חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Ionic balance, biomass production, and organic nitrogen as affected by salinity and nitrogen source in annual ryegrass
Year:
1997
Source of publication :
Journal of Plant Nutrition
Authors :
קיפניס, טל
;
.
Volume :
20
Co-Authors:
Sagi, M., Ramat Negev Desert Agroresearch Ctr., D.N. Halutza 85515, Israel
Dovrat, A., Hebrew University of Jerusalem, Dept. Fld. Crops, Vegetables, Genet., Faculty of Agriculture, Rechovot 76100, Israel
Kipnis, T., Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan, Israel
Lips, H., Biostress Research Laboratory, Department of Life Science, Ben-Gurion University of the Negev, Sede Boqer 84993, Israel
Facilitators :
From page:
1291
To page:
1316
(
Total pages:
26
)
Abstract:
Studies on the effects of salinity and nitrogen (N) fertilization on ionic balance, biomass, and organic N production of annual ryegrass (Lolium multiflorum Lam.) were conducted. Plants grown in sand were irrigated with nutrient solution with an electrical conductivity of 2 or 11.2 dS·m-1, and N in the form of sodium nitrate (NaNO3), ammonium nitrate (NH4NO3), or ammonium sulfate [(NH4)2SO4] ranging from 0.5 to 9.0 mM. Salinity increased the concentration of total inorganic cations (C) in plants and specifically sodium (Na) by more than 3-fold higher in plants grown at high salinity as compared with plants at low salinity. Sodium (Na) concentration in roots was higher than in shoots irrespective of the salinity level, suggesting a restriction of Na transport from roots to shoots. The concentration of total inorganic anions (A) increased with salinity and when plants were supplied with nitrate (NO3), salinity increased the concentrations of NO3 and chloride (CI) in plants. Increasing salinity and N concentration in the growth medium increased organic anions concentration in plants, estimated as the difference between C and A. The effect of different N sources on C-A followed the order: NH4NO3 > NO3 > ammonium (NH4). The base of organic anions and inorganic ions with salinity contributed significantly to the osmotic potential of plants shoots and roots. Changes in C affected N and organic acids metabolism in plants, since C were highly correlated (p=0.0001) with C-A and organic N (N(org)) concentrations regardless of the salinity level or N source in the nutrient solutions. A high and positive linear dependency was found between N(org) and C-A in plants grown at high and low salinity levels and different N sources, pointing out the close relationship between N(org) and organic anions on metabolism under these conditions. The amount of biomass produced was correlated positively with organic anion concentration in plants exposed to different salinity levels. Plant biomass increased with N concentration in the nutrient solution regardless of the salinity level applied. Biomass accumulation decreased while N(org) concentration increased with salinity. Organic N content remained unaffected in plants exposed to salinity when grown in N less than 9.0 mM.
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24541
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:08
You may also be interested in
Scientific Publication
Ionic balance, biomass production, and organic nitrogen as affected by salinity and nitrogen source in annual ryegrass
20
Sagi, M., Ramat Negev Desert Agroresearch Ctr., D.N. Halutza 85515, Israel
Dovrat, A., Hebrew University of Jerusalem, Dept. Fld. Crops, Vegetables, Genet., Faculty of Agriculture, Rechovot 76100, Israel
Kipnis, T., Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan, Israel
Lips, H., Biostress Research Laboratory, Department of Life Science, Ben-Gurion University of the Negev, Sede Boqer 84993, Israel
Ionic balance, biomass production, and organic nitrogen as affected by salinity and nitrogen source in annual ryegrass
Studies on the effects of salinity and nitrogen (N) fertilization on ionic balance, biomass, and organic N production of annual ryegrass (Lolium multiflorum Lam.) were conducted. Plants grown in sand were irrigated with nutrient solution with an electrical conductivity of 2 or 11.2 dS·m-1, and N in the form of sodium nitrate (NaNO3), ammonium nitrate (NH4NO3), or ammonium sulfate [(NH4)2SO4] ranging from 0.5 to 9.0 mM. Salinity increased the concentration of total inorganic cations (C) in plants and specifically sodium (Na) by more than 3-fold higher in plants grown at high salinity as compared with plants at low salinity. Sodium (Na) concentration in roots was higher than in shoots irrespective of the salinity level, suggesting a restriction of Na transport from roots to shoots. The concentration of total inorganic anions (A) increased with salinity and when plants were supplied with nitrate (NO3), salinity increased the concentrations of NO3 and chloride (CI) in plants. Increasing salinity and N concentration in the growth medium increased organic anions concentration in plants, estimated as the difference between C and A. The effect of different N sources on C-A followed the order: NH4NO3 > NO3 > ammonium (NH4). The base of organic anions and inorganic ions with salinity contributed significantly to the osmotic potential of plants shoots and roots. Changes in C affected N and organic acids metabolism in plants, since C were highly correlated (p=0.0001) with C-A and organic N (N(org)) concentrations regardless of the salinity level or N source in the nutrient solutions. A high and positive linear dependency was found between N(org) and C-A in plants grown at high and low salinity levels and different N sources, pointing out the close relationship between N(org) and organic anions on metabolism under these conditions. The amount of biomass produced was correlated positively with organic anion concentration in plants exposed to different salinity levels. Plant biomass increased with N concentration in the nutrient solution regardless of the salinity level applied. Biomass accumulation decreased while N(org) concentration increased with salinity. Organic N content remained unaffected in plants exposed to salinity when grown in N less than 9.0 mM.
Scientific Publication
נגישות
menu      
You may also be interested in