摘要
采用溶液培养试验,研究了铵态氮对6个小白菜材料的硝酸盐积累特点和对硝酸还原酶活性(NRA)的影响。同时探讨了铵态氮对根系吸收NO3-的速率及对品质与产量的影响。结果表明,铵态氮能够显著降低小白菜体内硝酸盐累积,而且,本研究发现铵态氮不是通过加快硝态氮代谢降低硝酸盐累积,而是通过抑制根系对硝态氮的吸收降低硝酸盐累积。本研究还发现,适当的铵态氮和硝态氮比例能够提高小白菜产量和品质,而单一的铵态氮显著降低小白菜产量和品质。
The effects of NH＋4-N on nitrogen accumulation and NRA in six genotype of pakchoi were studied by using solution culture.Meanwhile,the qualities,yield and the absorption rate of NO-3 in root under NH＋4-N treatment were investigated.The results indicated that the nitrate accumulation was significantly decreased;moreover,the decrease of nitrate accumulation was caused by restraining of the absorption of NO-3 in root,while not accelerating the metabolism of NO-3-N.In addition,it was found that the qualities and the yield could be greatly improved by proper ratio of NH＋4-N and NO-3-N,while,significantly decreased with NH＋4-N as the single N provider.
出处
《华北农学报》
CSCD
北大核心
2010年第6期221-224,共4页
Acta Agriculturae Boreali-Sinica
基金
江苏省自主创新基金(CX(09)604)
国家科技支撑计划(2006BAD13B06
2006BAD01A7)
