| 下辽河平原两种类型水稻土有机氮组分的研究 |
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| 引用本文： | 张玉玲,顾婉宣,丛耀辉,虞 娜,邹洪涛,范庆锋,张玉龙.下辽河平原两种类型水稻土有机氮组分的研究[J].土壤,2015,47(5):1021-1026. |
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| 作者姓名： | 张玉玲 顾婉宣 丛耀辉 虞 娜 邹洪涛 范庆锋 张玉龙 |
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| 作者单位： | 沈阳农业大学土地与环境学院 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目）;国家重点基础研究发展计划（973计划） |
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| 摘 要： | 结合野外调查取样，采用Bremner 法测定下辽河平原两种类型（草甸土型和滨海盐渍土型）水稻土有机氮组分含量。结果表明：（1）两种类型水稻土均以酸解氮为主体。草甸土型水稻土酸解氮含量显著高于滨海盐渍土型水稻土（P<0.01），其分配比例则显著低于滨海盐渍土型水稻土（P<0.01）。（2）两种类型水稻土酸解各组分氮含量及其分配比例的分布规律不同，其差异因酸解氮组分的不同而异。草甸土型水稻土表现为未知态氮 > 氨态氮 > 氨基酸态氮 > 氨基糖态氮，滨海盐渍土型水稻土则表现为氨基酸态氮 > 未知态氮 > 氨态氮 > 氨基糖态氮；草甸土型水稻土酸解氨态氮与氨基酸态氮总量及其分配比例显著低于滨海盐渍土型水稻土（P<0.01），酸解未知态氮含量及其分配比例则显著高于滨海盐渍土型水稻土（P<0.01）。（3）两种类型水稻土酸解氮含量均与其土壤有机碳、全氮含量呈显著正相关（P<0.01）。因此，该地区两种类型水稻土有机氮组分含量及其分配比例的显著差异是影响土壤氮素有效性的重要因素。
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| 关 键 词： | 水稻土 有机氮 酸解各组分氮 下辽河平原 |
| 收稿时间： | 2014/12/25 0:00:00 |
| 修稿时间： | 2/4/2015 12:00:00 AM |
Research on the Fractions of Soil Organic Nitrogen in Two Types of Paddy Soils in Lower Liaohe Plain |
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| ZHANG Yu-ling,GU Wan-xuan,CONG Yao-hui,YU N,ZOU Hong-tao,FAN Qing-feng and ZHANG Yu-long.Research on the Fractions of Soil Organic Nitrogen in Two Types of Paddy Soils in Lower Liaohe Plain[J].Soils,2015,47(5):1021-1026. |
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| Authors: | ZHANG Yu-ling GU Wan-xuan CONG Yao-hui YU N ZOU Hong-tao FAN Qing-feng and ZHANG Yu-long |
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| Institution: | College of Land and Environmental Science, Shenyang Agricultural University |
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| Abstract: | Contents of fractions of organic nitrogen (N) in two types of paddy soil (meadow soil and coastal saline soil) with the Bremner method. It showed that (1) acid hydrolysis N was the dominant fraction of organic nitrogen in two paddy soils. The content of acidolysable N in meadow paddy soil was significantly higher than coastal saline paddy soil (P<0.01), while the distribution proportion of acid-hydrolizable N in meadow paddy soil was significantly lower than coastal saline paddy soil (P<0.01). (2) The regularity of the contents and distribution proportion of the fractions of acidolysable N were different according to the fraction. In meadow paddy soil, the regularity was unknown N>ammonia N> amino acid N> amino sugar N, while in coastal saline soil that was amino acid N> unknown N>ammonia N> amino sugar N. Compared with coastal saline paddy soil, the total content and distribution proportion of acidolysable N and amino acid N in meadow paddy soil were significantly lower (P<0.01), while the content and distribution proportion of acidolysable unknown N were significantly higher (P<0.01). (3) It showed a significant positive correlation between the acidolysable N and soil organic C and total N (P<0.01) in two types of paddy soils. Therefore, the significant difference of the content and distribution proportion of the fractions of organic N were the main factors that affect the different validity of soil N in two types of paddy soils in this region. |
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| Keywords: | Paddy soil Organic nitrogen Fractions of acidolysable nitrogen Lower Liaohe Plain |
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