J Integr Plant Biol. ›› 2007, Vol. 49 ›› Issue (4): -.DOI: 10.1111/j.1744-7909.2007.00373.x
• Stress & Phytochemistry •
Fu-Cang Zhang, Shao-Zhong Kang, Fu-Sheng Li and Jian-Hua Zhang
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 NH4+/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 NH4+/NO3?ratio was 0.5:0.5, fresh seedling weight, root length, and H2PO4?(P), K+, Ca2+, 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 NH4+/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.
Key words: cabbage (Brassica campestris), N nutrition, NH4+/NO3?ratio, plant growth, plant nutrition.
Fu-Cang Zhang, Shao-Zhong Kang, Fu-Sheng Li and Jian-Hua Zhang. Growth and Major Nutrient Concentrations in Brassica campestris Supplied with Different NH4+/NO3- Ratios[J]. J Integr Plant Biol., 2007, 49(4): -.
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URL: https://www.jipb.net/EN/10.1111/j.1744-7909.2007.00373.x
https://www.jipb.net/EN/Y2007/V49/I4/