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| Effects of Different Nitrogen Supply Levels on Carrot Growth and Nitrogen Utilization in Open Field |
| Chen Qing; Zhang Xiaosheng; Zhang Hongyan; et al. |
| Key Laboratory of Plant Nutrition; MOA; Key Laboratory of Plant- Soil Interactions; MOE; Department of Plant Nutrition; China Agricultural University; Beijing 100094 |
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Abstract Studies on carrot growth and nitrogen utilization with different nitrogen supply levels were conducted in the open field of Beijing suburb. The results showed that the marketable root yield, N uptake and the contents of soluble solids in root tissue increased with applied N rate increasing, however, N uptake did not increase with N applied rate when nitrogen applied rate was over 120 kg.hm-2 N. Under the experimental conditions the suitable N supply level for carrot growth (initial inorganic N + applied fer...
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Received: 27 March 2002
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