Simulating yield response to water of Teff (Eragrostis tef) with FAO's AquaCrop model

A. Araya, S.D. Keesstra, L. Stroosnijder

Research output: Contribution to journalArticleAcademicpeer-review

55 Citations (Scopus)

Abstract

In a semi-arid environment, the main challenge for crop production is water deficit. FAO's AquaCrop model, which simulates yield response to water, has been calibrated to explore alternative water management strategies in teff crop. To calibrate and evaluate this model, we used independent data sets of the cropping season 2008 and 2009 in the northern Ethiopia. The teff crop cover, biomass and soil water simulated by the model agreed well with the observed data. The model revealed that the grain-water use efficiency of teff increased when supplementary irrigation after start of flowering was increased from 0 to 95 mm. The biomass-water use efficiency showed the opposite trend: it decreased. The implication of these results is that if land is not a constraint, and if the intention is to grow teff for its biomass, the best option is to use the available water to grow teff with deficit irrigation. But when the major intention is to produce grain, the best option is an optimum irrigation application. It is concluded that the AquaCrop model can be used to explore management options to improve teff water productivity in the area
Original languageEnglish
Pages (from-to)196-204
JournalField Crops Research
Volume116
Issue number1-2
DOIs
Publication statusPublished - 2010

Fingerprint

Eragrostis tef
yield response
Food and Agricultural Organization
irrigation
water use efficiency
water
biomass
cover crop
arid environment
crop production
deficit irrigation
dry environmental conditions
flowering
cropping practice
water management
cover crops
Ethiopia
soil water
productivity
crop

Keywords

  • use efficiency
  • supplemental irrigation
  • drought stress
  • crop yield
  • systems
  • productivity
  • environment
  • management
  • evapotranspiration
  • improvement

Cite this

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title = "Simulating yield response to water of Teff (Eragrostis tef) with FAO's AquaCrop model",
abstract = "In a semi-arid environment, the main challenge for crop production is water deficit. FAO's AquaCrop model, which simulates yield response to water, has been calibrated to explore alternative water management strategies in teff crop. To calibrate and evaluate this model, we used independent data sets of the cropping season 2008 and 2009 in the northern Ethiopia. The teff crop cover, biomass and soil water simulated by the model agreed well with the observed data. The model revealed that the grain-water use efficiency of teff increased when supplementary irrigation after start of flowering was increased from 0 to 95 mm. The biomass-water use efficiency showed the opposite trend: it decreased. The implication of these results is that if land is not a constraint, and if the intention is to grow teff for its biomass, the best option is to use the available water to grow teff with deficit irrigation. But when the major intention is to produce grain, the best option is an optimum irrigation application. It is concluded that the AquaCrop model can be used to explore management options to improve teff water productivity in the area",
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Simulating yield response to water of Teff (Eragrostis tef) with FAO's AquaCrop model. / Araya, A.; Keesstra, S.D.; Stroosnijder, L.

In: Field Crops Research, Vol. 116, No. 1-2, 2010, p. 196-204.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Simulating yield response to water of Teff (Eragrostis tef) with FAO's AquaCrop model

AU - Araya, A.

AU - Keesstra, S.D.

AU - Stroosnijder, L.

PY - 2010

Y1 - 2010

N2 - In a semi-arid environment, the main challenge for crop production is water deficit. FAO's AquaCrop model, which simulates yield response to water, has been calibrated to explore alternative water management strategies in teff crop. To calibrate and evaluate this model, we used independent data sets of the cropping season 2008 and 2009 in the northern Ethiopia. The teff crop cover, biomass and soil water simulated by the model agreed well with the observed data. The model revealed that the grain-water use efficiency of teff increased when supplementary irrigation after start of flowering was increased from 0 to 95 mm. The biomass-water use efficiency showed the opposite trend: it decreased. The implication of these results is that if land is not a constraint, and if the intention is to grow teff for its biomass, the best option is to use the available water to grow teff with deficit irrigation. But when the major intention is to produce grain, the best option is an optimum irrigation application. It is concluded that the AquaCrop model can be used to explore management options to improve teff water productivity in the area

AB - In a semi-arid environment, the main challenge for crop production is water deficit. FAO's AquaCrop model, which simulates yield response to water, has been calibrated to explore alternative water management strategies in teff crop. To calibrate and evaluate this model, we used independent data sets of the cropping season 2008 and 2009 in the northern Ethiopia. The teff crop cover, biomass and soil water simulated by the model agreed well with the observed data. The model revealed that the grain-water use efficiency of teff increased when supplementary irrigation after start of flowering was increased from 0 to 95 mm. The biomass-water use efficiency showed the opposite trend: it decreased. The implication of these results is that if land is not a constraint, and if the intention is to grow teff for its biomass, the best option is to use the available water to grow teff with deficit irrigation. But when the major intention is to produce grain, the best option is an optimum irrigation application. It is concluded that the AquaCrop model can be used to explore management options to improve teff water productivity in the area

KW - use efficiency

KW - supplemental irrigation

KW - drought stress

KW - crop yield

KW - systems

KW - productivity

KW - environment

KW - management

KW - evapotranspiration

KW - improvement

U2 - 10.1016/j.fcr.2009.12.010

DO - 10.1016/j.fcr.2009.12.010

M3 - Article

VL - 116

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EP - 204

JO - Field Crops Research

JF - Field Crops Research

SN - 0378-4290

IS - 1-2

ER -