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| Effects of Chinese Cabbage Nitrogen Application Rate on Chinese Cabbage Yields，Nitrogen Utilization，Nitrate Accumulation（Soil & Cabbage）of Potato — Chinese Cabbage Double Cropping System |
| HU Bo1，HAO Yun-feng2，FAN Ming-shou1* |
| 1College of Agronomy，Inner Mongolia Agricultural University，Hohhot 010019，Inner Mongolia，China|2Academy of Agricultural Sciences in Bayannaoer City of Inner Mongolia Autonomous Region，Bayannaoer 015400，Inner Mongolia，China |
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Abstract The effects of Chinese cabbage N application rate on Chinese cabbage yields，nitrogen utilization，nitrate contents，and nitrate nitrogen accumulation in soil were studied under potato-Chinese cabbage double cropping system in Hetao irrigated area of Inner Mongolia with 5 N application rates at Chinese cabbage planting season．The results showed that the yields and the double cropping net economic returns were the highest with the Chinese cabbage N application rate of 120 kg•hm-2|the double cropping system N accumulation and N recovery ratio were enhanced at the total N application rate from 225 kg•hm-2 to 405 kg•hm-2，compared with that of the conventional mono potato production in the open field at the N application rate of 225 kg•hm-2|the nitrate contents in Chinese cabbage and the nitrate accumulations within 0-160 cm soil profiles were increased with the increscent N applied rates．At the Chinese cabbage N application rate was≥120 kg•hm-2，the nitrate contents in Chinese cabbage reached a high level，and the nitrate accumulations within 0-160 cm soil profiles were≥162 kg•hm-2，hence the risk of nitrate contamination in underground water was increased for autumn irrigation．Reasonable N application rate had an effective effects on reducing nitrate contamination in groundwater，reducing nitrate content in Chinese cabbage，and increasing net economic return.
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Received: 09 January 2012
Published: 05 March 2012
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| Cite this article: |
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HU Bo,HAO Yun-Feng,FAN Ming-Shou. Effects of Chinese Cabbage Nitrogen Application Rate on Chinese Cabbage Yields，Nitrogen Utilization，Nitrate Accumulation（Soil & Cabbage）of Potato — Chinese Cabbage Double Cropping System[J]. , 2012, 1(10): 60-65.
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| URL: |
| https://www.cnveg.org/EN/ OR https://www.cnveg.org/EN/Y2012/V1/I10/60 |
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