| 土壤电化学特牲的研究——Ⅰ.水稻土的电导与其肥力的关系 |
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| 引用本文： | 于天仁,何羣,蒋柏藩,宣家祥,谢建昌.土壤电化学特牲的研究——Ⅰ.水稻土的电导与其肥力的关系[J].土壤学报,1959,7(Z2):145-158. |
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| 作者姓名： | 于天仁 何羣 蒋柏藩 宣家祥 谢建昌 |
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| 作者单位： | 中国科学院士壤研究所;中国科学院士壤研究所;中国科学院士壤研究所;中国科学院士壤研究所;中国科学院士壤研究所 |
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| 摘 要： | 1.设计了一个在田间直接测定水稻土的电导的电导池,用以鉴别水稻土的肥力状况。根据条件试验,在水稻生长期间通常变动的水分含量范围以内,水分含量的差别可以不予考虑。土壤胶体本身的电荷在电导上的贡献也很小,所以一般也不必考虑。土壤含砂粒较多时,应该加以适当的改正值。2.根据大量的田间测定结果,在酸性的水稻土中,电导与肥力水平成明显相关。施肥的数量和种类对土壤电导发生显著的影响。由于水稻对养分的吸收,所以根际土壤的电导较根外为低,并且随着水稻的生长,而使土壤电导降低。3.酸性水稻土的干土渍水后电导的增加数值与土壤的肥力水平成正相关。这种电导的增加,基本上是由于有机质的分解所致。4.根据与化学分析的对照结果,土壤溶液的电导与阳离子的浓度成明显相关。在引起酸性水稻土电导的阳离子中,钙镁占90—95%,钾占2—8%,铁和铵的数量都在1%以下。5.作者根据研究结果,认为电导可以作为鉴别酸性水稻土的肥力水平的一个简便的综合性参考指标。
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STUDIES ON THE ELECTROCHEMICAL BEHAVIOR OF SOILS I.ELECTRICAL CONDUCTIVITY OF PADDY SOILS IN RELATION TO THEIR FERTILITY |
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| YU TIAN-REN,HO CHUN,CHIANG PEI-FAN,SUAN CHIA-SIANG and SIE CHIAN-CHANG.STUDIES ON THE ELECTROCHEMICAL BEHAVIOR OF SOILS I.ELECTRICAL CONDUCTIVITY OF PADDY SOILS IN RELATION TO THEIR FERTILITY[J].Acta Pedologica Sinica,1959,7(Z2):145-158. |
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| Authors: | YU TIAN-REN HO CHUN CHIANG PEI-FAN SUAN CHIA-SIANG and SIE CHIAN-CHANG |
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| Institution: | Institute of Soil Science, Academia Sinica;Institute of Soil Science, Academia Sinica;Institute of Soil Science, Academia Sinica;Institute of Soil Science, Academia Sinica;Institute of Soil Science, Academia Sinica |
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| Abstract: | For the purpose of utilizing electrical conductivity of paddy soils as an index of soil fertility, both field measurements and laboratory studies were undertaken. A specially prepared conductivity cell with fixed distance between the platinum electrodes was used in field measurements.It was found that for acid and neutral paddy soils of Central China, the electrical conductivity of the plowed layer showed a close correlation with the fertility status of the soil in the majority of cases, especially in the early period of plant growth. The specifics conductivity of the soil decreased and the difference in conductivity between soils became less conspicuous gradually with plant growth, presumably due to the adsorption of nutrient ions by the rice roots. Another evidence supports this supposition, in which the electrical conductivity of the rhizosphere appeared to be less than that of the bulk of the soil. |
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