,追肥为辅 ,即前重后轻的方式较好。菠菜的收获时间至少应在追肥两周后进行 ,以保证上市质量。
Different nitrogenous fertilizers and different application amounts of nitrogen fertilizer are adopted to investigate their influences on the yield and nitrate content of spinach in a pot trial. This study demonstrates that (NH 4) 2SO 4 is the first choice of nitrogen fertilizer in relation to increasing yield of spinach and decreasing content of nitrate.NH 4Cl and (NH 4) 2CO 3 are the second. The proper nitrogen fertilizer is under 1.92g per pot (20cm×20cm) (equal to 360kgN/ha) and proper manner of applying N fertilizer is 70% N of a dose as basal application and 30% N of the dose as top fertilization.
出处
《贵州农业科学》
CAS
2001年第1期22-24,共3页
Guizhou Agricultural Sciences
基金
贵州省自然科学基金资助项目[(1999)308]
