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Influence of soil water conditions on growth and root porosity of rice

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Summary

The influence of different depths of submergence (6±1 and 3±1 cm) and moisture tensions (0, 20, 60, 350, 500 and 1000 millibar) of lateritic sandy loam soil on root porosity and growth parameters of rice, variety IR8 was studied at two different growth phases under controlled greenhouse conditions. Best rice growth occurred at 3±1 cm submergence and it significantly reduced with the increase of soil moisture tension. Unlike other growth parameters, root length increased as the soil moisture tension was raised. The development of pore spaces in rice roots decreased significantly with the increase in soil moisture tension. However, higher root porosity was observed under greater depths of submergence. Irrespective of soil water condition, the number and dry weight of the root system showed significant positive correlation with root porosity. Oxygen diffusion rate in soil, which increased with the increasing moisture tension, was significantly and inversely related with the porosity of rice root.

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Authors and Affiliations

  1. Agricultural Engineering Department, I.I.T., Kharagpur

    S. Kar (Research Fellow Soil Physicist and Senior Research Fellow)

Authors
  1. S. K. Pradhan
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  2. S. B. Varade
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  3. S. Kar
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Additional information

Contribution from the Agricultural Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal, India.

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Pradhan, S.K., Varade, S.B. & Kar, S. Influence of soil water conditions on growth and root porosity of rice. Plant Soil 38, 501–507 (1973). https://doi.org/10.1007/BF00010690

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  • DOI: https://doi.org/10.1007/BF00010690

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