Water Balance of a Seed Onion Field<sup>1</sup>

Goltz, S. M.; Tanner, C. B.; Millar, Agustín A.; Lang, A. R.

doi:10.2134/agronj1971.00021962006300050031x

Cited by 10 publications

(15 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The sensitivity of onion growth and yield to soil water stress has been well documented (Goltz et al, 1971;Hegde, 1986;Kruse et al, 1987;Miller et al, 1971;Shock et al, 1998). Results of the present study indicate that straw application to irrigation furrows can substantially improve onion yield.…”

Section: Discussionmentioning

confidence: 97%

“…We attributed yield improvements to decreased water runoff and increased lateral water movement and soil moisture. O nion growth is very sensitive to water stress (Goltz et al, 1971;Miller et al, 1971), and the crop is commonly furrow irrigated in the western United States (Ells et al, 1986). In a recent study in eastern Oregon, yield of the onion cultivar 'Great Scott' decreased when soil water potential at 8 inches (20 cm) depth decreased below -0.2 bar (-20 kPa) (Shock et al, 1998).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Improving Onion Yield and Market Grade by Mechanical Straw Application to Irrigation Furrows

Shock¹,

Jensen²,

Hobson³

et al. 1999

horttech

View full text Add to dashboard Cite

Onion (Allium cepa var. cepa L.) is extensively grown under furrow irrigation in the western United States. Wheel compaction of furrows increases water runoff and erosion, and can lead to poor lateral water movement and reduced yields. We studied the effects of 560 to 800 lb/acre (630 to 900 kg·ha-1) wheat straw mechanically applied to the bottom of irrigation furrows on yield and bulb size of sweet Spanish onions in commercial onion fields in 1988, 1990, and 1991, and at an experiment station in 1991 and 1995. Furrows in commercial fields were either compacted with tractor wheels or not. In the commercial fields, straw application increased onion yield in plots with compacted furrows in 1988 and in all plots (with or without compacted furrows) in 1990. At the experiment station, straw mulch increased onion yield 64% in 1991, and 74% in 1995. Straw application primarily increased yields of jumbo (3 to 4 inches; 76 to 102 mm) and colossal (>4 inches; 10 cm) onions, whereas there was no effect on medium (2.25 to 3 inches; 57 to 76 mm) onions. We attributed yield improvements to decreased water runoff and increased lateral water movement and soil moisture.

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

Improving Onion Yield and Market Grade by Mechanical Straw Application to Irrigation Furrows

Shock¹,

Jensen²,

Hobson³

et al. 1999

horttech

View full text Add to dashboard Cite

show abstract

“…Soil water potential was determined with tensiorneters connected to pressure transducers, and soil water content by gravimetric sampling, and neutron probe (Nuclear Chicago) readings. Transpiration rates were obtained by both a combination method and a mass transfer method (Goltz et a!., 1971).…”

mentioning

confidence: 99%

Internal Water Status and Water Transport in Seed Onion Plants¹

Millar¹,

Gardner²,

Goltz

1971

Agronomy Journal

Self Cite

View full text Add to dashboard Cite

Water potential, transpiration rate, and stomatal resistance of the various parts of the onion (Allium cepa L.) plant were measured under field and controlled conditions. Water potentials of florets and pedicels were always lower than leaf water potentials. Water potential difference between the florets and the soil of as much as —9 bars were found. The greatest drop in water potential was found between the flowers and the upper part of the seed stalk. These differences in water potential were found even when plants were growing in soil well supplied with water. Transpiration rates of the leaves were the greatest of all plant parts, the seed stalk next (about 15 to 20% of the flux density from the leaves), and the umbel lowest, representing a very small fraction of the total. Stomatal resistance of the leaves was at all times lower than seed stalk stomatal resistances. An almost on‐off stomatal behavior by which the onion plant regulates its transpiration was found to operate in a narrow range of leaf water potential, —3 to —7 bars. The relation between flux density and water potential drop was found to be highly nonlinear in plants growing in different soils and under a wide range of soil water potential and environmental conditions. Impedance to water flow in the seed stalk was 5 to 8 times greater than in the leaves. For the same conditions potential drop between soil and root surface was less than 5 cm of water.

show abstract

“…GOLTZ et al (1971) constataram ser elevada a resistência oferecida pela planta de cebola à passagem da água, devido à pequena área transpirante e à alta resistência dos estômatos. De acordo com estes autores, apenas cerca de 20 por cento da evapotranspiração são devidos à transpiração.…”

Section: Resultados ε Discussãounclassified

“…Avaliando o fator água na cultura, GOLTZ et al (1971) constataram que a transpiração é responsável por cerca de 20 por cento da evapotranspiração, considerando-se υ ciclo total, afetando apenas levemente a evaporação de um solo nu. Estes autores verificaram ainda que a ER teve valores diários variando de 1,41 a 2,63 mm, dos quais 0,20 a 0,68 mm correspondiam a transpiração; esta baixa contribuição da cultura é devida a pequena área transpirante e à alta resistência dos estômatos (cerca de cinco vezes à do fcijoeiro).…”

Section: Introductionunclassified

Uso do tanque "classe A" para a avaliação da evapotranspiração de uma cultura de cebola

Klar¹,

Filho

Simão

1975

An. Esc. Super. Agric. Luiz de Queiroz

View full text Add to dashboard Cite

RESUMONa cultura de cebola, a irrigação racional, baseada na caracterização dinâmica do sistema solo-água-planta-atmosfera, se relaciona estreitamente com a maximização no rendimento agrícola.Avaliam-se aqui as necessidades hídricas da cultura, cultivar "Baia Periforme Precoce" com propagação por mudas, mantida sob irrigação por sulcos de infiltração e condições específicas de solo e clima, através do emprego do tanque "Classe A" de evaporação. Com base no delinea¬ mento experimental de quatro tratamentos de potenciais mínimos de umidade do solo, os resultados, analisados c discutidos, permitem conclusões à respeito das condições que favorecem as plantas para a produção máxima de bulbos. INTRODUÇÃONa cultura da cebola, a prática da irrigação, corretamente conduzida, é um dos fatores fundamentais vinculados à maximização no rendimento agrícola, a qual se relaciona estreitamente com a disponibilidade de água à cultura. Estudos já desenvolvidos nesse sentido mostram que na irrigação exercem influência os fatores relacionados à natureza do solo e às condições climáticas, além da própria planta; tais fatores integram entre si, tendo como resultante a produtividade.Variações nas condições meteorológicas produzem diferentes demandas evaporati¬ vas, que somadas aos potenciais hídricos do solo, interferem no balanço de água da planta e, por conseguinte, no seu desenvolvimento.A demanda evaporativa da atmosfera ou evapotranspiração potencial (ΈΡ) pode ser estimada através de diversos métodos (KLAR, 1974) e pode ser definida como: "a perda máxima de água, na fase gasosa, para uma unidade de tempo, de uma cobertura vegetal abundante, uniforme, de baixa altura, em fase de crescimento ativo, cobrindo totalmente uma extensa superfície e sem deficit de água" (STANH1LL, 1965). MONTENY (1972) acrescenta que a EP deve ser estimada através de um conjunto de espécies vegetais suscetíveis de se desenvolverem em determinada região, ou seja, com espécies bem * Entregue para publicação em 25/04/1975.

show abstract

Water Balance of a Seed Onion Field¹

Cited by 10 publications

References 3 publications

Improving Onion Yield and Market Grade by Mechanical Straw Application to Irrigation Furrows

Improving Onion Yield and Market Grade by Mechanical Straw Application to Irrigation Furrows

Internal Water Status and Water Transport in Seed Onion Plants¹

Uso do tanque "classe A" para a avaliação da evapotranspiração de uma cultura de cebola

Contact Info

Product

Resources

About

Water Balance of a Seed Onion Field1

Cited by 10 publications

References 3 publications

Improving Onion Yield and Market Grade by Mechanical Straw Application to Irrigation Furrows

Improving Onion Yield and Market Grade by Mechanical Straw Application to Irrigation Furrows

Internal Water Status and Water Transport in Seed Onion Plants1

Uso do tanque "classe A" para a avaliação da evapotranspiração de uma cultura de cebola

Contact Info

Product

Resources

About

Water Balance of a Seed Onion Field¹

Internal Water Status and Water Transport in Seed Onion Plants¹