Sonda de TDR para estimativa da umidade e condutividade elétrica do solo, com uso de multiplexadores

Coelho, E. F.; Vellame, Lucas Melo; Filho, M. A. Coelho

doi:10.1590/s1415-43662005000400006

Cited by 13 publications

(5 citation statements)

References 9 publications

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“…et al (2003) e Souza & Matsura (2004); no entanto, os últimos autores discordam quanto ao movimento vertical, dizendo que tende a diminuir. O aumento vertical nos sistemas enterrados é superior ao superficial em aproximadamente 0,30 m, discordando de Coelho et al (2005b) que encontraram menores valores de expansão lateral para emissores enterrados.…”

Section: Resultsunclassified

Distribuição de água no solo aplicado por gotejamento enterrado e superficial

Barros

Folegatti

Souza

et al. 2009

Rev. bras. eng. agríc. ambient.

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Devido à falta de estudos sobre o movimento da água quando aplicada abaixo da superfície, realizou-se este trabalho com o objetivo de avaliar a distribuição de água aplicada pelo sistema de gotejamento enterrado e convencional. O experimento de campo foi conduzido na área experimental do Departamento de Engenharia Rural da ESALQ/USP - Piracicaba, SP. Para o estudo, trincheiras foram abertas e instaladas sondas de TDR, dispostas a 0,05; 0,15; 0,25; 0,35 e 0,45 m profundidade, e a 0,05; 0,15; 0,25; 0,35 m comprimento, totalizando 17 sondas por trincheira. Os tratamentos foram baseados na profundidade de aplicação (0,0 e 0,10 m) e vazão aplicada (2 e 4 L h-1): ENT2; ENT4; SUP2 e SUP4. A cada hora era aplicado 1 L de água (total de 10 L), seguida de leituras com o TDR. Medições do disco úmido e saturado foram feitas com régua milimetrada; além disso, estabeleceu-se um volume controle onde foi avaliada a uniformidade de aplicação; assim, foi possível verificar, em relação aos sistemas superficiais, que os sistemas enterrados apresentaram menor área superficial molhada e atingiram maior largura e profundidade; já as maiores concentrações foram obtidas próximas ao ponto de emissão.

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Section: Resultsunclassified

Distribuição de água no solo aplicado por gotejamento enterrado e superficial

Barros

Folegatti

Souza

et al. 2009

Rev. bras. eng. agríc. ambient.

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“…Soil moisture was monitored by a time-domainreflectometry (TDR) equipment, considering measurements at depths from 0 to 25 cm, as recommended by Coelho et al (2005) and Ahmadi et al (2013).…”

Section: Methodsmentioning

confidence: 99%

Water Depletion Depth for Irrigation of Potato Cultivar Ágata

Silva

Jadoski²,

Martinkoski

2019

Eng. Agríc.

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Potato (Solanum tuberosum L.) cultivation has a high demand for management and treatments during the vegetative cycle in the field. Among these requirements, water management is a limiting factor of tuber productivity and quality. This study aimed to determine the most appropriate soil water depletion depth for irrigation management in potato crops of Ágata cultivar, under the edaphoclimatic conditions of Guarapuava-PR, considering its influence on crop vegetative development. The study was conducted using four water depletion depths in the soil (12, 24, 36, and 48 mm). The different irrigation treatments promoted differences in shoot dry mass, leaf area index (LAI), number of tubers per plant, and productivity. The highest yield was observed for 27.62 mm depletion. When irrigation depth was increased to 48 mm, tubers showed individual mass reduction and hence productivity, affecting commercial classification. A cumulative depletion of about 27 mm between irrigations proved to be the most adequate management to supply the water demand of Ágata potato cultivar.

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“…Reference evapotranspiration (ETo) by the Penman-Monteith-FAO method for the months of November and December 0.10 m-long TDR probes with 3.50-m-long cable (Coelho et al, 2005) were built and connected to multiplexers of SMDX type. A reflectometer TDR 100 was connected to the multiplexers and to a data acquisition and storage system (datalogger) composing an automatic system for soil water content (SWC) data acquisition.…”

Section: Figurementioning

confidence: 99%

Consumptive water use of banana under micro irrigation using a soil-water balance approximation

Campos

Coelho

Santos

et al. 2022

Rev. bras. eng. agríc. ambient.

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DMulching contributes to the maintenance of soil moisture at reasonable levels for crop growth. It influences the crop water demand and irrigation time. The aim of this study was to estimate evapotranspiration and root water uptake by the ‘BRS Princesa’ banana cultivar through a simple approach using some components of soil water balance within the root zone in bare and mulched soil irrigated by drip and micro sprinkler systems. The experimental design was completely randomized in split plots with six replicates. The plots consisted of two irrigation systems (drip and micro sprinkler), the subplots consisted of two soil surface conditions: with and without mulch. The alternative approach for soil water percolation in the soil water balance allowed obtaining ETc under field condition with reasonable accuracy. ETc estimated from the root zone water balance is lower than ETc from FAO Penman-Monteith equation. Root water extraction in the mulched soil under drip irrigation is higher than that under micro sprinkler irrigation.

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Sonda de TDR para estimativa da umidade e condutividade elétrica do solo, com uso de multiplexadores

Cited by 13 publications

References 9 publications

Distribuição de água no solo aplicado por gotejamento enterrado e superficial

Distribuição de água no solo aplicado por gotejamento enterrado e superficial

Water Depletion Depth for Irrigation of Potato Cultivar Ágata

Consumptive water use of banana under micro irrigation using a soil-water balance approximation

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