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פותח על ידי קלירמאש פתרונות בע"מ -
High irrigation frequency and transient NH4 concentration: Effects on soilless-grown bell pepper
Year:
2005
Authors :
אסולין, שמואל
;
.
זילבר, אבנר
;
.
כהן, שבתאי
;
.
Volume :
80
Co-Authors:
Silber, A., Inst. Soils, Water and Environ. Sci., Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Bruner, M., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Kenig, E., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Reshef, G., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Zohar, H., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Posalski, I., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Yehezkel, H., Besor Experimental Station, P.O. Box 4, Negev 85400, Israel
Cohen, S., Besor Experimental Station, P.O. Box 4, Negev 85400, Israel
Dinar, M., Besor Experimental Station, P.O. Box 4, Negev 85400, Israel
Assouline, S., Inst. Soils, Water and Environ. Sci., Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
233
To page:
239
(
Total pages:
7
)
Abstract:
The effects of irrigation frequency, N concentration, and NH 4-N/NO3-N ratio on rhizosphere NH4 concentrations and plant yield were investigated for bell pepper (Capsicum annuum L., cv. 'Mazurka') grown in perlite. The experiment comprised eight treatments, with two concentrations of N (120 or 60 mg l-1), two NH4-N/NO3-N ratios (3:7 and 1:9), and two irrigation frequencies (3 d-1, or for 1.5 min every 30 min throughout the day). The combination of high NH4 concentration in the irrigation water and high irrigation frequency reduced yield significantly. Decreasing the NH 4 concentration by decreasing the NH4-NTNO3-N ratio, or by decreasing the total N concentration, improved yield. The impaired growth of plants exposed to high irrigation frequency and high NH4 concentrations was a result of high transient NH4 concentrations in the rhizosphere. Time-dependent processes, such as nitrification, reduced transient NH4 concentrations in the rhizosphere and, therefore, actual NH4 concentrations were lower under low-frequency irrigation. Modification of the NH4/NO3 ratio under high frequencies of irrigation is recommended to diminish the risks of NH4 toxicity in sensitive crops.
Note:
Related Files :
Capsicum annuum
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
30321
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:53
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Scientific Publication
High irrigation frequency and transient NH4 concentration: Effects on soilless-grown bell pepper
80
Silber, A., Inst. Soils, Water and Environ. Sci., Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Bruner, M., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Kenig, E., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Reshef, G., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Zohar, H., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Posalski, I., Shaham, Extension Service, Ministry of Agriculture, P.O. Box 28, Bet Dagan 50250, Israel
Yehezkel, H., Besor Experimental Station, P.O. Box 4, Negev 85400, Israel
Cohen, S., Besor Experimental Station, P.O. Box 4, Negev 85400, Israel
Dinar, M., Besor Experimental Station, P.O. Box 4, Negev 85400, Israel
Assouline, S., Inst. Soils, Water and Environ. Sci., Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
High irrigation frequency and transient NH4 concentration: Effects on soilless-grown bell pepper
The effects of irrigation frequency, N concentration, and NH 4-N/NO3-N ratio on rhizosphere NH4 concentrations and plant yield were investigated for bell pepper (Capsicum annuum L., cv. 'Mazurka') grown in perlite. The experiment comprised eight treatments, with two concentrations of N (120 or 60 mg l-1), two NH4-N/NO3-N ratios (3:7 and 1:9), and two irrigation frequencies (3 d-1, or for 1.5 min every 30 min throughout the day). The combination of high NH4 concentration in the irrigation water and high irrigation frequency reduced yield significantly. Decreasing the NH 4 concentration by decreasing the NH4-NTNO3-N ratio, or by decreasing the total N concentration, improved yield. The impaired growth of plants exposed to high irrigation frequency and high NH4 concentrations was a result of high transient NH4 concentrations in the rhizosphere. Time-dependent processes, such as nitrification, reduced transient NH4 concentrations in the rhizosphere and, therefore, actual NH4 concentrations were lower under low-frequency irrigation. Modification of the NH4/NO3 ratio under high frequencies of irrigation is recommended to diminish the risks of NH4 toxicity in sensitive crops.
Scientific Publication
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