| 冬小麦—夏玉米轮作周期内碱解氮、硝态氮时空变化及施氮安全值的研究 |
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| 引用本文： | 张智猛,戴良香,张电学,常连生. 冬小麦—夏玉米轮作周期内碱解氮、硝态氮时空变化及施氮安全值的研究[J]. 土壤通报, 2004, 35(1): 38-42 |
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| 作者姓名： | 张智猛 戴良香 张电学 常连生 |
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| 作者单位： | 河北职业技术师范学院,河北,昌黎,066600 |
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| 基金项目： | 河北省科委“九五”重点攻关课题 |
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| 摘 要： | 利用 3年 6季氮肥试验研究了冬小麦—夏玉米轮作制度下 ,冀东褐土剖面碱解氮、NO-3 -N含量时空迁移变化和土壤氮素安全值指标。结果表明 ,土壤碱解氮自上而下依次递减 ,NO-3 -N呈“V”字型变化 ,二者均与施肥水平及植株生长状况密切相关 ,在 2 0～ 40cm区域出现碱解氮亏缺区 ,N2处理较为明显。N2处理的地下水NO-3 -N含量已超标 ,建议高产条件下土壤环境投氮安全值为 42 0～ 450kghm- 2 较为适宜
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| 关 键 词： | 冬小麦—夏玉米 轮作 碱解氮 硝态氮 施氮安全值 |
| 文章编号： | 0564-3945(2004)01-0038-05 |
| 修稿时间： | 2002-10-21 |
Study on Change of Alkali Hydrolysable N and NO-3-N Content in Soil With Time and Space and Secure Use of Nitrogen Amount in the Wheat-maize Rotating System |
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| ZHANG Zhi-meng,DAI Liang-xiang,ZHANG Dian-xue,CHANG Lian-sheng. Study on Change of Alkali Hydrolysable N and NO-3-N Content in Soil With Time and Space and Secure Use of Nitrogen Amount in the Wheat-maize Rotating System[J]. Chinese Journal of Soil Science, 2004, 35(1): 38-42 |
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| Authors: | ZHANG Zhi-meng DAI Liang-xiang ZHANG Dian-xue CHANG Lian-sheng |
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| Abstract: | A 3-year’s N fertilizer experiment was conduced in drab soil in the Northeast of Hebei province to study the changes of Alkali hydrolysable N and NO - 3-N content,and the secure amount of fertilizing nitrogen in crop growimg period in wheat-maize rotating system. The results showed that the Alkali hydrolysable N content tended to decrease.Alkali hydrolysable N was deficient from 20cm to 40cm in soil section, especially that of N2 treatment. NO - 3-N content of N2 treatment in ground water exceeded secure criterion, so suitable amount of nitrogen was 420-450 kg ha -1 . |
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| Keywords: | Wheat-maize rotating system Alkali hydrolysable N NO - 3-N Secure fertilizing nitrogen amount |
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