Soil Properties and Plant Biomass Production in Natural Rangeland Management Systems

Werner, Romeu de Souza; Barbosa, Fabrício Tondello; Bertol, Ildegardis; Wolshick, Neuro Hilton; Santos, Kristiana Fiorentin dos; Mota, Josie Moraes

doi:10.1590/18069657rbcs20150117

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…The Bd increase and the Ma reduction in the CLI and BR areas are probably due to the compaction caused by machine and agricultural implements traffic, and animal trampling. Werner et al (2016) emphasized that soil compaction causes a decrease in Tp, but the decrease in Ma is larger.…”

Section: Soil Bulk Density and Porositymentioning

confidence: 99%

“…This, in part, is driven by the increase in size of the agricultural and forest monoculture areas (BOLDRINI, 2009). The removal of the original vegetation cover, the preparation of the soil for the crops, the overgrazing of vegetation, and the use of fire for pasture renewal has contributed to the degradation of the soils in the Santa Catarina Plateau of southern Brazil (WERNER et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Study of soil physical properties and water infiltration rates in different types of land use

Santos

Barbosa

Bertol

et al. 2018

SCA

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Studying the changes in soil properties caused by different land uses allows measures to be adopted that will reduce the risk of future negative effects. The aim of this study was to evaluate soil physical properties and quantify water infiltration for different types of land use in the Santa Catarina Plateau of southern Brazil. The research was conducted on a 1,200 ha rural property. The land use types selected were natural forest (NF), planted pine (PP), crop-livestock integration (CLI), and burned natural rangeland (BR). A sample survey was carried out in nine different areas for each land use. Samples were collected from four soil layers and the soil bulk density (Bd), total porosity (Tp), and macropore (Ma), micropore (Mi), and biopore (Bio) volumes were measured. Water infiltration tests were performed to obtain the initial (ii) and final (fi) water infiltration rates into the soil, and the total amount of water that had infiltrated the soil (Ti). In NF, Bd was lower and Tp was higher than in other types of land use. The forest vegetation (NF and PP) had higher Ma and Bio volumes in the superficial layers of the soil. Water infiltration was markedly different between land use types. The NF had the highest ii, fi, and Ti values followed by PP, whereas the CLI and BR areas had drastically lower infiltration parameters with BR having the lowest values. The variables ii, fi, and Ti correlated positively with Tp, Ma, and Bio, but negatively with Bd. ResumoO estudo das modificações nos atributos do solo provocadas pela forma de utilização das terras possibilita a adoção de medidas que reduzam riscos de futuros impactos. A pesquisa teve por objetivos quantificar atributos físicos do solo e a infiltração de água em diferentes modalidades de uso da terra no Planalto Sul Catarinense. O estudo foi conduzido em propriedade rural de 1.200 ha, onde foram selecionadas áreas sob floresta natural (FN), plantio de pinus (PP), integração lavoura-pecuária (ILP) e campo natural pastejado e submetido à queima (CN). Para isso, realizou-se levantamento amostral em nove glebas distintas para cada tipo de uso. Foram coletadas amostras de solo em quatro camadas para determinação da densidade do solo (Ds), porosidade total (Pt), macroporos (Ma), microporos (Mi) e bioporos (Bio).Testes de infiltração de água no solo foram realizados para obtenção das taxas de infiltração inicial (ii) e final (if) e da lâmina total infiltrada (It). Na FN a Ds é menor e a Pt maior do que nos demais tipos de uso da terra. A vegetação florestal (FN e PP) se destaca com maiores volumes de Ma e Bio nas camadas superficiais do solo. A infiltração de água apresenta diferenças acentuadas entre os tipos de uso. A FN tem maiores valores de ii, if e It, seguida pelo PP, enquanto CN e ILP tem redução drástica nos parâmetros de infiltração, com menores valores no CN. As variáveis ii, if e It correlacionam-se positivamente com Pt, Ma e Bio e negativamente com Ds. Palavras-chave: Qualidade do solo. Lavoura, pecuária e floresta. Permeabilidade do solo.

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Section: Soil Bulk Density and Porositymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of soil physical properties and water infiltration rates in different types of land use

Santos

Barbosa

Bertol

et al. 2018

SCA

Self Cite

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Interactions among climate, topography, soil structure and rangeland aboveground net primary production

et al. 2022

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Aboveground Net Primary Production (ANPP) of rangeland ecosystems is driven by interactions among multiple environmental factors. This study aimed to model the combined effects of precipitation, elevation, and soil conditions on ANPP variation along an elevation gradient. Ground surveys and vegetation sampling were conducted in 2016 through 26 sampling sites along two elevation profiles in the rangelands of Moghan-Sabalan, Ardabil Province, Iran. At each sampling site, the ANPP of each plant functional type (PFT; grasses, forbs, and shrubs) was measured, and soil samples were taken from 0–15 to 15–30 cm depth. Regression analysis and structural equation modeling (SEM) were used to investigate the factors affecting both total and PFT ANPP. Soil variables were the best predictors of grass (R2 = 0.51), forb (R2 = 0.61), shrub (R2 = 0.71), and total (R2 = 0.76) ANPP. The SEM interpretation suggested that precipitation is the most important direct driver of ANPP with R2 values of 0.20 (Total), 0.30 (Shrubs), 0.26 (Grasses), and 0.10 (Forbs). Whereas soil factors were good predictors in the regression models, the SEM models demonstrated that soil factors were generally unimportant compared with climate, likely owing to the close links between soil-forming factors and climate. The results make it possible to estimate annual ANPP combined with climate forecasts and leads to more accurate estimates of future grazing capacity by policy makers and stakeholders.

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Efeitos no solo e nas culturas após vinte anos de cultivo convencional e semeadura direta

Brown

Barbosa

Bertol

et al. 2018

Agraria

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RESUMO:Com a pesquisa se objetivou avaliar atributos do solo e o desempenho de culturas após 20 anos de condução em dois sistemas de manejo em Cambissolo Húmico no sul do Brasil. Avaliaram-se a semeadura direta (SD) e o preparo convencional (PC) nos cultivos de milho (Zea mays), feijão (Phaseolus vulgaris) e soja (Glycine max), em dois anos agrícolas. Amostras de solo foram coletadas em três camadas ao final do segundo cultivo, enquanto as avaliações das características agronômicas de plantas foram feitas ao final de cada cultivo. A SD reduziu a densidade do solo e aumentou a porosidade total, estabilidade de agregados e grau de floculação da argila, porém diminuiu a macroporosidade na superfície do solo. Na SD, maiores acúmulos de fósforo ocorreram até 0,05 m, cálcio e magnésio até 0,1 m e potássio e carbono orgânico até 0,2 m de profundidade, em relação ao PC e apresentou gradiente de acidificação do solo a partir da superfície. Diferenças no desempenho das culturas ocorreram no segundo ano, constatando-se no PC redução no rendimento de grãos de soja e milho e na massa de mil grãos de feijão em comparação à SD. Os cultivos de feijão e soja produziram baixa quantidade de biomassa de parte aérea, independente do manejo do solo, enquanto o milho produziu alta quantidade e maior biomassa na SD do que no PC. Palavras-chave: conservação do solo; manejo do solo; plantio diretoEffects on soil and crops after 20 years of conventional and zero tillage ABSTRACT: The aim of this research was to evaluate soil properties and performance of crops after 20 years of cultivation in two management systems in a Humic Cambisol in the south of Brazil. No-tillage (NT) and conventional tillage (CT) were evaluated during the cultivation of maize (Zea mays), bean (Phaseolus vulgaris) and soybean (Glycine max), in two years. Soil samples were collected in three layers at the end of the second year, while the determinations of agronomic traits were carried at the end of each year. NT decreased soil bulk density and increased total porosity, aggregate stability and clay flocculation degree, however it decreased macroporosity at the soil surface. In NT higher accumulations of phosphorus occurred up to 0.05 m, calcium and magnesium up to 0.1 m and potassium and organic carbon up to 0.2 m depth compared to CT, and it had a gradient of soil acidification from the surface. Differences in the performance of crops occurred in the second year, being verified in CT a reduction of grain yield of soybean and corn and lower thousand-grain mass of beans compared to NT. Bean and soybean produced low amount of above-ground biomass, independent of soil management, while maize produced high amount and higher biomass in NT than CT.

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Soil Properties and Plant Biomass Production in Natural Rangeland Management Systems

Cited by 3 publications

References 18 publications

Study of soil physical properties and water infiltration rates in different types of land use

Study of soil physical properties and water infiltration rates in different types of land use

Interactions among climate, topography, soil structure and rangeland aboveground net primary production

Efeitos no solo e nas culturas após vinte anos de cultivo convencional e semeadura direta

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