The effect of irrigation on the length, weight, and diameter of lettuce roots

Rowse, H. R.

doi:10.1007/bf00011520

Cited by 38 publications

(19 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In SI, water was applied every 15 days; in FI, every 30 days. More frequent irrigation is known to lead to a shallower root system (Merrill and Rawlins, 1979; Proffitt et al ., 1985), whereas water deficit or water stress in the surface layer results in a larger proportion of deep roots (Rowse, 1974; Asseng et al ., 1998; Benjamin and Nielsen, 2006). Thus, the major zone for uptake of nutrients was concentrated near the soil surface in SI, as has been shown for alfalfa (Bai and Li, 2003).…”

Section: Resultsmentioning

confidence: 99%

Nutrient Distribution, Growth, and Water Use Efficiency in Maize Following Winter Wheat Irrigated by Sprinklers or Surface Irrigation

Kang

et al. 2010

Irrigation and Drainage

View full text Add to dashboard Cite

The pattern of distribution of nutrients in maize varied with the method of irrigation used for winter wheat. The major nutrient uptake zone was concentrated closer to the soil surface in fields irrigated with sprinklers than in surface-irrigated fields, especially in dry years, which lowered the amounts of available soil N and P. Maximum values for plant height, leaf area index, and grain yield were significantly higher (P < 0.05) in surface-irrigated fields when water was supplied in large quantity. When supplied in small quantity, the difference between the irrigation methods was reduced because of the wet and rainy weather during the growing season of winter wheat. The amount of water held in the soil profile was greater, and deep percolation minimal, in sprinkler-irrigated fields, which could lower the amount of soil N lost from leaching. Water use efficiency (WUE) was higher in surface-irrigated fields. These observations suggest that to maximize grain yield of winter wheat and maize, fertilizer application to maize in sprinkler-irrigated fields should change correspondingly. The management of the succeeding crop should thus reflect the irrigation method used for the preceding crop in order to obtain the highest yield. Copyright # 2010 John Wiley & Sons, Ltd. RÉ SUMÉDans ce papier, on a fait varier le schéma de répartition des nutriments dans le maïs en fonction de la méthode d'irrigation utilisée pour le blé d'hiver. La zone d'absorption des éléments nutritifs était beaucoup plus concentrée près de la surface du sol dans des champs irrigués par aspersion que dans les champs en irrigation de surface, surtout en année sèche. Ceci a réduit les quantités de N et P disponibles. Les valeurs maximales pour la hauteur des plantes, l'indice de superficie foliaire, et le rendement en grain ont été significativement plus élevés (P < 0.05) dans les champs en irrigation de surface, quand l'eau a été fournie en grande quantité. Lorsqu'elle est fournie en petite quantité, la différence entre les méthodes d'irrigation a été réduite du fait du temps humide et pluvieux pendant la saison de culture du blé d'hiver. Dans les champs irrigués par aspersion, la quantité d'eau contenue dans le profil du sol était plus grande, et la percolation en profondeur minimale, ce qui pourrait réduire la quantité de sol N perdu par lixiviation. L'efficacité de l'utilisation de l'eau (EUE) a été supérieure pour les champs en irrigation de surface. Ces observations suggèrent que, pour maximiser le rendement en grain du blé d'hiver et du maïs, l'épandage d'engrais pour le maïs en irrigation par aspersion devrait être adapté. La gestion de la culture suivante doit donc refléter la méthode d'irrigation utilisée pour la récolte précédente, afin d'obtenir le meilleur rendement. Copyright # 2010 John Wiley & Sons, Ltd.

show abstract

Section: Resultsmentioning

confidence: 99%

Nutrient Distribution, Growth, and Water Use Efficiency in Maize Following Winter Wheat Irrigated by Sprinklers or Surface Irrigation

Kang

et al. 2010

Irrigation and Drainage

View full text Add to dashboard Cite

show abstract

“…Segundo FILGUEIRA (1982), dentre as hortaliças, a alface possui grande importância, pois constitui-se em uma das mais ricas fontes de minerais e de celulose, sendo, contudo, uma cultura que necessita de quantidade de água relativamente grande para que ocorra sua formação (ROWSE, 1974). Irrigação da ordem de 80% de água disponível no solo apresenta melhor desempenho para o desenvolvimento e produção dessa cultura, segundo DEMATTÊ & MORETTI FILHO (1981).…”

Section: Introductionunclassified

Reúso de águas residuárias da piscicultura e da suinocultura na irrigação da cultura da alface

Baumgartner

Sampaio

Silva³

et al. 2007

Eng. Agríc.

View full text Add to dashboard Cite

RESUMO:Este trabalho teve o objetivo de avaliar o desenvolvimento, a produção e a qualidade sanitária da cultura da alface irrigada com águas residuárias originadas da suinocultura e da piscicultura. Os tratamentos avaliados foram: T1 -alface irrigada com água de origem subterrânea e adubação suplementar; T2 -alface irrigada com água residuária de viveiro de peixes alimentados com ração; T3 -alface irrigada com água residuária originária de lagoa de estabilização de dejetos de suínos, e T4 -água de lagoa de cultivo de algas, alimentada com resíduo de biodigestor de dejeto de suíno. Os tratamentos não apresentaram diferenças significativas para altura da alface, diâmetro da cabeça, comprimento da raiz, massa da raiz, massa total da planta, massa fresca e massa seca; os tratamentos T4 e T2 apresentaram os maiores valores para comprimento da maior folha e número de folhas, respectivamente; em geral, as análises foliares e a extração de macro e micronutrientes pela cultura não apresentaram diferenças significativas; ocorreu contaminação de coliformes fecais e totais em todos os tratamentos; não ocorreu contaminação de Escherichia coli em todos os tratamentos; todos os Coeficientes de Uniformidade de Christiansen (CUC) encontrados foram acima de 85%, exceto para o tratamento T3 que foi de 74,05%; ocorreram alterações químicas no solo proporcionais às características das águas utilizadas nos respectivos tratamentos. PALAVRAS-CHAVE: efluente, irrigação, Lactuca sativa L. REUSE OF WASTEWATER FROM SWINE AND FISH ACTIVITIES IN THE LETTUCE CULTUREABSTRACT: The objective of this work was to evaluate development, production and sanitary quality of the irrigated lettuce with wastewater from fish and swine activities. The evaluated treatments was: T1 -lettuce irrigated with water from underground origin and supplemental fertilization; T2 -lettuce irrigated with wastewater from fish activities and fish fed with ration; T3 -lettuce irrigated with wastewater from swine treated in stabilization lagoon; and T4 -lettuce irrigated with effluent from seaweed lagoon, fed with wastewater from swine activities treated with anaerobic reactor. The treatments did not present significant differences for next culture characteristics: height, diameter head, length root, mass root, total mass plant, green mass and dry mass; the treatments T4 and T2 presented the biggest values for length and number leaf, respectively; in general, leaf analyses and extraction of macro and micronutrients by culture did not present significant differences; contamination by fecal coliforms in all treatments occurred; no contamination by Escherichia coli was observed in all treatments; all the Coefficients of Uniformity of Christiansen (CUC) observed were above 85%, except for treatment T3 where was 74%; chemical alterations in the soil occurred proportional to characteristics of waters used in the treatments.

show abstract

“…(986). In con(rasr, crisphead lettuce is an irrigated crop that has a shallow root system, maximizing the uptake of water and nutrients applied at the soil surface (Veihmeyer & Holland 1949;Rowse 1974: Jackson & Slivers 1993.…”

Section: Introductionmentioning

confidence: 99%

Shoot and root physiological responses to localized zones of soil moisture in cultivated and wild lettuce (Lactuca spp.)

Gallardo¹,

Jackson²,

Thompson³

1996

Plant Cell & Environment

View full text Add to dashboard Cite

Cultivated crisphead lettuce (Lactuca sativa L.) has a shallower root system than its wild relative, Lactuca serriola L. The effects of localized soil water, at depth, on plant water relations, gas exchange and root distribution were examined in the two species using soil columns with the soil hydraulic‐ally separated into two layers, at (0–20 cm and 20–81) cm, but permitting root growth between the layers. Three treatments were imposed on 7‐week‐old plants, and maintained for 4 weeks: (i) watering, both layers to field capacity; (ii) drying the upper layer while watering the lower layer to field capacity, and (iii) drying both layers. Drying only 0–20 cm of soil had no effect on leaf water status, net photosynthesis, stomatal conductance or biomass production in L. serriola compared to a well‐watered control, but caused a short‐term reduction (10 d) in leaf water status and photosynthesis in L. sativa that reduced final shoot production. The different responses may be explained by differences in root distribution. Just before the treatments commenced, L. serriola had 50% of total root length at 20–80 cm compared to 35% in L. sativa. Allocation of total biomass to roots in L. serriola was approximately double that in L. sativa. The wild species could provide germplasm for cultivated lettuces to extract more soil water from depth, which may improve irrigation efficiency.

show abstract

The effect of irrigation on the length, weight, and diameter of lettuce roots

Cited by 38 publications

References 9 publications

Nutrient Distribution, Growth, and Water Use Efficiency in Maize Following Winter Wheat Irrigated by Sprinklers or Surface Irrigation

Nutrient Distribution, Growth, and Water Use Efficiency in Maize Following Winter Wheat Irrigated by Sprinklers or Surface Irrigation

Reúso de águas residuárias da piscicultura e da suinocultura na irrigação da cultura da alface

Shoot and root physiological responses to localized zones of soil moisture in cultivated and wild lettuce (Lactuca spp.)

Contact Info

Product

Resources

About