| 土壤水分与氮肥对玉米根系生长的影响 |
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| 引用本文： | 李秧秧,刘文兆.土壤水分与氮肥对玉米根系生长的影响[J].中国生态农业学报,2001,9(1):13-15. |
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| 作者姓名： | 李秧秧 刘文兆 |
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| 作者单位： | [1]中国科学院水土保持研究所,杨陵712100 [2]水利部水土保持研究所 |
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| 基金项目： | 国家自然科学重大基金和"九五”中国科学院重大项目(KZ951-A1-301)与特别支持项目(KZ95T-04-01)共同资助 |
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| 摘 要： | 利用田间小区试验研究了不同土壤水分条件下N肥对根系生长（根长、根重和根冠比）的影响。结果表明,玉米拔节期和开花期无论水分条件如何。施N肥可增加其总根长、麦层根长和根重并使根冠比下降;灌浆期施N肥可增加总根长和表层根长,但正常水分条件下N肥使根重和根冠比下降,而干旱条件下N肥对根重和根冠比则无影响,不同处理根冠比大小与N吸收和分配有很大关系。
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| 关 键 词： | 土壤水分 氮肥 根系生长 玉米 拔节期 开花期 灌溉期 |
| 收稿时间： | 8/3/2000 12:00:00 AM |
| 修稿时间： | 2000年8月3日 |
Effects of soil moisture and nitrogen fertilizer on root growth of corn |
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| LI Yang-Yang and LIU Wen-Zhao.Effects of soil moisture and nitrogen fertilizer on root growth of corn[J].Chinese Journal of Eco-Agriculture,2001,9(1):13-15. |
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| Authors: | LI Yang-Yang and LIU Wen-Zhao |
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| Institution: | Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100;Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100 |
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| Abstract: | When new century comes up,sand storm,raise dust and floating dust weather have happened twelve times in Beijing, bringing great response.According to the 67773 item records of sand storm from the Chinese weather stations during last fifty years after new nation established,it is shown that the sand storm of appearance covers a large region,but the Northwest of China is the center of disaster,it is similar to desertification land distribution.Before 1970 sand storm frequency increased but human didn't pay attention to that because of weak realization of ecoenvironment. From 1970 to 1980 sand storm was the highest frequency,from 1980 to 1990 sand storm frequency in the limited areas had been decreased and the strength reduced.But with regional economy growing,sand storm brings a significent economical loss.The vegetation construction and the environment improvement will give large functions to the decrease of sand storm disaster. |
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