Evapotranspiração E Coeficiente De Cultivo Do Feijão-Caupi Cultivado Em Solo Do Cerrado Submetido À Cobertura Morta

Murga-Orrillo, Hipólito; Araújo, Wellington Farias; Rocha, Paulo Roberto Ribeiro; Sakazaki, Roberto Tadashi; Dionísio, Luiz Fernandes Silva; Polo-vargas, Ana Rosa

doi:10.15809/irriga.2016v21n1p172-187

Cited by 9 publications

(11 citation statements)

References 15 publications

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“…Reduction in water availability (availability of 25%) during the pod filling stage did not cause reduction in the production of cowpea plants (Figure 1). This can be explained by the lower water requirement in this period (Murga-Orrillo et al, 2016) and by the lower number of days along which plants were exposed in this stage (Ndiso et al, 2016) (Figure 2). DF = degrees of freedom; CV = coefficient of variation; ns = not significant, ** significant at 1% probability level, * significant at 5% probability level by Tukey test.…”

Section: Resultsmentioning

confidence: 99%

Water restriction in different phenological stages and increased temperature affect cowpea production

et al. 2021

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Water deficit and high temperatures are abiotic factors that most limit plant growth and development. However, its effects depend on crop development stage and on stress duration and intensity. Thus, the objective of was to evaluate the development of cowpea subjected to water restriction in different phenological stages and to increase in air temperature. The experiment was conducted with the cultivar ‘Carijó’, in growth chambers, in a 4 x 3 x 2 factorial arrangement, corresponding to levels of water availability (25, 50, 75, and 100%,), phenological stages (vegetative, flowering and pod filling) and temperature regimes (T°1: 20-26-33 °C e T°2: 24.8-30.8-37.8 °C), respectively. Reduction of water availability in the vegetative and flowering stages caused decrease in grain production. The percentage of aborted flowers was higher in plants maintained under an increased temperature of +4.8 °C, with consequent reduction in grain production. Higher water availability values favored shoot and root dry mass production. Increase of 4.8 °C did not affect shoot and root dry mass but reduced water use efficiency by about 83%. The highest enzymatic activities of CAT, GPX and SOD were found in plants subjected to the temperature of +4.8 °C. Only APX showed lower enzymatic activity with increasing temperature. The cv. ‘Carijó’ is more sensitive to the 4.8 °C increase in air temperature than to water deficits.

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Section: Resultsmentioning

confidence: 99%

Water restriction in different phenological stages and increased temperature affect cowpea production

et al. 2021

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“…Although the maximum response occurred in the absence of hydrogel -0.0kg ha -1 (Ȳ = 3.35% oil), the use of Polim-Agri PP and Hydroplan-EB HyC sources at a concentration of 20kg ha -1 recovered the oil content of the grains, respectively, 0.43 and 0.70%, compared to the lowest accumulation observed at the estimated mean concentration of 12.72kg ha -1 . The water deficit is one of the abiotic stresses that most affect the development of cowpea in the Cerrado, especially when it occurs in periods of pre-flowering, where the average daily demand is higher (mean = 5.4mm day -1 ) (Bastos et al, 2008), requiring a total of 338.4mm throughout its cycle in a conventional system (Murga-Orrillo et al, 2016). In this study, mean daily availability was 4.65 mm and total of 363 mm, reinforcing that the effects of water limitations are more related to the rainfall distribution than to the total amount of rainfall during the cycle, whose temperatures remained within of the appropriate range from 18 to 34ºC.…”

Section: Resultsmentioning

confidence: 99%

“…Although this legume is relatively tolerant to water deficit (Dutra et al, 2015), the reduction in the availability of water in the soil due to periods of drought and high temperatures impairs the plant metabolism, causing morphophysiological and biochemical modifications that affect its growth and development (Taiz and Zeiger, 2013;Boughalleb et al, 2016), especially if stress occurs at the reproductive stage of the crop (Murga-Orrillo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Biochemical quality of cowpea beans grown under water-deficit maintained with hydrogel

Fidélis

Silva²,

Rauber

et al. 2020

rcia

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Investigations related to the effects of the hydrogel use in a water-deficit conditions on the biochemical composition of the harvested products are scarce. The aim of this study was to verify the influence of hydrogel on the biochemical response of cowpea beans produced under water-deficit in southern Tocantins. The experiment was a randomized complete block design with four replications. The treatments were obtained in a 2x5 factorial scheme, being: two sources of hydrogel (Hydroplan-EB HyC and Polim-Agri PP) and five concentrations (0, 5, 10, 15, and 20kg ha-1). After harvesting, the grains of cowpea, BRS Vinagre cultivar, were ground and chemically analyzed. The oil content of the seeds agreed with the reference values. The use of Polim-Agri PP promoted the best levels of amino acids (0.38mg g-1) and proteins (243.22mg g-1) of the grains. The carbohydrate content of them (Ȳ= 81.44mg g-1) was better using Hydroplan-EB HyC, regardless of the concentration applied. The application of 6.28kg ha-1 of Polim-Agri PP provided the highest starch content (842g mg-1). The use of hydrogel improves the biochemical quality of cowpea beans produced under water deficit in southern Tocantins.

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“…Crop evapotranspiration (mm) expresses the crop moisture requirement for a specific location and period and is affected by climate parameters and crop coefficients (Farg, Arafat, El-Wahed, & El-Gindy, 2012;Murga-Orrillo et al, 2016;Zhang, Shen, Zheng, & Xing, 2014). The ETaw (mm) was calculated based on the ETc and directly reflects the crop irrigation requirement (Snyder, Geng, Orang, & Sarreshteh, 2012;Williamson, 1982;Yang, Gao, Shi, Chen, & Chu, 2013).…”

Section: Calculation Of Crop Evapotranspiration and Evapotranspiratiomentioning

confidence: 99%

Assessment of winter wheat water‐saving potential in the groundwater overexploitation district of the North China Plain

Jiang

Wang

et al. 2020

Agronomy Journal

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Water resources are the largest limiting factors for wheat (Triticum aestivum L.) production in the North China Plain (NCP). Irrigation used in wheat production has caused a reduction in the groundwater table and aggravated regional water scarcity. In this research, we analyzed the spatiotemporal changes in winter wheat cropping area and water balance during the winter wheat growing season in the groundwater overexploitation district (GOD) from 1985 to 2015. Focusing on typical districts, we set different optimized cropping scenes and estimated water‐saving potential based on current national policy (fallow planting area and reduce irrigation events). The winter wheat area increased in the GOD during the past 30 yr, especially in deep overexploitation area (DOA). There was a slight decrease in shallow overexploitation area (SOA) but a slight increase in the mixed area (MA). The winter wheat area was more concentrated in DOA during the past 30 yr. Lower precipitation, higher crop evapotranspiration (ETc), and higher evapotranspiration of applied water (ETaw) occurred in the GOD than in other areas in the NCP. We set optimized planting scenes that fallow 10% cultivated area in DOA and 5% in MA while reducing one irrigation event in the whole area. Results showed that the water‐saving potential in GOD could reach 14.09 billion m3 with 4.54 Tg yield lost. This research can help us better understand the influence of winter wheat production on groundwater overexploitation and is useful for the government to develop and extend ongoing adaptation strategies for coping with groundwater overexploitation events.

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Evapotranspiração E Coeficiente De Cultivo Do Feijão-Caupi Cultivado Em Solo Do Cerrado Submetido À Cobertura Morta

Cited by 9 publications

References 15 publications

Water restriction in different phenological stages and increased temperature affect cowpea production

Water restriction in different phenological stages and increased temperature affect cowpea production

Biochemical quality of cowpea beans grown under water-deficit maintained with hydrogel

Assessment of winter wheat water‐saving potential in the groundwater overexploitation district of the North China Plain

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