氮肥对小白菜生长及硝酸盐累积的影响

Nitrogen Nitrate Accumulation of Chinese Cabbage and the Influnce Growth

本试验以小白菜为材料,采用土培盆栽的方法,通过设置不同硝态氮与铵态氮配施比例,研究了不同氮素形态与水平配施对小白菜硝酸盐累积及生长状况的影响。结果表明,施肥中硝态氮所占比例大于铵态氮时,对小白菜的株高、叶面积、产量均有显著或极显著的促进作用,但硝酸盐的累积也极显著升高;而当硝态氮与铵态氮的比例为1:1时,小白菜产量较3:1时有所下降,差异不显著,但硝酸盐含量显著下降。因此,硝态氮与铵态氮配比1:1是较为理想的施肥比例。

The experiment used cabbage for the materials. Use earth culture method, design different proportion of nitrationand ammonium to research the effect of different nitrogen forms and levels the nitrate accumulation and growth condition ofthe cabbage. The experimental results show that： the fertilization of nitrate-nitrogen in greater proportion of ammoniumnitrate nitrogen, plant height, the cabbage leaf area, yield significant or very significant role in promoting the accumulationof nitrate, but also very significant increases, and when ammonium nitrate than for 1：1, yields not significant, but nitratecontent but significantly, the proportion of fertilization is best.