Tensão e extração de água em mesa de tensão e coluna de areia, em dois solos com elevada densidade

Gubiani, Paulo Ivonir; Albuquerque, Jackson Adriano; Reinert, Dalvan José; Reichert, José Miguel

doi:10.1590/s0103-84782009005000199

Cited by 27 publications

(10 citation statements)

References 5 publications

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“…The undisturbed soil samples were used to evaluate soil water retention. The samples were saturated in plastic containers by capillary action for 48 h, and then equilibrated to -1, -6, and -10 kPa matric potential on a tension table (Reinert and Reichert, 2006;Gubiani et al, 2009) and to -33, -70, and -100 kPa on pressure plates (Klute, 1986). Water retention at lower matric potentials of -500, -1000, and -1500 kPa was determined using the Dewpoint PotentiaMeter (WP4, Decagon Incorporation, USA), following the methodology by Klein et al (2006) and modified by Gubiani et al (2013), using air-dried and homogenized soil samples after passing through a 2-mm sieve.…”

Section: Soil Water Porosity Bulk Density and Degree Of Compactionmentioning

confidence: 99%

Is cassava yield affected by inverting tillage, chiseling or additional compaction of no-till sandy-loam soil?

Reichert¹,

Fontanela²,

Awe³

et al. 2021

Revista Brasileira De Ciência Do Solo

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Section: Soil Water Porosity Bulk Density and Degree Of Compactionmentioning

confidence: 99%

Is cassava yield affected by inverting tillage, chiseling or additional compaction of no-till sandy-loam soil?

Reichert¹,

Fontanela²,

Awe³

et al. 2021

Revista Brasileira De Ciência Do Solo

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“…To determine the soil water retention curve (WRC) and porosity, samples (three repetitions) were saturated for 48 h and weighed. Then, they were taken to a sand tension table, subjecting to tensions of 1, 6, and 10 kPa (Gubiani et al, 2009) and Richards chambers under 33, 100, 300, 500, and 1500 kPa (Libardi, 2005). With the data of tension and volumetric moisture, the WRC was fitted (van Genuchten, 1980) using a soil water retention curve software (Dourado Neto et al, 2000).…”

Section: = 100 × (Bd/bd M )mentioning

confidence: 99%

Soil compaction effect on black oat yield in Santa Catarina, Brazil

Andognini¹,

Albuquerque²,

Warmling³

et al. 2020

Revista Brasileira De Ciência Do Solo

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Cultivated soils, when submitted to agricultural practices, tend to compact due to the pressure exerted by agricultural machines and implements, a process that compromises soil quality and system sustainability. Specific properties of each soil, such as particle size and organic matter content, interfere with the process and degree of compaction and, consequently, plant growth. This study aimed to analyze the effect of different degrees of compaction (DC) on soil physical properties and black oat (Avena strigosa Schreb) growth. For this purpose, four soils were collected: Latossolo Vermelho distrófico retrático (Ferralsol LV CN), Cambissolo Húmico alumínico típico (Cambisol CH LG), Nitossolo Bruno distrófico típico (Nitisol NB PA), and Nitossolo Bruno distrófico húmico (Nitisol NB SJ). They were submitted to five degrees of compaction (bulk densities corresponding to 80, 85, 90, 95, and 100 % DC), defined by their relation to the maximum density obtained by the Normal Proctor Test. For each DC, porosity, soil water retention curve, penetration resistance, hydraulic conductivity, and aeration capacity were determined. In a greenhouse, the oats were cultivated in the four soils with five different degrees of compaction. The experiment was carried out in a completely randomized design, factorial scheme, and five replications. Crop measurements included the growth rate, shoot dry matter, and forage quality analysis. Soil compaction changed the physical properties of soils. In all tested soils, macroporosity and total porosity decreased, more intensely at LV CN. It had macroporosity below the critical level (0.10 m 3 m-3) from DC 85. Hydraulic conductivity also decreased in all soils, which is evidence of significant environmental degradation from DC 90 onwards. Microporosity increased in the four soils due to compaction effect, and it is one of the reasons why permanent wilting point has increased. It resulted in a problem at NB SJ , mainly because it reduced the available water volume at DC 90, 95, and 100. Penetration resistance has also increased from DC 80 to 100 at all soils, exceeding the limit of 2 MPa in DC 80 for NB SJ , DC 85 for NB PA and LV CN , and DC 95 for CH LG , representing a risk to root development. Regarding black oat crop, there was a reduction in shoot dry matter only in Cambisol and in the higher DC, fiber content keeps within a satisfactory amount, without affecting forage quality in all soils and DC, thus showing that black oat is tolerant to compaction.

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“…The L and I were considered as subplots. The soil porosity and bulk density were determined according to Gubiani et al (2009). The stability of aggregates was determined by wet sieve, and expressed by the weighted mean diameter (WMD) (Kemper & Chepil, 1965).…”

Section: Injeção De Dejeto Líquido De Suínos E Efeitos Sobre As Proprmentioning

confidence: 99%

Injection of liquid swine slurry and effects on properties of a Nitossolo Vermelho

Rech

Albuquerque

Corrêa

et al. 2018

Pesq. agropec. bras.

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The objective of this work was to evaluate the superficial and injected applications of swine slurry and urea to the soil, regarding their effects on the physical properties of a Nitossolo Vermelho distroférrico under a no-tillage system. The treatments were: injected slurry into the groove with a liquid swine slurry injector (LSSI); slurry on surface, applied on the lines by the LSSI kept raised; urea injected by opening the groove with the LSSI and distributed manually; and corn, under no-tillage, as a control. Sowing and the injection of liquid slurry or urea do not modify the organic carbon content, pH, and aggregation, but alter the soil bulk density and porosity in the mobilized line, and increase the macropores.

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Tensão e extração de água em mesa de tensão e coluna de areia, em dois solos com elevada densidade

Abstract: III

Cited by 27 publications

References 5 publications

Is cassava yield affected by inverting tillage, chiseling or additional compaction of no-till sandy-loam soil?

Is cassava yield affected by inverting tillage, chiseling or additional compaction of no-till sandy-loam soil?

Soil compaction effect on black oat yield in Santa Catarina, Brazil

Injection of liquid swine slurry and effects on properties of a Nitossolo Vermelho

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