| 黄土和塿土中Fe, Mn, Cu和Zn向植物根部移动的机理 |
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| 作者姓名： | XU Ming-Gang ZHANG Yi-Ping SUN Ben-Hua |
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| 作者单位： | Department of Soil Science and Agrochemistry, Northwestern Agricultural University, Yangling, Shaanxi 712100 (China);Department of Soil Science and Agrochemistry, Northwestern Agricultural University, Yangling, Shaanxi 712100 (China);Department of Soil Science and Agrochemistry, Northwestern Agricultural University, Yangling, Shaanxi 712100 (China) |
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| 基金项目： | *1Project supported by the Laboratory of Soil and Water of the Agricultural Ministry of China. |
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| 摘 要： | The pot experiments were conducted in the artificial climate laboratories to determine the relative importance of mass flow and diffusion in supplying Fe, Mn, Cu and Zn to wheat, soybean and maize plants growing in loessal soil and lou soil. It was found that the calculated relative contribution of mass flow of iron, manganese, copper and zinc to plant uptake varied from 5% to more than 100%, depending on the crop species and soil types as well as plant growth stage, soil moisture, atmosphere humidity, etc. The results also showed that the major transportation mechanisms of these micronutrients in soil-root system varied with the crop and its growth, climate and soil, significantly. In general, mass flow was more important for Cu and Zn and diffusion was more significant for Fe and Mn at the seedling stage.
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| 关 键 词： | diffusion iron manganese mass flow soil-root system |
Mechanisms for the movement of Fe, Mn, Cn and Zn to plant roots in loessal soil and lou soil |
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| XU Ming-Gang,ZHANG Yi-Ping,SUN Ben-Hua.Mechanisms for the movement of Fe, Mn, Cn and Zn to plant roots in loessal soil and lou soil[J].Pedosphere,1994,4(3):245-254. |
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| Authors: | XU Ming-Gang ZHANG Yi-Ping and SUN Ben-Hua |
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| Institution: | Department of Soil Science and Agrochemistry, Northwestern Agricultural University, Yangling, Shaanxi 712100 (China);Department of Soil Science and Agrochemistry, Northwestern Agricultural University, Yangling, Shaanxi 712100 (China);Department of Soil Science and Agrochemistry, Northwestern Agricultural University, Yangling, Shaanxi 712100 (China) |
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| Abstract: | The pot experiments were conducted in the artificial climate laboratories to determine the relative importance of mass flow and diffusion in supplying Fe, Mn, Cu and Zn to wheat, soybean and maize plants growing in loessal soil and lou soil. It was found that the calculated relative contribution of mass flow of iron, manganese, copper and zinc to plant uptake varied from 5% to more than 100%, depending on the crop species and soil types as well as plant growth stage, soil moisture, atmosphere humidity, etc. The results also showed that the major transportation mechanisms of these micronutrients in soil-root system varied with the crop and its growth, climate and soil, significantly. In general, mass flow was more important for Cu and Zn and diffusion was more significant for Fe and Mn at the seedling stage. |
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| Keywords: | diffusion iron manganese mass flow soil-root system |
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