Transpiration Reduction Factor and Soybean Yield in Low Land Soil with Ridge and Chiseling

Gubiani, Paulo Ivonir; Müller, Edson I.; Somavilla, André; Zwirtes, Anderson Luiz; Mulazzani, Rodrigo Pivoto; Marchesan, Enio

doi:10.1590/18069657rbcs20170282

Cited by 11 publications

(24 citation statements)

References 34 publications

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“…The deepening of roots is often restricted in lowland areas because the water table level is often close to the surface. Gubiani et al (2018) found that soil moisture was close to the saturation moisture during practically the entire soybean crop cycle in the 300-400 mm layer. In this case, there is a strong impediment to root penetration, considering that soil saturation can cause the death of the soybean taproot and increase the growth of lateral and adventitious roots (Pires et al, 2002).…”

Section: Introductionmentioning

confidence: 75%

“…After R1, AWC1 was maintained at 66 mm. The θmic and θpwp values were, respectively, 0.39 mm 3 mm -3 and 0.17 mm 3 mm -3 (Gubiani et al, 2018).…”

Section: Methodsmentioning

confidence: 93%

“…The deepening of the roots was simulated with a sigmoidal growth curve of the root system (Dourado Neto et al, 1999) as a function of the development rate (DR) calculated by a non-linear model of response to air temperature and photoperiod (Sinclair et al, 1991), according to Equation 2. The maximum depth of 300 mm was defined considering the root depth verified by Gubiani et al (2018) in the study area. After R1, AWC1 was maintained at 66 mm.…”

Section: Methodsmentioning

confidence: 99%

“…Excess water is one of the main risk factors for soybean grown in lowland areas (Bortoluzzi et al, 2017;Gubiani et al, 2018). The assessment of excess water can be performed by measuring the soil water content or aeration condition.…”

Section: Introductionmentioning

confidence: 99%

“…In soils with drainage limitations such as lowland soils, the concept of field capacity based on negligible drainage criteria is difficult to detect in the field. In addition, the time for soil water content to decrease to θfc in lowland soils is greater than in well-drained soils (Gubiani et al 2018). This increased time can result in a significant portion of water available to plants while the water content in the soil is above θfc (de Jong van Lier, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Water balance for determination of excess water in soybean cultivated in lowland soils

et al. 2021

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The aim of this study was to derive a methodology for calculating a sequential water balance that accurately estimates the occurrence of excess water in soybeans cultivated in lowlands. We tested four calculation strategies of water balance associated with the simulation of soybean development, which differed on the calculation of rainfall and time of water drainage from the soil macropores. Data of volumetric moisture monitored in three soil layers throughout the soybean cycle in the 2014/15 agricultural year were used as a reference. Microporosity was used as a lower limit for the occurrence of excess water in the area. Excess water was considered to be whenever the daily volumetric soil moisture in the 0-100 mm layer was greater than 0.39 mm3 mm-3. Over the 111 days of measurement, soil moisture indicated the presence of excess water in 38 days. The traditional calculation strategy of water balance underestimated the occurrence of excess water, as well as the other strategies that considered effective precipitation in their formulas. The calculation strategy that considers that all the rainfall infiltrates in the soil and that the water from macropores is removed only by crop evapotranspiration exhibited good performance and indicated 35 days of excess water, being the most appropriate and recommended for determining excess water in lowland soybeans.

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Section: Introductionmentioning

confidence: 75%

“…After R1, AWC1 was maintained at 66 mm. The θmic and θpwp values were, respectively, 0.39 mm 3 mm -3 and 0.17 mm 3 mm -3 (Gubiani et al, 2018).…”

Section: Methodsmentioning

confidence: 93%