Phosphorous status and adsorption characteristics of acid soils from Cheha and Dinsho districts, southern highlands of Ethiopia

Ayenew, Bereket; Tadesse, Abi; Kibret, Kibebew; Melese, Asmare

doi:10.1186/s40068-018-0121-1

Cited by 21 publications

(36 citation statements)

References 62 publications

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“…Levels of TOC, TN, Pav, Kav, Caav, Mgav, Mnav and Feav were surprisingly high inside the enset gardens, much higher than typical values reported in literature (Ayenew et al, 2018;Elias;2017;Hengl et al, 2017;Mamo et al, 2014;Mamo et al, 2002;Moges and Holden, 2008;Nabhan et al, 1999;Roy et al, 2006). The pH measured in the enset gardens is comparable to the optimum range suggested for enset, i.e.…”

Section: Soil Fertility In Relation To Agro-ecology and Management Prcontrasting

confidence: 46%

The soil fertility and leaf nutrient status in enset gardens in different altitude zones of the Gamo highlands, Ethiopia and inferences for Xanthomonas wilt prevalence

Shara

Swennen

Deckers

et al. 2019

Preprint

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Abstract. Enset (Ensete ventricosum) is a productive, drought-tolerant and multipurpose food security crop grown in the densely populated Ethiopian highlands. Its production suffers from poor soil fertility management and a bacterial wilt disease caused by the pathogen Xanthomonas campestris pv. musacearum. The aim of this study was to assess soil-plant-nutrient variation within enset home gardens over three different altitudes (ranging from 2000–3000 masl) in the Chencha catchment of the Gamo highlands and investigate whether this variation affects disease prevalence. Plant available P, Ca and Mg significantly increase with decreasing elevation but significantly decline with distance from the house. In addition, soil pH, conductivity, total organic carbon (TOC), total N, available K, Mn and Fe levels significantly decline with distance from the house. This indicates that soil fertility factors are influenced by both agro-ecology and farmers' management practices. Moreover, most nutrients reach very high levels in the garden whereas the more distant outfields are severely nutrient deprived. Plant nutrient levels are not correlated to soil nutrient levels except for N. Twenty two percent of the studied farms are symptomatic for bacterial wilt and its prevalence increases with decreasing elevation. Symptomatic gardens have a higher soil pH and available P, K and Ca levels. We conclude that soil fertility management in enset gardens should be optimized in relation to agro-ecological conditions and that both elevation and soil nutrient status need to be considered when developing strategies to curb the current Xanthomonas wilt epidemic.

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Section: Soil Fertility In Relation To Agro-ecology and Management Prcontrasting

confidence: 46%

The soil fertility and leaf nutrient status in enset gardens in different altitude zones of the Gamo highlands, Ethiopia and inferences for Xanthomonas wilt prevalence

Shara

Swennen

Deckers

et al. 2019

Preprint

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“…Soil solution P at the level of 0.2 mg P L −1 is sufficient for optimum yield (Naeem et al 2013;Mihoub et al 2019). Mihoub et al (2016) and Ayenew et al (2018) reported that several crops achieved maximum growth at 0.2 and 0.32 mg P L −1 , respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Soil solution P at the level of 0.2 mg P L −1 was sufficient for optimum yield (Mihoub et al 2019;Naeem et al 2013). Ayenew et al (2018) reported that several crops achieve maximum growth at 0.2 and 0.32 mg P L −1 . Mehdi et al (2007) proposed 0.252 mg P L −1 soil solution as optimum P level for wheat production.…”

Section: Discussionmentioning

confidence: 99%

“…Calcareous soils of Pakistan need 0.32 mg P L −1 soil solution to increase the yield up to 95% (Hussain et al 2007). Plants show normal growth as well as maximum P uptake at 0.2 mg P L −1 soil solution level (Ayenew et al 2018;Mihoub et al 2019). Chaudhry et al (2003 reported that 22-67 mg P kg −1 is sufficient to maintain 0.2 mg P L −1 in soil solution and also for maximum maize yield.…”

Section: Discussionmentioning

confidence: 99%

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Optimizing Phosphorus Levels in Wheat Grown in a Calcareous Soil with the Use of Adsorption Isotherm Models

Saeed

Jamal

Muhammad

et al. 2020

J Soil Sci Plant Nutr

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Crop response to phosphorous (P) application is often erratic in most soil types in the world. In alkaline calcareous soils, P retention and mobilization take place due to precipitation and adsorption. P adsorption isotherms are the powerful tools for assessing optimum P levels for different crops and soils. Laboratory and field studies were carried out to evaluate P sorption capacity in a highly calcareous soil and corresponding fertilizer levels for yielding 0.1 to 1.0 mg P L −1 of soil solution. Although Freundlich adsorption isotherm model showed a better fit than Langmuir model, P fertilizer levels used in the field, ranging from 20 to 150 kg P 2 O 5 ha −1 , were based on Langmuir model to yield the estimated P solution. Moreover, nitrogen (N) and potassium (K) were applied at the rates of 120 and 60 kg ha −1 as urea and potassium sulfate (K 2 SO 4), respectively, in a basal treatment at the time of sowing. Grains per spike, 1000-grain weight, grain yield, spike length, and biological yield were increased as the level of P increased, but the non-significant differences among 90, 100, and 120 kg P 2 O 5 ha −1 for most of the above parameters suggested that the former rate could be the maximum level for wheat fertilization in the calcareous soil. Similarly, plant N, P, and K were increased with application of P, but non-significant differences were observed from doses 90 to 120 kg P 2 O 5 ha −1. Moreover, the rate of 90 kg P 2 O 5 ha −1 could yield 0.6 mg P L −1 of soil solution as per Langmuir adsorption isotherm model, while as per Freundlich model, this value could reach only 0.3-0.4 mg P L −1 , which is close to the published literature. It is concluded that Freundlich adsorption isotherm is more suitable to be used for the calculation of phosphatic fertilizer rate and its adsorption capacity in the given soil than Langmuir adsorption isotherm.

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“…The adsorption curves provide an adequate basis for estimation of P requirements across a diversity of soils and environment at constant temperature and pressure (Islam, 2014 andKruse et al, 2015). However, limited work has been carried out to evaluate the relationship between the P adsorption capacity and specific soil properties in the research areas and generally in Ethiopia (Chimdi et al, 2013;(Wogi et al, 2015;Haile andWolde, 2015 andAyenew et al, 2018). Thus, the objectives of this study were: (i) to quantify P adsorbed and compare the applicability of Langmuir and Freundlich equations in describing the adsorption of P in acidic soils of Tsegede highlands and (ii) to evaluate the relationships between P adsorption properties of the acidic soils across Tsegede highlands.…”

Section: Introductionmentioning

confidence: 99%

The Effect of pH on Phosphorus Adsorption in Acidic Soils of Tsegede, Western Zone of Tigray, Ethiopia

Tareke¹,

Woldetensai²,

Birhane³

2020

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Background: Although soils in the acidic soils of Tsegede (Skeletic Leptosols, Cambic Leptosols, Leptic Cambisols and Dystric Cambisols) are characterized by low available P contents, study on P adsorption characteristics is limited information. The purpose of this experiment was to evaluate P adsorption characteristics in different acidity ranges of soils. Material and method: Potassium dihydrogen phosphate (KH2PO4) was used for the adsorption isotherm studies by duplicating 3 g soil from each soil types at different acidity ranges of ten soil samples with 50 ml of P in 0.01 M CaCl2 solution having 0, 20, 40, 60, 80,100 mg P L-1. Langmuir and Freundlich adsorption isotherm models were used to describe adsorption processes and the relationships between P adsorption and soil properties were determined by correlation. Results: Phosphorus adsorption increased significantly with increasing P levels and it increased as soil pH declines. The maximum and minimum P-adsorptions were obtained from very strongly acidic Skeletic Leptosols and from moderately acidic Dystric Cambisols, respectively. Comparing the two models, Langmuir linear model showed a better fit to the tested soils compared to Freundlich model. The regression coefficients (R2) for the fitted Langmuir P adsorption isotherms were highly significant ranging from (0.955 to 0.999) and the adsorption maxima obtained from the Langmuir isotherm ranged from 357 mg P kg-1 soil in strongly acidic Dystric Cambisols to 2500 mg P kg-1 soil in very strongly acidic Skeletic Leptosols. The bonding energy (k) for Langmuir adsorption model varied from 0.012 to 2.8 L mg-1 and both the highest (2.8 L mg-1) and lowest (0.012 L mg-1) k values were obtained from strongly and moderately acidic Dystric Cambisols. The cation exchange capacity (CEC) and organic carbon (OC) were positively correlated with the Langmuir adsorption maxima (b) and negatively correlated with available P and soil pH. Conclusion: Increments of soil pH using different amendments and their proper management in soils are important in making productive use and higher dose of P is required by soils with higher fixation. Alternative P management strategies are also needed to reduce P adsorption and enhance P availability in such acidic soils in the study areas.

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Phosphorous status and adsorption characteristics of acid soils from Cheha and Dinsho districts, southern highlands of Ethiopia

Cited by 21 publications

References 62 publications

The soil fertility and leaf nutrient status in enset gardens in different altitude zones of the Gamo highlands, Ethiopia and inferences for Xanthomonas wilt prevalence

The soil fertility and leaf nutrient status in enset gardens in different altitude zones of the Gamo highlands, Ethiopia and inferences for Xanthomonas wilt prevalence

Optimizing Phosphorus Levels in Wheat Grown in a Calcareous Soil with the Use of Adsorption Isotherm Models

The Effect of pH on Phosphorus Adsorption in Acidic Soils of Tsegede, Western Zone of Tigray, Ethiopia

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Phosphorous status and adsorption characteristics of acid soils from Cheha and Dinsho districts, southern highlands of Ethiopia

Cited by 21 publications

References 62 publications

The soil fertility and leaf nutrient status in enset gardens in different altitude zones of the Gamo highlands, Ethiopia and inferences for Xanthomonas wilt prevalence

The soil fertility and leaf nutrient status in enset gardens in different altitude zones of the Gamo highlands, Ethiopia and inferences for Xanthomonas wilt prevalence

Optimizing Phosphorus Levels in Wheat Grown in a Calcareous Soil with the Use of Adsorption Isotherm Models

The Effect of pH&nbsp;on Phosphorus Adsorption in Acidic Soils of Tsegede, Western Zone of Tigray, Ethiopia

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The Effect of pH on Phosphorus Adsorption in Acidic Soils of Tsegede, Western Zone of Tigray, Ethiopia