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Root tracing by two-layer radioisotope application
Year:
1966
Authors :
Cohen, Yehezkel
;
.
Tadmor, Naftali H.
;
.
Volume :
17
Co-Authors:
Cohen, Y., The Volcani Institute of Agricultural Research, Rehovot, Israel
Tadmor, N.H., The Volcani Institute of Agricultural Research, Rehovot, Israel
Facilitators :
From page:
573
To page:
581
(
Total pages:
9
)
Abstract:
Seedling root penetration of Agropyrum desertorum, Hordeum bulbosum, Medicago hispida, Oryzopsis holciformis, Oryzopsis miliacea, Phalaris tuberosa and Sorghum cernuum under temperature-controlled greenhouse conditions was measured by radioisotope tracing, using soil columns marked with Na 22, P 32, Co 60, Sr 90 and Cs 137 salts. When plants were grown in a nutrient solution, shoot activity was measurable within hours after radioisotope application. P 32, Co 60, Sr 85 and Cs 137 were non-mobile in the soil profile during the periods of investigation. All elements were taken up rapidly from sand cultures. In a loess soil, Co 60 and Cs 137 were adsorbed by the soil and could not be used for tracing. Application of two layers of one radioisotope at widely differing activities, or two radioisotopes with greatly different half-lives allowed simultaneous determination of two rooting depths. Comparison with root development in untreated control columns showed this tracing technique to be more sensitive than conventional methods, even in small-volume containers. © 1966.
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DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29319
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:45
Scientific Publication
Root tracing by two-layer radioisotope application
17
Cohen, Y., The Volcani Institute of Agricultural Research, Rehovot, Israel
Tadmor, N.H., The Volcani Institute of Agricultural Research, Rehovot, Israel
Root tracing by two-layer radioisotope application
Seedling root penetration of Agropyrum desertorum, Hordeum bulbosum, Medicago hispida, Oryzopsis holciformis, Oryzopsis miliacea, Phalaris tuberosa and Sorghum cernuum under temperature-controlled greenhouse conditions was measured by radioisotope tracing, using soil columns marked with Na 22, P 32, Co 60, Sr 90 and Cs 137 salts. When plants were grown in a nutrient solution, shoot activity was measurable within hours after radioisotope application. P 32, Co 60, Sr 85 and Cs 137 were non-mobile in the soil profile during the periods of investigation. All elements were taken up rapidly from sand cultures. In a loess soil, Co 60 and Cs 137 were adsorbed by the soil and could not be used for tracing. Application of two layers of one radioisotope at widely differing activities, or two radioisotopes with greatly different half-lives allowed simultaneous determination of two rooting depths. Comparison with root development in untreated control columns showed this tracing technique to be more sensitive than conventional methods, even in small-volume containers. © 1966.
Scientific Publication
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