Soil and Leaf Micronutrient Composition in Contrasting Habitats in Podzolized Sands of the Amazon Region

Sobrado, M. A.

doi:10.4236/ajps.2013.410235

Cited by 6 publications

(7 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ex Nees) Mez (Lauraceae). Subsequently, the data collected were compared with similar data from species occupying the Amazon caatinga toposequence on podzolized sands [16]. Details regarding the ecophysiology of species growing in both types of forest as previously published are presented in Table 1 [13] [17]- [21].…”

Section: Tree Speciesmentioning

confidence: 99%

“…Data for the mixed forest species are expressed as means ± SE. Range values in the adjacent Amazon caatinga toposequence were taken from a previous report [16]. Parameters are expressed as means ± SE.…”

Section: Leaf Analysismentioning

confidence: 99%

“…Statistically significant differences between the means of both species in the mixed forest are denoted as * (p < 0.05) and ** (p < 0.01). The range of leaf nutrients in the adjacent Amazon caatinga toposequence species was taken from a previous report [16].…”

Section: Leaf Analysismentioning

confidence: 99%

“…Firstly, the nutrient composition within the oxisol soil and leaf tissues of two top canopy tree species from the mixed forests was determined. We then analyzed the relationship between leaf micronutrient composition with N and P levels in two species residing in the mixed forest as well as species inhabiting the Amazon caatinga [16]. This approach allowed us to test the hypothesis that leaf micronutrient levels would be coupled to the macronutrient levels, particularly N and P, in order to maintain the balance between nutrients under environmental conditions characterized by either deficient or toxic levels of micronutrients.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Relationship between Leaf Micro- and Macro-Nutrients in Top Canopy Trees in a Mixed Forest in the Upper Rio Negro in the Amazon Region

Sobrado

2014

AJPS

View full text Add to dashboard Cite

The mixed forests of the upper Rio Negro at the northern of the Amazon basin grow in oxisol soils that are extremely infertile. These areas exhibit deficiencies in several macro-nutrients, and may also be characterized by the shortage or toxic excess of some micronutrients. The overall goal of this research is to collect more comprehensive information regarding the micronutrient composition of the upper Rio Negro forests as well as discern the relationship between leaf micro-and macro-nutrients that may contribute to the homeostasis and balance of the ionome. Firstly, the nutrient composition within the oxisol soil and leaf tissues of two top canopy tree species from the mixed forests was determined. We then analyzed the relationship between leaf micronutrient composition with N and P levels of the two species and that of species inhabiting the Amazon caatinga. Extractable soil Zn, B, Mn and Cu were very low in the mixed forest. In contrast, Fe and Al levels were potentially toxic. The analysis of leaf N/P ratios revealed for the first time the co-limitation of N and P in the mixed forest. This contrasts with species from the adjacent Amazon caatinga toposequence that are characterized by strong N limitation. All micronutrients within leaves of species inhabiting the mixed forest were also found to have low concentrations. Moreover, Fe and Al were detected at concentrations well below those reported for accumulator species. This suggested that leaf ion homeostasis was maintained under potentially toxic soil Fe and Al conditions. Leaf micronutrient (Fe, Zn and B) contents mirrored that of leaf N and P contents, and comparable Fe/N, Fe/P, Zn/N, Zn/P, B/N as well as B/P ratios were found across species and forest types. Therefore, forest species exhibited the capability to maintain leaf nutrient balances under soil conditions with deficient or toxic levels of micronutrients.

show abstract

Section: Tree Speciesmentioning

confidence: 99%

Section: Leaf Analysismentioning

confidence: 99%

Section: Leaf Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Relationship between Leaf Micro- and Macro-Nutrients in Top Canopy Trees in a Mixed Forest in the Upper Rio Negro in the Amazon Region

Sobrado

2014

AJPS

View full text Add to dashboard Cite

show abstract

“…Plants obtain their nutrients directly from the soil substratum on which they grow [2,4]. Soil-plant nutrient interaction is thus vital for plant performance and has a direct bearing on effects related to deficiency and toxicity to plants as well as secondary consumers including humans [9,10,11]. Micronutrients are essential plant nutrients, although needed by plants in minute quantities without which they may not be able to complete their life cycles [12,13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Topographic Position and Seasons on the Micronutrient Levels in Soils and Grown Huckleberry (<i>Solanum scabrum) </i>in Bafut (North-West Cameroon)

Tamfuh¹,

Tsozué²,

Tita³

et al. 2017

WJAR

View full text Add to dashboard Cite

Although topography and climate are known to affect soil micronutrient mobility, some related aspects like micronutrient bioavailability to plants and implications to human intake are not fully understood. This paper aimed to study the effects of different topographic positions and seasons (dry or humid) on micronutrient levels in soils and Solanum scabrum. A randomized complete block design with four replications was adopted for each topographic position. Fieldwork was completed by a battery of soil and vegetable analyses. The main results revealed that soil micronutrient levels appeared as follows: Al>Fe>Mn>Zn>Cu for all positions and seasons. The soil micronutrient levels were lowest for the midslope in relation to its steeper gradient that affects downwards migration of matter. Zn and Cu were below the recommended range for agricultural soils, while Al was far above in relation to the strongly acidic pH. In S. scabrum, micronutrients appeared as Mn>Fe>Zn>Al>Cu. Globally, vegetable metal levels were higher in the dry season for all positions. Except Al, all metals were below permissible and toxicity levels in food, while only Fe, Mn and Zn where above recommended range for normal plant growth. Metal transfer factors, apart from midslope, were higher in the dry season. Only Mn and Zn for all positions and seasons as well as Zn at footslope, were above 1. Globally, micronutrient levels in soils and vegetables were higher in the dry seasons for all positions. Micronutrient intake rates were higher in the dry season for all positions but lowest in the midslope for all seasons. Except Fe and Zn in adults, metal levels were above the recommended daily dietary intake indicating excess micronutrients intake by the inhabitants. Overall, a combination of steep slope and humid season reduces soil micronutrient level, limit uptake by vegetables and hence reduce mean daily intake in humans.

show abstract

White-Sand Ecosystems in the Amazon Region: Location, Distinctive Features, Ecology. A Review

Montero

2023

Ecological Studies

View full text Add to dashboard Cite

Soil and Leaf Micronutrient Composition in Contrasting Habitats in Podzolized Sands of the Amazon Region

Cited by 6 publications

References 30 publications

Relationship between Leaf Micro- and Macro-Nutrients in Top Canopy Trees in a Mixed Forest in the Upper Rio Negro in the Amazon Region

Relationship between Leaf Micro- and Macro-Nutrients in Top Canopy Trees in a Mixed Forest in the Upper Rio Negro in the Amazon Region

Effect of Topographic Position and Seasons on the Micronutrient Levels in Soils and Grown Huckleberry (<i>Solanum scabrum) </i>in Bafut (North-West Cameroon)

White-Sand Ecosystems in the Amazon Region: Location, Distinctive Features, Ecology. A Review

Contact Info

Product

Resources

About