KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
권호 표지

Chemical and Physical Characteristics of Expanded Rice Husk Medium on Growth of Rice Seedling

  • Published : 2005.06.01
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Abstract

Expanded rice husk (ERR) is different from commercial rice seedling media in chemical and physical properties such as pH, permeability, and water content. This study was conducted to test a possibility of improving rice seedling growth by improving the texture of ERR as a rice seedling medium. The seedling media used were a commercial seedling medium (CSM), rice husk, and ERR 1, 2, 3, and 4 with different expansion degrees. The pH of the ERHs ranged from 6.3 to 6.8. As the expansion rate increased, ERR particle sizes decreased, and water permeability and absorption rates improved. No significant differences in shoot dry weight and rate of maturity were found among the seedlings cultivated in the different ERH media. However, the mat formation of seedling roots became loose as the expansion rates were decreased. Further studies are necessary to determine the cause of poor root growth in ERH media.

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References

  1. Cha, G. C. 1996. Study on how to use expanded rice husk. Report at Green Engineering Ltd. 44-45 (In Korean)
  2. Han, P. J , Y. T. Oh, and N. G. Park. 1983. Experiment to use expanded rice husk. Exp. Report at Agri. Sci. Inst. 888-902. (In Korean)
  3. Kim, J -Y, K -M. Kim, and J.-K. Sohn 2003. Effect of nursery soil made of expanded rice hull on rice seedling growth. Kor. J Crop Sci. 48(3): 179-183. (In Korean)
  4. Kim, K. H , S. H. Lim, Y. I. Narngung, and K. C. Yoo. 2000 Evaluation on the physical and chemical properties of expanded rice hulls as hydroponic culture medium. J. Bio-Environmental Control, 9 : 73-78. (In Korean)
  5. Kim, S. S., M. G Choi, S. Y. Lee, S. Y. Cho, and B. T. Jun. 1996. Nutrient absorption and endosperm consumption in rice seedling. Kor. J. Crop Sci. 41 : 405-410. (In Korean)
  6. Ko, J.1998. Bioassay and analysIs of allelopathic substances in rice (Oryza sativa L.) husks. M. Agri Thesis, Kangwon National Univ. (In Korean)
  7. Lee, K. K. 1997. Development of substrates for the fruit vegetable nutrient solution culture with several mineral residues and extruded rice chaff. Doctoral dissertation, Kon-Kuk Univ (In Korean)
  8. Lee, J. H., Y. D. Yun, and H. O. Choi 1977. Rice seedling establishment for machine transplanting I Effects of seed bed soils and soil pH on the physical disorders of seedlings and their control. Kor. J. Crop Sci. 22 . 27-31.(In Korean)
  9. Lee, J.-W.1999. Improvement of physicochemical properties of rice hull-based substrate for raising seedlings. Ph D. Diss , Seoul National Univ. (In Korean)
  10. Mazurak, A. P. 1950. Effect of gaseous phase on water-stable synthetic aggregate Soil Sci. 69: 135-148 https://doi.org/10.1097/00010694-195002000-00005