Growth and major nutrient concentrations in brassica campestris supplied with different NH4+/NO3- ratios

Fu Cang Zhang, Shao Zhong Kang*, Fu Sheng Li, Jianhua ZHANG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

In the present study, we investigated whether growth and main nutrient ion concentrations of cabbage (Brassica campestris L.) could be increased when plants were subjected to different NH4+/NO3- ratios. Cabbage seedlings were grown in a greenhouse in nutrient solutions with five H4+/NO3- ratios (1:0; 0.75:0.25; 0.5:0.5; 0.25:0.75; and 0:1). The results showed that cabbage growth was reduced by 87% when the proportion of NH4+-N in the nutrient solution was more than 75% compared with a ratio NH4+/ NO3- of 0.5:0.5 35 d after transplanting, suggesting a possible toxicity due to the accumulation of a large amount of free ammonia in the leaves. When the H4+/ NO3 - ratio was 0.5:0.5, fresh seedling weight, root length, and H2PO4- (P), K+,Ca 2+, and Mg2+ concentrations were all higher than those in plants grown under other NH4+/NO3- ratios. The nitrate concentration in the leaves was the lowest in plants grown at 0.5: 0.5 HM4+/NO3-. The present results indicate that an appropriate NH4+/ NO3- ratio improves the absorption of other nutrients and maintains a suitable proportion of N assimilation and storage that should benefit plant growth and the quality of cabbage as a vegetable.

Original languageEnglish
Pages (from-to)455-462
Number of pages8
JournalJournal of Integrative Plant Biology
Volume49
Issue number4
DOIs
Publication statusPublished - Apr 2007

Scopus Subject Areas

  • Biochemistry
  • Biochemistry, Genetics and Molecular Biology(all)
  • Plant Science

User-Defined Keywords

  • Cabbage (Brassica campestris)
  • N nutrition
  • NH/NO ratio
  • Plant growth
  • Plant nutrition

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