Biogeochemistry and cycling of zinc and copper in a dyked seasonally flooded savanna

López‐Hernández, Danilo

doi:10.1080/02757540802491320

Cited by 6 publications

(4 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fires affect this role and resilience to fire has been demonstrated by Parr and Andersen (2008) in northern Australia, and by Sousa-Souto et al (2008) in Brazil. Similarly, termites have a major influence on nutrient availability and on physical transfer of mineral components within the soil, as shown in a study of abundance and diversity in tropical Australia (Dawes-Gromadzki, 2008) or by Obi and Ogunkunle (2009) -Hernandez, 2008). At a landscape scale, the debate between conservationists and developers is exemplified by research in the Brazilian cerrados, where a prodigious research output on natural and replacement land systems has been carried out over the past few decades.…”

Section: Soils and Soil-plant Communities In Savannasmentioning

confidence: 97%

“…Large areas of Colombia, Bolivia, Venezuela and Peru have similar issues. Whereas most of the problems of adverse soils for exotic plants/agricultural crops have been tackled, there is still an obstacle in micronutrient deficiencies in soil (eg, Fageria and Stone, 2008), although flooded soils are able to accumulate micronutrients through their organic and inorganic complexes (Lopez-Hernandez, 2008).…”

Section: South Americamentioning

confidence: 99%

See 1 more Smart Citation

Tropical savannas: Biomass, plant ecology, and the role of fire and soil on vegetation

Furley

2010

Progress in Physical Geography: Earth and Environment

View full text Add to dashboard Cite

Four major themes can be identified over the period 2008—2009: (1) the increasing use, sophistication and resolution of remote sensing techniques and the application of these methods to assessment of biomass, C-balance and biosphere-atmosphere interactions; (2) continued interest in dynamic change processes affecting individual species and plant communities, and the changing proportions of tree, shrub and herbaceous components; (3) the nature, impact and management of fire; and (4) increasing awareness of the importance of soils and soil moisture in shaping the nature and distribution of vegetation, particularly at local scales.

show abstract

Section: Soils and Soil-plant Communities In Savannasmentioning

confidence: 97%

Section: South Americamentioning

confidence: 99%

Tropical savannas: Biomass, plant ecology, and the role of fire and soil on vegetation

Furley

2010

Progress in Physical Geography: Earth and Environment

View full text Add to dashboard Cite

show abstract

“…In the rest of Venezuela, precipitation is fairly acid (5.1-5.8) (Montes and San Jose, 1987;Lopez-Hernandez, 2008).…”

Section: Discussionmentioning

confidence: 99%

Phosphorus Biogeochemical Cycling in a Sugar Cane Agroecosystem

AMJAD¹

2012

American Journal of Agricultural and Biological Sciences

View full text Add to dashboard Cite

The annual harvest of sugarcane plantations together with the burning of the crop before harvest, a common practice of management of sugarcane plantations in South America, leads to the loss of significant amounts of nutrients in those agroecosystems. Thus prescribed burning operations could progressively diminish the level of soil organic matter and increase nutrient deficiency in soils of sugar cane agrosystems. This study is an attempt to quantify the P distribution during the period of growth in a plantation of sugar cane (Saccharum officinarum) located near San Felipe, Yaracuy State, Central, Venezuela focusing on processes related to the cycling of the element as affected by burning operations. The work was performed in 4.5 ha experimental plots planted with the varieties Puerto Rico (PR) 1028 and Venezuela (V) 58-4. The principal flows of phosphorus, as well the quantities of this element in the soil-plant components were measured throughout the growing cycle of the crop (third ratoon). The inputs through precipitation (wet and dry) were high, that was associated with the intense agricultural (prescribed burning) and industrial activities occurring in the area. The annual balance for both varieties was negative (-17.31 and -23.63 kg ha -1 for V 58-4 and PR 1028, respectively). The negative budget is mainly due to the important amounts of P that are exported with the cane stems. The losses must be compensated through fertilization; nonetheless, preliminary results indicated no response to P dressing, suggesting that in the studied mollisols the internal processes e.g., Organic-P (Po) mineralization and P solubilization efficiently operate generating important available P levels. It was also found that the burning of the sugar cane plantation plays an important role in the recycling of phosphorus, since 25-28 % of the P requirements of the varieties are reincorporated into the soil from the ashes coming as bulk deposition.

show abstract

“…In the rest of Venezuela, even in the absence of anthropogenic influence, precipitation is fairly acid (5.1-5.8) (Montes et al, 1987, López-Hernández 2008.…”

Section: The Ph and Base Cation Concentrations Of Rainwatermentioning

confidence: 99%

Sugar cane nutrient requirements and the role of atmospheric deposition supplying supplementary fertilization in a Venezuelan sugar cane plantation

Hernández¹,

Sequera²,

Vallejo³

et al. 2013

Atmósfera

View full text Add to dashboard Cite

RESUMENLa región centro norte de Venezuela está caracterizada por lluvias de naturaleza ácida, cargadas de contaminantes que incluyen nutrientes, debido a la intensa actividad industrial y agrícola de la zona. Esta región presenta a su vez grandes extensiones de plantaciones de caña de azúcar. Una vez que la lluvia pasa por el dosel de bosques o de ecosistemas agrícolas, su composición química cambia, ya sea por absorción, lixiviación o lavado de iones depositados en el dosel. Este documento describe los cambios en la química de las aguas de lluvias después de pasar por el dosel de una plantación de caña de azúcar. En cuatro parcelas de 300 m 2 ubicadas en un área experimental de 4.5 ha, plantadas con Saccharum officinarum, se instalaron colectores de agua de lluvia y de escurrimiento foliar. El estudio corresponde al análisis de crecimiento de la tercera soca del cultivo. El pH del agua de lluvia se incrementa cuando pasa por el dosel. La magnitud de los cambios fue importante y se relacionó parcialmente con las cantidades significativas de cationes que se lavan del dosel. Las entradas de N en el agroecosistema fueron altas (25.25 kg ha 1 a -1 ) como consecuencia de la fertilización y quema local de la caña antes de su cosecha y la actividad industrial (petroquímica y fertilizantes) desarrollada en la zona. Las precipitaciones (húmeda y seca) representan una importante fuente de entradas de nutrientes a la plantación. En el caso de los macronutrientes (N, P y K) las entradas fueron altas y suplen una significativa fracción de los requerimientos del cultivo, lo mismo ocurre en el caso del zinc y del cobre. ABSTRACTAs a consequence of high industrial and agricultural activities, acidic rains loaded with pollutants-including nutrients-are characteristic of northern central Venezuela, a region dominated by sugar cane plantations. Canopies of forest and agricultural crops can modify the chemistry of rainfall through uptake, leaching and outwash of deposited ions. This paper describes the change in the chemistry of acid rains after passing through a sugar cane canopy. Four plots of 300 m 2 within a 4.5 ha experimental area, planted with Saccharum officinarum had rain and throughfall collectors installed. The study corresponds to the analysis of the growing season of the third ratoon. The pH of the rain in the agroecosystem increased after passing through the canopy. The magnitudes of the changes were important and partially related to the significant amount of cations leached from the leaves or washed out from dry deposition to the leaves. N inputs for wet and dry deposition in the agroecosystem were high (25.25 kg ha -1 yr -1 ) as a consequence of the agricultural activity in the area, the local burning of sugar cane before cropping, and the location of the experimental area close Atmósfera 26(3), 337-348 (2013) 338 D. López-Hernández et al. to petrochemical and fertilizer industries. Rainfall constitutes an important source of nutrient inputs to the sugar cane system. In the case of macronutrients (N, P and K...

show abstract

Biogeochemistry and cycling of zinc and copper in a dyked seasonally flooded savanna

Cited by 6 publications

References 19 publications

Tropical savannas: Biomass, plant ecology, and the role of fire and soil on vegetation

Tropical savannas: Biomass, plant ecology, and the role of fire and soil on vegetation

Phosphorus Biogeochemical Cycling in a Sugar Cane Agroecosystem

Sugar cane nutrient requirements and the role of atmospheric deposition supplying supplementary fertilization in a Venezuelan sugar cane plantation

Contact Info

Product

Resources

About