scholarly journals Water deficit on the growth and yield of irrigated soybean in the Brazilian Cerrado region

2021 ◽  
Vol 25 (11) ◽  
pp. 750-757
Author(s):  
Elvis da S. Alves ◽  
Lineu N. Rodrigues ◽  
Rubens A. de Oliveira ◽  
Douglas R. Lorena
Keyword(s):  
Water Use ◽  
Deficit Irrigation ◽  
Management Strategy ◽  
Irrigation Management ◽  
Water Withdrawal ◽  
Growth And Yield ◽  
Brazilian Cerrado ◽  
Water Restriction ◽  
Irrigation Strategy ◽  
Available Water

ABSTRACT The increase in disputes over water use in the Brazilian Cerrado has demanded improvements in irrigation management and increase in water use productivity. In this context, deficit irrigation is an interesting management strategy, as it enables water savings without significant losses of yield. The present study aimed to evaluate the phenology and yield of a soybean cultivar subjected to different soil moisture contents. The experimental design used was randomized blocks with five treatments and four replicates. In each treatment, an irrigation strategy was applied based on the available water in the soil (AW). The T1 treatment was performed by applying from 80 to 100% AW; in T2 treatment, the allowed variation was from 60 to 80% AW; in T3 treatment, it was from 40 to 60% AW; in T4, from 20 to 40% AW; and in T5, from 0 to 20% AW. It was verified that, in winter and summer, even without the need to reduce water withdrawal, it is recommended to apply from 60 to 80% of the available water in the soil for soybean crop, without decreasing yield. In situations of water restriction, it is possible to have yield of around 55 and 70% in winter and summer, respectively, for the condition from 20 to 40% of the available water in the soil.

scholarly journals Determination of a long-term optimal irrigation strategy for dry beans in Parana State, Brazil

1997 ◽  
Vol 54 (spe) ◽  
pp. 155-164 ◽  
Author(s):  
R.T. de Faria ◽  
M.V. Folegatti ◽  
J.A. Frizzone ◽  
A.M. Saad
Keyword(s):  
Management Strategy ◽  
Irrigation Management ◽  
Growth Conditions ◽  
Threshold Values ◽  
Dry Beans ◽  
Irrigation Strategy ◽  
Product Price ◽  
Net Return

The economical benefits of different irrigation strategies were assessed by long term simulation (20 years) for dry beans in Paraná, Brazil. The model BEANGRO was used to simulate crop yield and irrigation requirements assuming eight levels of irrigation threshold (20 to 90% of the remaining soil available water in steps of 10%), in addition to a level considering no irrigation. Net return was the objective function to select the optimum irrigation management strategy, assuming fixed and stochastic distributions of historical product price. The results showed that yield was significantly increased by irrigation despite a high variability for all the simulation strategies, due to variations on growth conditions over the years. Although the net return was highly variable, it was positive in 75% of the years for all strategies with threshold values higher than 30%. The strategy of irrigating the crop before the soil reaches 60% AW provided the maximum economical benefits. The high profit using this improved strategy justifies the practice of irrigation for beans in Paraná.

scholarly journals Irrigation management strategies for reducing verticillium wilt severity in eggplants

2020 ◽  
Vol 46 (1) ◽  
pp. 9-13
Author(s):  
Ricardo Nunes Cabral ◽  
Waldir Aparecido Marouelli ◽  
Adalberto C. Café-Filho
Keyword(s):  
Verticillium Wilt ◽  
Water Availability ◽  
Management Strategy ◽  
Irrigation Management ◽  
Management Strategies ◽  
Dry Mass ◽  
Infested Soil ◽  
Irrigation Strategy ◽  
Available Soil Moisture ◽  
The Relationship

ABSTRACT Verticillium wilt in eggplants is a root disease of difficult control. In this study, we report the relationship between soil water availability and the disease intensity in order to identify management strategies that are unfavourable to the pathogen and capable of reducing the disease progression and the damage caused by it. Four irrigation management strategies were compared in soil infested or not infested with Verticillium dahliae, which consisted of: irrigating when the available soil moisture was maintained at 90% (WA90%), 55% (WA55%) and 20% (WA20%) during the entire growing cycle, and kept at 20% in the vegetative stage, and at 90% in the production stage (WA20-90%). Experimental design was in randomized blocks, including eight treatments in factorial arrangement (4x2) and three replicates. The management strategy WA20-90% led to a significant reduction in the disease severity and in the extent of xylem colonization by the pathogen. The dry mass of plants in infested soil was 12% lower than that of control treatments and was higher with the irrigation strategy WA90% than with WA55% or WA20%. The strategy WA20-90% was efficient in reducing the disease with no significant reduction in dry mass.

scholarly journals Irrigation management strategy for Prata-type banana

2016 ◽  
Vol 20 (9) ◽  
pp. 817-822 ◽  
Author(s):  
Marcelo R. dos Santos ◽  
Sérgio L. R. Donato ◽  
Lilian L. Lourenço ◽  
Tânia S. Silva ◽  
Mauricio A. Coelho Filho
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Management Strategy ◽  
Reference Evapotranspiration ◽  
Irrigation System ◽  
Irrigation Management ◽  
Crop Coefficient ◽  
Mother And Daughter ◽  
Production Cycles ◽  
Use Efficiency

ABSTRACT This study aimed to analyze different irrigation strategies in two cultivars of the banana crop. The study was conducted in four production cycles of ‘Prata-Anã’ and ‘BRS Platina’ bananas. The applied irrigation depths (ID) were obtained by the model ID = K x LA x ETo, where K is an empirical transpiration constant of 0.20; 0.35; 0.50 and 0.65 for the strategies 1, 2, 3 and 4, respectively; LA is the leaf area of mother and daughter plants of ‘Prata-Anã’ and ETo is the reference evapotranspiration. The strategy 5 was obtained according to the crop evapotranspiration, ETc = ETo x Kc, where Kc is the crop coefficient. Drip irrigation system was used, with two laterals per plant row and emitters with flow rate of 8 L h-1, spaced at 0.50 m. It was found that ‘Prata-Anã’ is more efficient than ‘BRS Platina’ in terms of water use and the model for irrigation management, ID = 0.35 x LA x ETo, is recommended to optimize water use by ‘Prata-Anã’ and ‘BRS Platina’ bananas, with increase in water use efficiency and maintenance of yield. The same model, with K coefficient equal to 0.50, makes it possible to obtain yield and water use efficiency equal to those obtained with irrigation management based on the ETc.

scholarly journals Optimized Regulated Deficit Irrigation Management for Watermelon Cultivation in a Semiarid Region

2021 ◽  
Vol 9 (2) ◽  
pp. 113
Author(s):  
Kelly Nascimento Leite ◽  
Daniel Fonseca de Carvalho ◽  
Jose Maria Tarjuelo Martin- Benito ◽  
Geocleber Gomes de Sousa ◽  
Alfonso Dominguez Padilla
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Scarcity ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Control Treatment ◽  
Water Volume ◽  
Semiarid Region ◽  
Regulated Deficit Irrigation ◽  
Use Efficiency

The present study aimed to validate the MOPECO crop simulation model and to determine a viable irrigation management for watermelon in the semiarid region of Northeast Brazil, using methodologies of optimized regulated deficit irrigation (ORDI) and constant deficit irrigation (CDI). The experiment was carried out during October to December 2013 and the second one from July to August 2014 in plots of land of producers in the Baixo Acaraú Irrigated Perimeter – Ceará, Brazil. Treatments were characterized by ORDI management (70, 80, 90% ETa/ETm ratio) and CDI management along the entire cycle (70, 80 and 90% ETm) and control treatment, irrigated with 100% of the water requirement of the crop (ETm). In terms of saving of water resources, the results showed that management with regulated deficit irrigation leads to favorable and economically viable results for the farmer, of water saving, especially in a situation of severe water scarcity, irrigation management with regulated water deficit (ORDI) can provide favorable and economically viable results for the farmer. The highest value of WUE (41.8 kg m-3) was obtained with the treatment of lowest water volume applied (352.1 L) in the second experiment, decreasing with the increase in the water volume used. The ORDI methodology represents a better water use efficiency for all treatments of deficit applied compared to CDI treatments. The difference of ORDI and CDI methodology provided an increase of up to 200% in the gross margin obtained with the exploration of the watermelon culture which represents a range of R$ 986.00 in profit in a situation of water scarcity, as in the case of the studied region, the strategy with water supply of 70% of ETa/ETm ratio regulated by phenological stage was recommended in order to obtain highest water use efficiency.

The effects of regulated and continuous deficit irrigation on the water use, growth and yield of olive trees

2009 ◽  
Vol 30 (4) ◽  
pp. 258-265 ◽  
Author(s):  
F. Iniesta ◽  
L. Testi ◽  
F. Orgaz ◽  
F.J. Villalobos
Keyword(s):  
Water Use ◽  
Deficit Irrigation ◽  
Growth And Yield ◽  
Olive Trees

scholarly journals Yield and Leaf Quality of Processing Spinach under Deficit Irrigation

HortScience ◽  
2005 ◽  
Vol 40 (6) ◽  
pp. 1868-1870 ◽  
Author(s):  
Daniel I. Leskovar ◽  
Giovanni Piccinni
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
High Water ◽  
Water Savings ◽  
Leaf Quality ◽  
Spinacea Oleracea ◽  
Use Efficiency ◽  
Irrigation Treatments

Restrictions placed on water usage for farmers have prompted the development of irrigation management projects aiming at water savings of economically important crops. The objective of this work was to determine yield, water use efficiency, and leaf quality responses to deficit irrigation rates of processing spinach (Spinacea oleracea L.) cultivars. Three irrigation treatments were imposed with a center pivot system, 100%, 75%, and 50% crop evapotranspiration rates (ETc). Commercial cultivars used were `DMC 09', `ASR 157', and `ACX 3665'. Leaf quality was significantly affected by deficit irrigation rate and cultivar. Leaf yellowness was highest at 50% ETc, and was more evident for `ACX 3665'. The percent excess stem (>10 cm) was higher at 100% ETc. This response was greater in `ACX 3665' than in `ASR 157' and `DMC 09'. Marketable yields were significantly higher for `ASR 157' at either 100% or 75% ETc rates, compared to `DMC 09' and `ACX 3665'. High water use efficiency was also measured at 75% ETc for `ASR 157'. Minimum canopy temperature differences were detected among the irrigation treatments. This work demonstrated that it is possible to reach a 25% water savings in one season, without reducing yields when using vigorous cultivars.

scholarly journals VIABILIDADE ECONÔMICA DA IRRIGAÇÃO DE CANA-DE-AÇÚCAR NO CERRADO BRASILEIRO

Irriga ◽  
2015 ◽  
Vol 1 (2) ◽  
pp. 149-157 ◽  
Author(s):  
Rodrigo Moura Pereira ◽  
José Alves Júnior ◽  
Derblai Casaroli ◽  
Deborah Lidia Sales ◽  
Walter Danilo Maradiaga Rodriguez ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Water Requirement ◽  
Economic Viability ◽  
Full Irrigation ◽  
Brazilian Cerrado ◽  
Saccharum Spp ◽  
Total Cost ◽  
Plant Stage

VIABILIDADE ECONÔMICA DA IRRIGAÇÃO DE CANA-DE-AÇÚCAR NO CERRADO BRASILEIRO RODRIGO MOURA PEREIRA¹; JOSÉ ALVES JÚNIOR¹; DERBLAI CASAROLI¹; DEBORAH LIDIA SALES¹; WALTER DANILO MARADIAGA RODRIGUEZ¹ E JOÃO MAURÍCIO FERNANDES SOUZA¹ ¹Núcleo de Pesquisas e Recursos Hídricos do Cerrado – Escola de Agronomia -  Universidade Federal de Goiás, Rodovia Goiânia / Nova Veneza, Km 0, Goiânia, Goiás, CEP: 74690-900 email: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]  1 RESUMO Objetivou-se avaliar a viabilidade econômica da irrigação em cana-de-açúcar na região do Cerrado em função de perspectivas de retorno associadas a diferentes manejos de irrigação: i) lâmina plena (493,56 mm ano-1); ii) suplementar com déficit (50 % da necessidade hídrica, 235,37 mm ano-1); iii) salvamento (80 mm ano-1). O custo total dos manejos de irrigação plena, suplementar com déficit e salvamento em cana-planta foram de R$ 15.759,17 ha-1, R$ 13.291,16 ha-1, e R$ 8.627,09 ha-1, respectivamente. Os indicadores analisados mostraram que a irrigação em cana-de-açúcar gera em 30 anos de investimento, no manejo de irrigação plena Valor Presente Líquido (VPL) = R$ 1.972,87 ha-1 ano-1, Taxa interna de Retorno (TIR) = 61,11%, Payback = 3 anos e Relação Benefício Custo (B/C) = 1,7. No manejo com déficit VPL = R$ 1.379,78 ha-1 ano-1, TIR = 52,99%, Payback = 3 anos e Relação B/C = 1,5 e no salvamento, VPL = R$ 984,10 ha-1 ano-1 TIR = 91,48%, Payback = 3 anos e Relação B/C = 1,4. A irrigação plena apresentou a maior lucratividade, seguida pela irrigação com déficit com lucro 30,06% menor, e de salvamento, com um lucro 50,11% menor que a irrigação plena. Palavras-chave: manejo da irrigação, Saccharum spp., Cerrado, análise econômica  PEREIRA, R. M.; ALVES JUNIOR, J.; CASAROLI D.; SALES D. L.; RODRIGUEZ, W. D. M.; SOUZA, J. M. F.ECONOMIC VIABILITY OF SUGARCANE IRRIGATION IN THE BRAZILIAN CERRADO  2 ABSTRACT This study aimed to evaluate te economic viability of sugarcane irrigation in the Cerrado region in function of perspectives of return associated with  different irrigation management: i) full blade (493.56 mm year-1); ii) supplement with deficit (50% of water requirement, 235.37 mm year-1); iii) rescue (80 mm year-1). The total cost of the managements of full irrigation, supplement with deficit and rescue in cane plant stage were[1]*US$ 4,955.71 ha-1, US$ 4,179.61 ha-1, and US$ 2,712.92 ha-1, respectively. The indicators analyzed showed that irrigation in sugarcane generates over 30 years of investment in full irrigation management VPL = US$ 620.39 ha-1 year‑1, TIR = 61.11%, Payback = 3 years and Ratio B/C = 1.7. In the deficit irrigation VPL = US$ 433.89 ha-1 year-1, TIR = 52.99%, Payback = 3 years and Ratio B/C = 1.5 and in the rescue irrigation, VPL = US$ 309.46 ha-1 year-1 TIR = 91.48%, Payback = 3 years and B/C = 1.4. The full irrigation presented the highest profitability, followed by irrigation with deficit with profit 30.06% lower, and rescue equipment, with a 50.11% lower profit that full irrigation US$ = R$ 3,18 07/07/2015 Keywords: Irrigation management; Saccharum spp., Cerrado, economic analysis 

scholarly journals Optimizing Et-Based Irrigation Scheduling for Wheat and Maize with Water Constraints

2017 ◽  
Vol 60 (6) ◽  
pp. 2053-2065 ◽  
Author(s):  
Liwang Ma ◽  
Zhiming Qi ◽  
Yanjun Shen ◽  
Liang He ◽  
Shouhua Xu ◽  
...  
Keyword(s):  
Grain Yield ◽  
Water Use Efficiency ◽  
Water Use ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Irrigation Scheduling ◽  
Weather Data ◽  
Growth Stages ◽  
Area Index ◽  
Use Efficiency

Abstract. Deficit irrigation has been shown to increase crop water use efficiency (WUE) under certain conditions, even though the yield is slightly reduced. In this study, the Root Zone Water Quality Model (RZWQM) was first calibrated with measured data from a large weighing lysimeter from 1998 to 2003 at the Yucheng Experimental Station in the North China Plain for daily evapotranspiration (ET), soil water storage (0-120 cm), leaf area index (LAI), aboveground biomass, and grain yield. The calibrated model was then used to explore crop responses to ET-based irrigation management using weather data from 1958 to 2015 and identify the most suitable ET-based irrigation schedules for the area. Irrigation amount was determined by constraining irrigation to a percentage of potential crop ET (40%, 60%, 80%, and 100% ETc) at the various growth stages of wheat [planting to before winter dormancy (P-D), green up to booting (G-B), booting to flowering (B-F), and flowering to maturity (F-M)] and of maize [planting to silking (P-S) and silking to maturity (S-M)], subject to seasonal water availability limits of 100/50, 200/100, 300/150, and 400/200 mm and no water limit for wheat/maize seasons, respectively. In general, wheat was more responsive to irrigation than maize, while greater influence of weather variation was simulated on maize than on wheat. For wheat with seasonal water limits, the highest average WUE was simulated with the highest targeted ETc levels at both the G-B and B-F stages and lower targeted ETc levels at the P-D and F-M stages. However, the highest average grain yield was simulated with the highest targeted ETc levels at all four growth stages for no water limit and the 400 mm water limit, or at both the G-B and B-F stages for the 300 and 200 mm water limits. For maize, lower targeted ETc levels after silking did not significantly affect maize production due to the high season rainfall, but irrigation of 60% ETc before silking was recommended. These results could be used as guidelines for precision irrigation along with real-time weather information. Keywords: Deficit irrigation, Evapotranspiration, Growth stage, RZWQM, Water use efficiency, Wheat and maize.

scholarly journals Using High-Spatiotemporal Thermal Satellite ET Retrievals for Operational Water Use and Stress Monitoring in a California Vineyard

2019 ◽  
Vol 11 (18) ◽  
pp. 2124 ◽  
Author(s):  
Knipper ◽  
Kustas ◽  
Anderson ◽  
Alsina ◽  
Hain ◽  
...  
Keyword(s):  
Data Fusion ◽  
Water Use ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Growing Season ◽  
Irrigation Scheduling ◽  
Data Availability ◽  
Sensor Data ◽  
Water Requirements ◽  
Fusion Approach

In viticulture, deficit irrigation strategies are often implemented to control vine canopy growth and to impose stress at critical stages of vine growth to improve wine grape quality. To support deficit irrigation scheduling, remote sensing technologies can be employed in the mapping of evapotranspiration (ET) at the field to sub-field scales, quantifying time-varying vineyard water requirements and actual water use. In the current study, we investigate the utility of ET maps derived from thermal infrared satellite imagery over a vineyard in the Central Valley of California equipped with a variable rate drip irrigation (VRDI) system which enables differential water applications at the 30 × 30 m scale. To support irrigation management at that scale, we utilized a thermal-based multi-sensor data fusion approach to generate weekly total actual ET (ETa) estimates at 30 m spatial resolution, coinciding with the resolution of the Landsat reflectance bands. Crop water requirements (ETc) were defined with a vegetative index (VI)-based approach. To test capacity to capture stress signals, the vineyard was sub-divided into four blocks with different irrigation management strategies and goals, inducing varying degrees of stress during the growing season. Results indicate derived weekly total ET from the thermal-based data fusion approach match well with observations. The thermal-based method was also able to capture the spatial heterogeneity in ET over the vineyard due to a water stress event imposed on two of the four vineyard blocks. This transient stress event was not reflected in the VI-based ETc estimate, highlighting the value of thermal band imaging. While the data fusion system provided valuable information, latency in current satellite data availability, particularly from Landsat, impacts operational applications over the course of a growing season.

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