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פותח על ידי קלירמאש פתרונות בע"מ -
Water absorption by swelling leguminous seeds as affected by water potential and external mechanical constraints
Year:
1985
Source of publication :
Israel Journal of Botany
Authors :
הדס, אביבה
;
.
Volume :
34
Co-Authors:
Hadas, A., Division of Soil Physics, Institute of Soils and Water, Agricultural Research Organization The Volcani Center, P.O. Box 6, Bet Dagan, 50 250, Israel
Facilitators :
From page:
7
To page:
16
(
Total pages:
10
)
Abstract:
The Collis-George/Melville model of water uptake by swelling seeds was used to determine the diffusivity to water of pea, chickpea and vetch seeds as affected by external solution and water potential. These values were compared with the Hadas/Russo results for the same seeds. Soil density changes at the seed-soil contact interface were calculated and the approximate pressures exerted on the soil by the swelling seeds were evaluated from consolidation test data for the sand and silty soils used in the experiments. Seed diffusivity to water according to the Collis-George/Melville model was in close agreement with the Hadas/Russo data only for the later part of the imbibition process when the seeds are fully imbibed or nearly so. The non-swelling Hadas/Russo model cannot be expected to yield accurate values at low seed moisture contents. The Collis-George/Melville model failed to yield consistent values for vetch seeds due to their partially impermeable seed coat. As expected, the calculated diffusivities to water of the seeds decrease as the external potential becomes more negative. Due to soil compaction during the imbibition process, the volume of the germinating seeds was smaller than that of free-swelling seeds under the same external water potential conditions. Soil mechanical constraints and water stress caused delayed germination but did not affect final germination. Their specific effects could not be differentiated under the present experimental conditions. © 1985 Taylor and Francis Group, LLC.
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1080/0021213X.1985.10677004
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22414
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:51
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Scientific Publication
Water absorption by swelling leguminous seeds as affected by water potential and external mechanical constraints
34
Hadas, A., Division of Soil Physics, Institute of Soils and Water, Agricultural Research Organization The Volcani Center, P.O. Box 6, Bet Dagan, 50 250, Israel
Water absorption by swelling leguminous seeds as affected by water potential and external mechanical constraints
The Collis-George/Melville model of water uptake by swelling seeds was used to determine the diffusivity to water of pea, chickpea and vetch seeds as affected by external solution and water potential. These values were compared with the Hadas/Russo results for the same seeds. Soil density changes at the seed-soil contact interface were calculated and the approximate pressures exerted on the soil by the swelling seeds were evaluated from consolidation test data for the sand and silty soils used in the experiments. Seed diffusivity to water according to the Collis-George/Melville model was in close agreement with the Hadas/Russo data only for the later part of the imbibition process when the seeds are fully imbibed or nearly so. The non-swelling Hadas/Russo model cannot be expected to yield accurate values at low seed moisture contents. The Collis-George/Melville model failed to yield consistent values for vetch seeds due to their partially impermeable seed coat. As expected, the calculated diffusivities to water of the seeds decrease as the external potential becomes more negative. Due to soil compaction during the imbibition process, the volume of the germinating seeds was smaller than that of free-swelling seeds under the same external water potential conditions. Soil mechanical constraints and water stress caused delayed germination but did not affect final germination. Their specific effects could not be differentiated under the present experimental conditions. © 1985 Taylor and Francis Group, LLC.
Scientific Publication
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