| 长期定位施氮条件下菜田氮素循环的研究 |
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| 引用本文： | 葛晓光,王晓雪,付亚文,刘秀茹.长期定位施氮条件下菜田氮素循环的研究[J].中国蔬菜,1999,1(1):5-0. |
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| 作者姓名： | 葛晓光 王晓雪 付亚文 刘秀茹 |
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| 作者单位： | 沈阳农业大学蔬菜科学系; |
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| 摘 要： | 在长期定位施氮试验条件下研究了不同施肥处理的土壤Ｎ素平衡、土壤Ｎ库容量、ＮＨ３挥发量、ＮＯ３ Ｎ淋溶量以及Ｎ素循环强度的变化。从５ａ（年）１０茬蔬菜的Ｎ素施入及携出累计量计算，除对照外，Ｎ素平衡强度最高为２６９．６％（Ａ１Ｂ１），最低为４９．４％（Ａ３Ｂ３），平均为１６２．５％。Ｎ素的盈亏量与Ｎ库容量相关显著（ｒ＝０．６５９９）。土壤的ＮＨ３挥发量及ＮＯ３ Ｎ淋溶量随施Ｎ量的增加而加大。连续多年施用高量有机肥和Ｎ素化肥条件下，ＮＨ３挥发和ＮＯ３ Ｎ淋溶几乎是两条同等重要的Ｎ素损失途径，Ｎ素循环强度高；连续多年施用大量Ｎ素化肥而不施有机肥条件下，ＮＨ３挥发是Ｎ素损失的主要途径，ＮＯ３ Ｎ淋溶损失次之，Ｎ素循环强度低；长期不施肥的处理Ｎ素循环强度极低，土壤中Ｎ素严重亏缺。高投入、高输出的高肥菜田Ｎ素损失多，土壤中Ｎ素富集量增多，应控制Ｎ素化肥用量，适当降低Ｎ素循环强度；低投入、低输出的瘠薄菜田需增加有机及无机Ｎ素的投入，增强Ｎ素循环强度，以提高蔬菜产量。
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| 关 键 词： | 蔬菜 氮肥长期定位施用 N素平衡 |
| 收稿时间： | 1900-01-01; |
Studies on Nitrogen Cycle under Experiment of Long-term,Fixed Position Nitrogen Application in Ve-getable Field |
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| Ge Xiaoguang,Wang Xiaoxue,Fu Yawen,et al..Studies on Nitrogen Cycle under Experiment of Long-term,Fixed Position Nitrogen Application in Ve-getable Field[J].China Vegetables,1999,1(1):5-0. |
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| Authors: | Ge Xiaoguang Wang Xiaoxue Fu Yawen |
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| Institution: | Department of Vegetable Science; Shenyang Agricultural University; 110161 |
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| Abstract: | Under experiment of long term,fixed position N application nitrogen balance,capacity of N reservoir in soil,amount of NH 3 volatilization and NO 3 N leaching and intensity of N cycle were investigated. By calculating sum total of profit and deficit to determine intensity of N balance,the maximum N balance intensity was 269.6%{A 1B 1},the minimum was 49.4%{A 3B 3},average was 162.5%. There was significant corre llation between amount of profit and deficit of N and capasity of N reservoir{r=0.659... |
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| Keywords: | Long term Fixed position N application in vegetable field Nitrogen balance NH 3 volatilization and NO 3 N leaching Intensity of N cycle |
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