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קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
High irrigation frequency: The effect on plant growth and on uptake of water and nutrients
Year:
2003
Source of publication :
Acta Horticulturae
Authors :
זילבר, אבנר
;
.
Volume :
627
Co-Authors:
Silber, A., Agricultural Research Organization, Volcani Center, Institute of Soils, Water and Environmental Sciences, P.O. Box 6, Bet Dagan, 50250, Israel
Xu, G., College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
Wallach, R., Faculty of Agricultural Food and Environmental Quality Sciences, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Facilitators :
From page:
89
To page:
96
(
Total pages:
8
)
Abstract:
The objective of the present research was to explore the effects of frequent irrigation and fertilization on the uptake of water and nutrients by lettuce and bell pepper plants. The daily fertigation frequency induced a significant increase in yield, especially at low nutritional levels. Yield improvement was primarily related to enhanced uptake of nutrients, especially P. It was suggested that the reduced yield obtained at low frequency resulted from deficiency of nutrients rather than of water, and that high irrigation frequency could compensate for nutrient deficiency. Consequently, an increase in fertigation frequency enables the concentrations of immobile elements such as P, K and trace metals in irrigation water to be reduced, so reducing environmental pollution. The main two mechanisms involved were the frequent replenishment of nutrients in the depletion zone near the root surface and the enhancement of mass flow transport. However, modification of the NH 4/NO3 ratio is recommended while the irrigation frequency is increased because of NH4 toxicity. Time-dependent processes such as nitrification reduce the temporal NH4 concentrations in the rhizosphere and hence, the actual NH4concentrations increase as the time interval between consecutive fertigations is reduced. Adjustment of the NH4/NO3 ratio at high irrigation frequencies is recommended, in order to diminish the risks of NH4 toxicity in sensitive crops.
Note:
Related Files :
fertigation
hydraulic conductivity
Nutrient acquisition
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
27803
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:34
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Scientific Publication
High irrigation frequency: The effect on plant growth and on uptake of water and nutrients
627
Silber, A., Agricultural Research Organization, Volcani Center, Institute of Soils, Water and Environmental Sciences, P.O. Box 6, Bet Dagan, 50250, Israel
Xu, G., College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
Wallach, R., Faculty of Agricultural Food and Environmental Quality Sciences, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
High irrigation frequency: The effect on plant growth and on uptake of water and nutrients
The objective of the present research was to explore the effects of frequent irrigation and fertilization on the uptake of water and nutrients by lettuce and bell pepper plants. The daily fertigation frequency induced a significant increase in yield, especially at low nutritional levels. Yield improvement was primarily related to enhanced uptake of nutrients, especially P. It was suggested that the reduced yield obtained at low frequency resulted from deficiency of nutrients rather than of water, and that high irrigation frequency could compensate for nutrient deficiency. Consequently, an increase in fertigation frequency enables the concentrations of immobile elements such as P, K and trace metals in irrigation water to be reduced, so reducing environmental pollution. The main two mechanisms involved were the frequent replenishment of nutrients in the depletion zone near the root surface and the enhancement of mass flow transport. However, modification of the NH 4/NO3 ratio is recommended while the irrigation frequency is increased because of NH4 toxicity. Time-dependent processes such as nitrification reduce the temporal NH4 concentrations in the rhizosphere and hence, the actual NH4concentrations increase as the time interval between consecutive fertigations is reduced. Adjustment of the NH4/NO3 ratio at high irrigation frequencies is recommended, in order to diminish the risks of NH4 toxicity in sensitive crops.
Scientific Publication
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