Effects of Pinus caribaea forests on the C, N, P, and S status of Brazilian savanna Oxisols

Lilienfein, Juliane; Wilcke, Wolfgang; Thomas, Richard J.; Vilela, Lourival; Lima, Samuel do Carmo; Zech, Wolfgang

doi:10.1016/s0378-1127(00)00472-2

Cited by 32 publications

(33 citation statements)

References 47 publications

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“…A lower C:N ratio for forest soil compared with savanna soil has been reported in a tropical humid or sub-humid region of southeastern Asia and south America (Lilienfein et al 2001;Yonekura et al 2010). Guillet et al (2001) also observed that the C:N ratio at 0-20 cm soil depth was clearly lower in forest compared with savanna in eastern Cameroon, which is ca.…”

Section: Effect Of Vegetation On Soil C and N Dynamicsmentioning

confidence: 81%

“…In support of this, we found substantial nitrate leaching below 30 cm soil depth in the forest, although little nitrate leaching is observed at the same depth in savanna soil (Shibata et al 2012). Lilienfein et al (2001) also observed much nitrate leaching and high N concentration of soil solution under planted forest, but they found little N leaching in Cerrado in Brazil. As a result, they measured a lower C:N ratio of soil in young planted forest (20 years) than in Cerrado in deeper soil (1.2-2.0 m).…”

Section: Effect Of Vegetation On Soil C and N Dynamicsmentioning

confidence: 95%

“…OM deposition via different vegetation types results in differential OM accumulation and therefore differences in N and P dynamics. Lilienfein et al (2001) showed that afforestation increased total soil C, N and P in the uppermost 2 m compared with Cerrado in Oxisols in Brazil. On the other hand, Chacon and Dezzeo (2004) observed that forest degradation to savanna caused the redistribution of P forms in acidic sandy soils in southern Venezuela.…”

Section: Introductionmentioning

confidence: 99%

“…Although many studies have evaluated the effect of vegetation on soil physicochemical characteristics and on soil C, N, P and other minerals in the humid tropics of southeastern Asia and South America (Lilienfein et al 2001;Imai et al 2010;Yonekura et al 2010), limited information exists for central Africa (Laclau et al 2010;Cleveland et al 2011). To establish sustainable land management for forest conservation and especially for reforestation in the forest-savanna transition zone in the future, as a first step, it is necessary to evaluate the difference of soil physicochemical properties and soil nutrient status between the vegetation in this region, which may control (or prevent) the reforestation of savanna.…”

Section: Introductionmentioning

confidence: 99%

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Effect of vegetation on soil C, N, P and other minerals in Oxisols at the forest-savanna transition zone of central Africa

Sugihara

Shibata

et al. 2014

Soil Science and Plant Nutrition

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The forest-savanna transition zone, which evolves as a result of past climate change, is widely distributed in central Africa. Because nutrient-poor soils (Oxisols) are widely distributed in this area, it is necessary to understand the characteristics of soil nutrients in relation to the vegetation. We collected 52 soil samples from five pits each for two different vegetation types (forest and savanna) in this area and evaluated the effect of vegetation type on soil physicochemical properties [pH, soil texture, cation-exchange capacity, bulk density, crystalline and non-crystalline aluminum (Al) and iron (Fe)] and nutrient status [carbon (C), nitrogen (N), phosphorus (P) and other soil minerals]. We also evaluated the fractionated P. Whereas most physicochemical properties were similar between the two vegetation types throughout the soil profile (0-80 cm depth), clay content, bulk density and soil pH clearly differed between the vegetations at the surface layer (0-10 cm). At 80 cm soil depth, soil C, N and P were 87.9, 7.7 and 3.7 Mg ha −1 , respectively, in forest, and 98.6, 7.1 and 3.1 Mg ha −1 , respectively, in savanna. Although there was no clear difference between the amounts of soil C, N and P, the upper-soil (0-40 cm) C:N ratio was clearly lower in forest (11.0-12.0) compared with savanna (13.0-15.7), because the main plant species in the forest can fix N effectively. We also found a smaller ratio of sodium hydroxide (NaOH)-extractable inorganic P to total soil P in forest compared with savanna. Because the content of crystalline and non-crystalline Al and Fe in forest soil was similar to that of savanna, the different soil C:N ratio would cause different availability of P between the vegetation types, although the mechanism is unclear. These results indicate that savanna vegetation is N-limited and forest vegetation is N-saturated (and possibly P-limited) in this zone. We also found that, at 20 cm soil depth, total soil potassium (K) in forest was 1590 kg ha −1 , which was 930 kg ha −1 less than that in savanna (2520 kg ha −1 ; P < 0.05), although a similar difference was not measured for Na, Ca, and magnesium (Mg). Because we observed lower soil pH in forest, not only plant K uptake but also K leaching loss would contribute to lower soil K in forest.

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Section: Effect Of Vegetation On Soil C and N Dynamicsmentioning

confidence: 81%

Section: Effect Of Vegetation On Soil C and N Dynamicsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of vegetation on soil C, N, P and other minerals in Oxisols at the forest-savanna transition zone of central Africa

Sugihara

Shibata

et al. 2014

Soil Science and Plant Nutrition

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“…Vegetation biomass accumulation has a critical role in maintaining soil fertility and soil physical structure. Some previous research has shown that vegetation biomass is closely related to nutrient accumulation or soil fertility (Lopes and Cox, 1977;Regina, 2000;Hartemink, 2001;Hunter, 2001;Johnson et al, 2001;Lilienfein et al, 2001). For instance, Hunter (2001) analyzed above-ground biomass and nutrient uptake of three tree species (Eucalyptus camaldulensis, Eucalyptus grandis, and Dalbergia sissoo) at three years of age in southern India.…”

Section: Soil Data Analysismentioning

confidence: 99%

Linking Amazonian secondary succession forest growth to soil properties

2002

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The Amazon Basin has suffered extensive deforestation in the past 30 years. Deforestation typically leads to changes in climate, biodiversity, hydrological cycle, and soil degradation. Vegetation succession plays an important role in soil restoration through accumulation of vegetation biomass and improved soil/plant interaction. However, relationships between succession and soil properties are not well known. For example, how does vegetation succession affect nutrient accumulation? Which soil factors are important in influencing vegetation growth? What is the best way to evaluate soil fertility in the Amazon basin? This paper focuses on the interrelationships between secondary succession and soil properties. Field soil sample data and vegetation inventory data were collected in two regions of Brazilian Amazonia (Altamira and Bragantina). Soil nutrients and texture were analyzed at successional forest sites. Multiple regression models were used to identify the important soil properties affecting vegetation growth, and a soil evaluation factor (SEF) was developed for evaluating soil fertility in Alfisols, Ultisols, and Oxisols, which differ in the ways they affect vegetation growth. For example, the upper 40 cm of soil is most important for vegetation growth in Alfisols, but in Ultisols and Oxisols deeper horizons significantly influence vegetation growth rates. Accumulation of vegetation biomass increased soil fertility and improved soil physical structure in Alfisols but did not completely compensate for the nutrient losses in Ultisols and Oxisols; however, it significantly reduced the rate of nutrient loss.

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The Brazilian Cerrado: assessment of water and soil degradation in catchments under intensive agricultural use

et al. 2014

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The Brazilian Cerrado is recognized as one of the most threatened biomes in the world, as the region has experienced a striking change from natural Cerrado vegetation to intense cash crop production. This paper reviews the history of land conversion in the Cerrado and the development of soil properties and water resources under past and ongoing land use. We compared soil and water quality parameters from different land uses considering 80 soil and 18 water studies conducted in different regions across the Cerrado to provide quantitative evidence of soil and water alterations from land use change. Following the conversion of native Cerrado, significant effects on soil pH, bulk density and available P and K for croplands and less-pronounced effects on pastures were evident. Soil total N did not differ between land uses because most of the sites classified as croplands were nitrogen-fixing soybeans, which are not artificially fertilized with N. In contrast, water quality studies showed nitrogen enrichment in agricultural catchments, indicating fertilizer impacts and potential susceptibility to eutrophication. Regardless of the land use, P is widely absent because of the high-fixing capacities of deeply weathered soils and the filtering capacity of riparian vegetation. Pesticides, however, were consistently detected throughout the entire aquatic system. In several case studies, extremely high-peak concentrations exceeded Brazilian and European Union (EU) water quality limits, which were potentially accompanied by serious health implications. Land use intensification is likely to continue, particularly in regions where less annual rainfall and severe droughts are projected in the northeastern and western Cerrado. Thus, the leaching risk and displacement of agrochemicals are expected to increase, particularly because the current legislation has caused a reduction in riparian vegetation. We conclude that land use intensification is likely to seriously limit the Cerrado's future regarding both agricultural productivity and ecosystem stability. Because only limited data are available, we recommend further field studies to understand the interaction between terrestrial and aquatic systems. This study may serve as a valuable database for integrated modelling to investigate the impact of land use and climate change on soil and water resources and to test and develop mitigation measures for the Cerrado.

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Effects of Pinus caribaea forests on the C, N, P, and S status of Brazilian savanna Oxisols

Cited by 32 publications

References 47 publications

Effect of vegetation on soil C, N, P and other minerals in Oxisols at the forest-savanna transition zone of central Africa

Effect of vegetation on soil C, N, P and other minerals in Oxisols at the forest-savanna transition zone of central Africa

Linking Amazonian secondary succession forest growth to soil properties

The Brazilian Cerrado: assessment of water and soil degradation in catchments under intensive agricultural use

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