| 海藻提取物对菠菜硝酸盐积累的影响及机理 |
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| 引用本文： | 孙 锦,韩丽君,于庆文,王 萍.海藻提取物对菠菜硝酸盐积累的影响及机理[J].海洋科学,2006,30(4):6-9. |
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| 作者姓名： | 孙 锦 韩丽君 于庆文 王 萍 |
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| 作者单位： | 1. 甘肃省农业科学院,蔬菜研究所,甘肃,兰州,730070
2. 中国科学院,海洋研究所,山东,青岛,266071 |
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| 基金项目： | 国家863计划项目(2004AA620530) |
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| 摘 要： | 采用对比试验的方法,对海藻提取物对菠菜硝酸盐积累的影响及机理进行了研究。结果表明:在300 kg/hm2的氮肥施用量下,用不同浓度的海藻提取物喷施菠菜叶片,均显著降低硝酸盐含量,且浓度与硝酸盐含量呈极显著的负相关;海藻提取物对菠菜硝酸盐含量不存在稀释作用,并且对土壤硝化细菌数量无明显影响;浓度与硝酸还原酶活性呈极显著的正相关,说明海藻提取物降低菠菜硝酸盐含量的机理是通过增强硝酸还原酶活性来实现的。
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| 关 键 词： | 海藻提取物 菠菜 硝酸盐 机理 |
| 文章编号： | 1000-3096（2006）04-0006-04 |
| 收稿时间： | 2005-06-08 |
| 修稿时间： | 2005-12-12 |
Effect of seaweed extract on nitrate accumulation in spinach and its mechanism |
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| SUN Jin,HAN Li-jun,YU Qing-wen,WANG Ping.Effect of seaweed extract on nitrate accumulation in spinach and its mechanism[J].Marine Sciences,2006,30(4):6-9. |
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| Authors: | SUN Jin HAN Li-jun YU Qing-wen WANG Ping |
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| Institution: | 1. Vegetable Institute of Gansu Academy of Agriculture Science, Lanzhou 730070 , China; 2. Institute of Oceanology,the Chinese Academy of Sciences, Qindao 266071,China |
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| Abstract: | Using comparable experiments,the effect and mechanism of seaweed extract on nitrate accumulation in spinach were studied,the results showed that under the condition of 300 kg/hm~(2)of N-utilizing,when spraying different concentrations of seaweed extract to spinach leaves,every treatment of seaweed extract concentration may dramatically decrease nitrate content,and the relation between concentration and nitrate content showed an extremely significant level;there did not exist dilution effect,and seaweed extract didn't clearly influence the number of nitro bacteria;the relationship between concentration and NRA dramatically becoms close,and shows the mechanism of seaweed extracts decreasing nitrate content was realized through enhancing NRA activity. |
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| Keywords: | seaweed extract spinach nitrate mechanism |
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