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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Assessment of various control strategies for recirculation of greenhouse effluents under semi-arid conditions
Year:
1998
Authors :
מדינה, שלומית
;
.
קרסנובסקי, ארקדי
;
.
ראובני, ראובן
;
.
רביב, מיכאל
;
.
Volume :
73
Co-Authors:
Raviv, M., Dept. of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar Research Center, P.O.B. 1021, Ramat Yishay 30095, Israel
Krasnovsky, A., Dept. of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar Research Center, P.O.B. 1021, Ramat Yishay 30095, Israel
Medina, S., Dept. of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar Research Center, P.O.B. 1021, Ramat Yishay 30095, Israel
Reuveni, R., Dept. of Plant Pathology, Agricultural Research Organization, Newe Ya'ar Research Center, P.O.B. 1021, Ramat Yishay 30095, Israel
Facilitators :
From page:
485
To page:
491
(
Total pages:
7
)
Abstract:
Rose plants (cv. Mercedes) were planted in tuff as soilless medium during April 1993. Recirculation of drainage water (DrW) was started in December 1993. Since then, three strategies were tested versus non-recirculated controls: a) Electrical conductivity (EC) of irrigation water of all treatments and the control was identical. This was achieved diluting the recycled solution with various proportions of tap and collected rain water. As a first approximation, DrW were considered as containing full strength nutritional solution. As a result, the concentration (conc.) of applied nutrients was somewhat lower in the recirculation treatments than in the control. No DrW discharge was done. b) All treatments received a quantity of fertilizer solution identical to that of the control, regardless of the contribution of nutrients from the DrW. As a result, the conc. of K and N was considerably higher in the recirculation treatments than in the control. DrW was discharged whenever their EC passed prescribed values (3.0, 3.5, 4.0 or 4.5 dS m-1). c) Irrigation was controlled according to prescribed EC values of 2.0 (control), 2.5, 3.0 and 3.5 dS m-1 (recirculation treatments) using maximum possible amount of DrW. Excess DrW was discharged. The conc. of the fertilization solution was adjusted so that phosphate conc. in the DrW was similar to that of the control. The potential savings of water and fertilizers and the reduction in environmental pollution are described. No negative effect of DrW recycling on crop yield (quantity and quality) was found. Frequent monitoring revealed no proliferation of pathogenic microorganisms.
Note:
Related Files :
drainage water
effluent
electric conductivity
fertilizer
greenhouse
irrigation
recirculation
recycling
Rose
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22151
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:49
Scientific Publication
Assessment of various control strategies for recirculation of greenhouse effluents under semi-arid conditions
73
Raviv, M., Dept. of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar Research Center, P.O.B. 1021, Ramat Yishay 30095, Israel
Krasnovsky, A., Dept. of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar Research Center, P.O.B. 1021, Ramat Yishay 30095, Israel
Medina, S., Dept. of Ornamental Horticulture, Agricultural Research Organization, Newe Ya'ar Research Center, P.O.B. 1021, Ramat Yishay 30095, Israel
Reuveni, R., Dept. of Plant Pathology, Agricultural Research Organization, Newe Ya'ar Research Center, P.O.B. 1021, Ramat Yishay 30095, Israel
Assessment of various control strategies for recirculation of greenhouse effluents under semi-arid conditions
Rose plants (cv. Mercedes) were planted in tuff as soilless medium during April 1993. Recirculation of drainage water (DrW) was started in December 1993. Since then, three strategies were tested versus non-recirculated controls: a) Electrical conductivity (EC) of irrigation water of all treatments and the control was identical. This was achieved diluting the recycled solution with various proportions of tap and collected rain water. As a first approximation, DrW were considered as containing full strength nutritional solution. As a result, the concentration (conc.) of applied nutrients was somewhat lower in the recirculation treatments than in the control. No DrW discharge was done. b) All treatments received a quantity of fertilizer solution identical to that of the control, regardless of the contribution of nutrients from the DrW. As a result, the conc. of K and N was considerably higher in the recirculation treatments than in the control. DrW was discharged whenever their EC passed prescribed values (3.0, 3.5, 4.0 or 4.5 dS m-1). c) Irrigation was controlled according to prescribed EC values of 2.0 (control), 2.5, 3.0 and 3.5 dS m-1 (recirculation treatments) using maximum possible amount of DrW. Excess DrW was discharged. The conc. of the fertilization solution was adjusted so that phosphate conc. in the DrW was similar to that of the control. The potential savings of water and fertilizers and the reduction in environmental pollution are described. No negative effect of DrW recycling on crop yield (quantity and quality) was found. Frequent monitoring revealed no proliferation of pathogenic microorganisms.
Scientific Publication
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