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Microdrip irrigation of field crops: Effect on yield, water uptake, and drainage in sweet corn
Year:
2002
Authors :
Assouline, Shmuel
;
.
Cohen, Shabtai
;
.
Harodi, T.
;
.
Meerbach, D.
;
.
Rosner, Meir
;
.
Volume :
66
Co-Authors:
Assouline, S., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Cohen, S., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Meerbach, D., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Harodi, T., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Rosner, M., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
228
To page:
235
(
Total pages:
8
)
Abstract:
Microdrip irrigation supplies water at a rate close to that of plant water uptake, it is thus expected to improve yields and reduce water losses from drainage below the root zone. To test this assumption, four drip irrigation treatments were applied on corn (Zea mays L.) at Bet Dagan, Israel: (i) daily irrigation with 2 L h-1 emitters (2-D); (ii) twice-weekly irrigation with 2 L h-1 emitters (2-TW); (iii) weekly irrigation with 2 L h-1 emitters (2-W); (iv) daily microdrip irrigation with 0.25 L h-1 emitters (0.25-D). Total irrigation was similar for all treatments. Soil water content depth distribution was monitored by the neutron scattering method. Total water uptake (sap flow, SF) was measured using the heat pulse method for two consecutive periods of 2 wk. Relative drying of the 0.60- to 0.90-m soil layer was observed only in the microdrip treatment. These might indicate different root structure or water uptake patterns because of the low application rate. Highest estimated drainage fluxes were obtained for the 2-D treatment and lowest for the 0.25-D treatment, especially at the end of the growing period. The SF/ETp ratio was the steadiest for the 0.25-D treatment. The relationship of canopy conductance to vapor pressure difference for 0.25-D was not different from those of 2-D and 2-TW. Lower conductance values were obtained for 2-W at the end of the irrigation cycle. Daily irrigation led to the highest yield, while weekly irrigation led to the lowest. The results indicate that microdrip irrigation might improve yields and reduce water losses from drainage below the root zone.
Note:
Related Files :
Crops
drainage
irrigation
irrigation system
Microdrip irrigation
Soils
Water uptake
Zea mays
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More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29381
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:46
You may also be interested in
Scientific Publication
Microdrip irrigation of field crops: Effect on yield, water uptake, and drainage in sweet corn
66
Assouline, S., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Cohen, S., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Meerbach, D., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Harodi, T., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Rosner, M., Dept. of Environmental Physics, Institute of Soil, Volcani Center, Bet Dagan 50250, Israel
Microdrip irrigation of field crops: Effect on yield, water uptake, and drainage in sweet corn
Microdrip irrigation supplies water at a rate close to that of plant water uptake, it is thus expected to improve yields and reduce water losses from drainage below the root zone. To test this assumption, four drip irrigation treatments were applied on corn (Zea mays L.) at Bet Dagan, Israel: (i) daily irrigation with 2 L h-1 emitters (2-D); (ii) twice-weekly irrigation with 2 L h-1 emitters (2-TW); (iii) weekly irrigation with 2 L h-1 emitters (2-W); (iv) daily microdrip irrigation with 0.25 L h-1 emitters (0.25-D). Total irrigation was similar for all treatments. Soil water content depth distribution was monitored by the neutron scattering method. Total water uptake (sap flow, SF) was measured using the heat pulse method for two consecutive periods of 2 wk. Relative drying of the 0.60- to 0.90-m soil layer was observed only in the microdrip treatment. These might indicate different root structure or water uptake patterns because of the low application rate. Highest estimated drainage fluxes were obtained for the 2-D treatment and lowest for the 0.25-D treatment, especially at the end of the growing period. The SF/ETp ratio was the steadiest for the 0.25-D treatment. The relationship of canopy conductance to vapor pressure difference for 0.25-D was not different from those of 2-D and 2-TW. Lower conductance values were obtained for 2-W at the end of the irrigation cycle. Daily irrigation led to the highest yield, while weekly irrigation led to the lowest. The results indicate that microdrip irrigation might improve yields and reduce water losses from drainage below the root zone.
Scientific Publication
You may also be interested in