Effect of evapotranspiration underprediction on irrigation scheduling and yield of corn: a simulation study

Stöckle, Claudio O.; James, L. G.; Bassett, D. L.; Saxton, K. E.

doi:10.1016/0378-3774(91)90006-5

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Rice yield per unit evapotranspiration (WP ET ) varies widely, from 0.5 to 1.6 g kg *1 . Wide variation in WP ET also occurs in other crops and is due to differences in crop management which may affect crop yield and/or ET, such as soil nutrient, plant spacing, and planting time (Turner, Stockle et al (1990) USA † Numbers in parentheses are water ratio of evapotranspiration to inflow water. When this ration is greater than 1, crops could use water stored in the root zone.…”

Section: Water Balance Components During Crop Growth Periodmentioning

confidence: 99%

Productive Water Use in Rice Production

Tuong

2000

Journal of Crop Production

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Section: Water Balance Components During Crop Growth Periodmentioning

confidence: 99%

Productive Water Use in Rice Production

Tuong

2000

Journal of Crop Production

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Rice production in water-scarce environments.

Tuong

Bouman²

2003

Water Productivity in Agriculture: Limits and Opportunities for Improvement

367

233

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Rice production in Asia needs to increase to feed a growing population. Though a complete assessment of the level of water scarcity in Asian rice production is still lacking, there are signs that declining quality of water and declining availability of water resources are threatening the sustainability of the irrigated rice-based production system. Drought is one of the main constraints for high yield in rain-fed rice. Exploring ways to produce more rice with less water is essential for food security and sustaining environmental health in Asia. This chapter reviews the International Rice Research Institute (IRRI)'s integrated approach, using genetics, breeding and integrated resource management to increase rice yield and to reduce water demand for rice production. Water-saving irrigation, such as saturated-soil culture and alternate wetting and drying, can drastically cut down the unproductive water outflows and increase water productivity. However, these technologies mostly lead to some yield decline in the current lowland rice varieties. Other new approaches are being researched to increase water productivity without sacrifice in yield. These include the incorporation of the C 4 photosynthetic pathway into rice to increase rice yield per unit water transpired, the use of molecular biotechnology to enhance drought-stress tolerance and the development of 'aerobic rice', to achieve high and sustainable yields in non-flooded soil. Through the adoption of water-saving irrigation technologies, rice land will shift away from being continuously anaerobic to being partly or even completely aerobic. These shifts will have profound changes in water conservation, soil organic-matter turnover, nutrient dynamics, carbon sequestration, soil productivity, weed ecology and greenhouse-gas emissions. Whereas some of these changes can be perceived as positive, e.g. water conservation and decreased methane emission, some are perceived as negative, e.g. release of nitrous oxide from the soil and decline in soil organic matter. The challenge will be to develop effective integrated natural-resource-management interventions, which allow profitable rice cultivation with increased soil aeration, while maintaining the productivity, environmental services and sustainability of rice-based ecosystems.

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Estandarización de las ecuaciones para estimar la evapotranspiración del cultivo de referencia

Mundo-Molina

2009

IIT

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Resumen En este trabajo se presenta una discu sión sobre la nece sidad de estan da rizar las ecuaciones para estimar la evapo trans pi ra ción del cultivo de refe rencia (ETo), con el objeto de disponer de una fórmula que permita estimar dicha variable de manera precisa, con una ecua ción estan da ri zada tipo Penman-Monteith. Por tal razón, se realiza un análisis compa ra tivo de los métodos más precisos para estimar la ETo en algunas zonas agrí colas de México, con el afán de impulsar y promover que asociaciones, insti tu ciones, técnicos, profe sio nales, inves ti ga dores del tema y compa ñías provee doras de equipos utilicen ecua ciones de Penman-Monteith estan da ri zadas para estimar ETo con fines de apli ca ción o inves ti ga ción en aque llas zonas en donde sea factible hacerlo. Se selec cionó la esta ción clima to ló gica auto ma ti zada CIANO (27 º 22' 14 latitud Norte y 109 º 55' 4 longitud Oeste), empla zada en la manzana 910, lote 3, del valle del Yaqui, situada a 37 metros sobre el nivel del mar, con la cual se realizaron compa ra ciones en la esti ma ción de ETo con las siguientes ecua ciones: Penman-Monteith ASCE (PMA), Penman-Monteith FAO 56 (PM FAO 56), Penman-Monteith estan da ri zado ASCE (PM Std. ASCE) y la esta ción auto ma ti zada CIANO, que utiliza una versión deno mi nada Penman-Monteith Camp bell-Scien tific (Est. Aut). De acuerdo a los resul tados obte nidos, se obser varon dife ren cias impor tantes en la estima ción de ETo entre los métodos patrón (PMA) y la esta ción auto ma ti zada CIANO, atri buidas en este caso a la no estan da ri za ción de la ecua ción que emplea ésta última. El coefi ciente de corre la ción entre ambos métodos fue de 0.92, con una desvia ción estándar de 1.63 mm, un error cuadrá tico medio de 0.60 mm y una eficiencia en la esti ma ción de ETo respecto al método patrón del 87%. Al igual que la esta ción CIANO se reali zaron tres compa ra ciones más, en tres estaciones distintas loca lizadas en el Valle del Yaqui con idén ticos resul tados. Descrip tores: Evapo trans pi ra ción del cultivo de refe rencia, ecua ción de Penman-Monteith, esta ción clima to ló gica auto ma ti zada, riego, ciclo hidro ló gico.

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Effect of evapotranspiration underprediction on irrigation scheduling and yield of corn: a simulation study

Cited by 3 publications

References 6 publications

Productive Water Use in Rice Production

Productive Water Use in Rice Production

Rice production in water-scarce environments.

Estandarización de las ecuaciones para estimar la evapotranspiración del cultivo de referencia

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