Soil phosphorus distribution in sequentially extracted fractions in tropical coffee-agroecosystems in the Atlantic Forest biome, Southeastern Brazil

Xavier, F. A. da S.; Almeida, Everson F.; Cardoso, Irene Maria; Mendonça, Eduardo de Sá

doi:10.1007/s10705-010-9373-5

Cited by 31 publications

(17 citation statements)

References 30 publications

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“…This proportion of Po is within the range found in tropical regions for several soil orders (from low to medium content of organic C) and land-use systems, with average values of total Po from 26% [9,35,36] to 31% [11,19,37]. Oliveira et al [38] found proportions of total Po ranging from 36% to 46% for soils with high contents of organic matter, a conclusion that supports these findings.…”

Section: Distribution Of Organic and Inorganic P Fractionssupporting

confidence: 70%

Labile and Non-Labile Fractions of Phosphorus and Its Transformations in Soil under Eucalyptus Plantations, Brazil

Costa

Gama-Rodrigues

Gonçalves

et al. 2016

Forests

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Phosphorus (P) is the main limiting nutritional factor in the cultivation of Eucalyptus in Brazil. Despite this, little is known about the P fractions and dynamics in Eucalyptus soils in tropical regions. The aims of this study were (1) to evaluate the distribution of labile and non-labile fractions of P in soil in 10 sites of Eucalyptus in the state of São Paulo, Brazil and (2) to determine the interactions among the P fractions and to identify which fractions act as sinks or sources for the available P fraction. The P fractions were separated using the Hedley sequential extraction method, and the P transformation processes were evaluated via structural equation modeling. The labile P (resin-Pi + Pi and Po in NaHCO 3 ) varied between 6% and 16%, the moderately labile P (Pi + Po in NaOH) varied between 28% and 40%, the occluded P (Pi + Po in Sonicate + NaOH) varied between 6% and 19%, the P associated with Ca (HCl-Pi) varied between 0.4% and 3% and the residual-P varied between 35% and 47%. The hypothetical structural model of soil P cycle was composed of four P pools (latent variables): the organic pool, occluded pool, inorganic pool, and available pool. The structural model was adequate to identify functional pools of P in soil, and to identify transformation processes of P based on the source-sink relationships. The available P pool was highly dependent on inorganic and occluded pools and the organic pool acted predominantly as a sink of P on available and inorganic pools. The results reinforce the high level of recalcitrance of the organic pool and the fact that Eucalyptus plants must access pools of limited-availability P to meet their nutritional demands.

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Section: Distribution Of Organic and Inorganic P Fractionssupporting

confidence: 70%

Labile and Non-Labile Fractions of Phosphorus and Its Transformations in Soil under Eucalyptus Plantations, Brazil

Costa

Gama-Rodrigues

Gonçalves

et al. 2016

Forests

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“…It is possible that the ignition method underestimated total P, although it yielded similar total P concentrations in a range of soils from central Panama to the H 2 O 2 -H 2 SO 4 procedure used here to determine residual P (Turner and Engelbrecht 2011). Here, the HCl strong fraction was a much larger percentage of occluded P (HCl strong P plus residual P = 88% of the total P in surface soil) than the values of 36-55% reported for other strongly weathered soils (Lilienfein et al 2000;Xavier et al 2011). We therefore suspect that the HCl strong extract overestimated P in that fraction.…”

Section: Differences Among Fractionsmentioning

confidence: 47%

Soil phosphorus responses to chronic nutrient fertilisation and seasonal drought in a humid lowland forest, Panama

et al. 2013

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Abstract. We used the Hedley sequential fractionation scheme to assess phosphorus (P) chemistry of a strongly weathered soil from a humid lowland forest in Panama. Our analyses were part of a factorial experiment of nitrogen, P, and potassium addition, with nutrients added annually, i.e. a chronic input. The aim was to examine changes in soil P chemistry with 7 years of nutrient addition for soils collected in the wet season and the dry season. The majority of P occurred in fractions extracted by NaOH (24% of the total soil P) and hot concentrated HCl (58% of the total). Organic P (P o ) was~54% of extractable P. Labile P, defined as P o plus inorganic P (P i ) extracted by NaHCO 3 , was largely P o (84% of the NaHCO 3 -extractable P). Chronic P addition increased NaHCO 3 -extractable P o several-fold and NaOH-extractable P i two-fold. Seasonal variation occurred for labile P and NaOH-extractable P, whereas occluded P did not vary throughout the study period. Extractable P was~15% higher in surface than subsurface soil. We added 350 kg P ha -1 during the 7-year period and recovered~55% by sequential extraction. According to biogeochemical theory, added P should show up in fractions with the shortest residence times, e.g. labile P. Our finding that added P accumulated in fractions with presumably long residence times, i.e. extracted by NaOH (bound) and hot concentrated HCl (occluded), suggests that greater attention be paid to the short-term dynamics of bound and occluded P in strongly weathered tropical forest soils.

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“…Phosphorus, the second most widely limiting nutrient in soil after nitrogen (Balemi and Negisho 2012), is a critical macronutrient for plant growth; and in tropical agroecosystems soil, P deficiency is a major limitation to crop production (Mustonen et al 2012). Research report indicate that <1 % of soil P is available for plant uptake (Stewart and Tiessen 1987) as a result of strong adsorption of phosphate by iron and aluminium oxides (Xavier et al 2011). According to Sharma et al (2011), phosphorus has a significant role in sustaining and building up soil fertility, especially under intensive system of agriculture.…”

Section: Introductionmentioning

confidence: 99%

The effect of phosphorus and nitrogen fertilizers on grain yield, nutrient uptake and use efficiency of two maize (Zea mays L.) varieties under rain fed condition on Haplic Lixisol in the forest-savannah transition zone of Ghana

Fosu-Mensah

Mensah

2016

Environ Syst Res

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Background: Low soil fertility is recognized as the major constraint to food production and food security in Ghana. An important practice that restores some level of fertility is long fallow, however this is no longer practiced due to increased pressure on land for other purposes. This has resulted in decline in crop yields in areas (forest-savannah transition zone or Sub-humid Ghana) which are known to be one of the major food baskets for the country. The soils are generally poor and require mineral fertilizer to increase crop productivity. In order to increase food production and crop productivity, the use of mineral fertilizer is required other than the expansion of arable land. The aim of this paper is to assess the influence of Phosphorus and Nitrogen fertilizers on the yield of two maize varieties and nutrient use efficiency in the forest-savannah transition zone of Ghana. Methods:Experimental data from two maize varieties (Zea mays L.) grown under four concentrations of nitrogen (N) and three concentrations of phosphorus (P) in the 2008 major and minor seasons at two sites in Ejura, Ghana, were used to assess the influence of P and N on the yield, nutrient uptake and use efficiency in the forest-savannah transition zone of Ghana.Results: Analysis of variance showed a statistically significant effect of N and P on grain yield, total biomass, grain N uptake and apparent N recovery. Increasing N concentration significantly increased grain yield, grain N uptake and total dry matter production irrespective of application of P fertilizer. The application of P fertilizer increased N use efficiency with grain yield ranging from 918 (control) to 4953 kg ha −1 (N4P2) and 824 (control) to 4267 kg ha −1 (N4P2) for Obatanpa and Dorke maize, respectively. The two cultivars were significantly different from each other with higher grain yield produced by Obatanpa than Dorke. The application of inorganic P fertilizer increased the efficient utilization of inorganic N fertilizer by the plants in grain yield and total biomass production. Hence, P nutrition of soils is critical for the efficient use of inorganic N fertilizer in the area. Conclusions:Inorganic fertilizer use in the study area was agronomically efficient, though generally more efficient at the Ejura farm site (Experiment 1 and 3) than the Agricultural College site (Experiment 2 and 4). Owing to the spatial variability in soil nutrients in the study area, site-specific fertilizer testing is needed to increase nutrient use efficiency and crop productivity. To improve the rate of fertilizer adoption and use by farmers, the government should subsidize the cost of fertilizer to make it affordable for farmers to purchase to increase crop productivity.

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Soil phosphorus distribution in sequentially extracted fractions in tropical coffee-agroecosystems in the Atlantic Forest biome, Southeastern Brazil

Cited by 31 publications

References 30 publications

Labile and Non-Labile Fractions of Phosphorus and Its Transformations in Soil under Eucalyptus Plantations, Brazil

Labile and Non-Labile Fractions of Phosphorus and Its Transformations in Soil under Eucalyptus Plantations, Brazil

Soil phosphorus responses to chronic nutrient fertilisation and seasonal drought in a humid lowland forest, Panama

The effect of phosphorus and nitrogen fertilizers on grain yield, nutrient uptake and use efficiency of two maize (Zea mays L.) varieties under rain fed condition on Haplic Lixisol in the forest-savannah transition zone of Ghana

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