scholarly journals Composting coffee pulp with Minjingu phosphate rock improves phosphorus availability for tomato uptake

2019 ◽  
Vol 14 (25) ◽  
pp. 1051-1057
Author(s):  
J. Shitindi Mawazo ◽  
P. Mrema Jerome
Keyword(s):  
Phosphate Rock ◽  
Phosphorus Availability ◽  
Coffee Pulp ◽  
Minjingu Phosphate Rock

scholarly journals Minjingu phosphate rock availability in low-pH highly weathered soil as affected by added salts

2015 ◽  
Vol 72 (5) ◽  
pp. 440-451 ◽  
Author(s):  
Isaac Savini ◽  
Saidou Koala ◽  
Job Kihara
Keyword(s):  
Phosphate Rock ◽  
Low Ph ◽  
Weathered Soil ◽  
Minjingu Phosphate Rock

Bioresource Efficacy of Phosphate Rock, Sulfur, and Thiobacillus Inoculum in Improving Soil Phosphorus Availability

2016 ◽  
Vol 47 (11) ◽  
pp. 1441-1450 ◽  
Author(s):  
Marzieh Jazaeri ◽  
Abdolreza Akhgar ◽  
Mehdi Sarcheshmehpour ◽  
Amir Hossein Mohammadi
Keyword(s):  
Phosphate Rock ◽  
Soil Phosphorus ◽  
Phosphorus Availability

EFFECT OF COMBINING ORGANIC RESIDUES WITH MINJINGU PHOSPHATE ROCK ON SORPTION AND AVAILABILITY OF PHOSPHORUS AND MAIZE PRODUCTION IN ACID SOILS OF WESTERN KENYA

2007 ◽  
Vol 43 (1) ◽  
pp. 51-66 ◽  
Author(s):  
M. N. KIFUKO ◽  
C. O. OTHIENO ◽  
J. R. OKALEBO ◽  
L. N. KIMENYE ◽  
K. W. NDUNG'U ◽  
...  
Keyword(s):  
Soil Ph ◽  
Phosphate Rock ◽  
Farmyard Manure ◽  
Combined Treatment ◽  
Chicken Manure ◽  
Available P ◽  
Organic Residues ◽  
Maize Production ◽  
Study Results ◽  
Minjingu Phosphate Rock

Experiments were conducted in both the greenhouse and the field on highly weathered (Orthic Ferralsol) soils to evaluate the effect of combining on-farm organic residues (chicken manure, farmyard manure, sugar bagasse) with Minjingu phosphate rock (MPR) on soil pH, extractable (available) and sorbed phosphorus (P), and to assess the cost benefit for maize production. The greenhouse study results indicated that, in the first eight weeks of incubation, soil pH increased linearly with increase in MPR rates and decreased thereafter. The available P also increased linearly. Chicken manure and sugar bagasse were most and least effective respectively in reducing P sorption, while there was a significant negative relationship between P adsorption maxima and extractable P. The field experiment data showed that the available P values increased significantly above the control in all the treatments where MPR and organic materials were applied separately or combined. Treatment effects on Langmuir sorption maxima (Smax) in the field were variable. An increase in Smax with an increase in MPR rates was noted. However, there was a positive relationship between Smax and available P (r = 0.52 to 0.69), suggesting the diversity of factors affecting the complex nature of P dynamics under field conditions. MPR applied alone in the first season gave a significant residual positive effect on maize grain yield for two additional seasons. The economic analysis revealed that a single application of chicken manure (2 t ha−1) combined with MPR at 60 kg P ha−1 gave the highest incremental net benefit equivalent to US$ 657 ha−1 during the three maize cropping seasons.

Organic resources and earthworms affect phosphorus availability to sorghum after phosphate rock addition in semi-arid West Africa

2005 ◽  
Vol 41 (6) ◽  
pp. 458-465 ◽  
Author(s):  
Elisée Ouédraogo ◽  
Lijbert Brussaard ◽  
Abdoulaye Mando ◽  
Leo Stroosnijder
Keyword(s):  
West Africa ◽  
Phosphate Rock ◽  
Phosphorus Availability ◽  
Arid West ◽  
Organic Resources ◽  
Semi Arid

scholarly journals Partial acidulation of phosphate rock for enhanced phosphorus availability in alluvial soils of Bihar, India

2016 ◽  
Vol 8 (3) ◽  
pp. 1393-1397 ◽  
Author(s):  
Kasturikasen Beura ◽  
Rajeev Padbhushan ◽  
Amit Kumar Pradhan ◽  
Nintu Mandal
Keyword(s):  
Phosphate Rock ◽  
Rock Phosphate ◽  
Phosphorus Availability ◽  
Order Reaction ◽  
First Order Reaction ◽  
Alluvial Soils ◽  
Second Order Reaction ◽  
Maximum Correlation ◽  
First Order ◽  
Total P

The present study was undertaken to fractionate partially acidulated phosphate rock (PAPR) and evaluate its effect on Phosphorus availability in alluvial soils. For this purpose, low grade phosphate rock was collected from Udaipur, Rajasthan and acidulated at different degrees with sulphuric acid (H2SO4) (v/v)Results from an incubation study showed that the available fraction of P [Water soluble (WSP) and Citrate soluble (CSP)] increased with increasing degree of acidulation. The maximum WSP was obtained at 50% H2SO4 (52.30% of total P) and the maximum CSP was obtained at 80% H2SO4 (49.54% of total P). 50 % dissolution of rock phosphate was the best treatment and found to be at par with that of 60% and 80% but was significantly superior to rest of the treatments. The maximum WSP in the soil samples was obtained after acidulation with 50 %H2SO4 and the maximum Olsen’s P by the 14th day of incubation. An increasing trend was found at initial stages of incubation (7-14 days) with a notable decrease in the later stages. WSP demonstrated the maximum correlation at 40% dissolution(r = 96* for first order reaction, r =95* for second order reaction) while for Olsen’s P, the maximum correlation was found in initial rock phosphate sample (r =88* for first order reaction, r =94* for second order reaction). Kinetics analysis of the obtained rock phosphate demonstrated that the PARP has more influence on phosphorus release pattern as compared to the inorganic P (SSP).

scholarly journals Evaluation of phosphate solubilization from phosphoric rock via Aspergillus niger and Penicillium sp

2020 ◽  
Vol 37 (2) ◽  
Author(s):  
Leandro Argotte ◽  
Oscar Fernando Barreiro ◽  
Néstor Enrique Cerquera ◽  
Hans Thielin Castro
Keyword(s):  
Aspergillus Niger ◽  
Mycelial Growth ◽  
Phosphate Rock ◽  
Phosphate Solubilization ◽  
Additional Treatment ◽  
Identification Methods ◽  
Coffee Pulp ◽  
Environmental Media ◽  
Penicillium Sp ◽  
Low Solubility

Phosphoric rock is the main source of phosphorus used in fertilizers. In most cases, it is applied alone or mixed with other nutrients in water; however, its low solubility means that it is not used efficiently, causing excess phosphorus to be wasted. As a result, it generates economic expenses to the farmer, or causing problems of eutrophication in water sources. In this article, different mixtures of solubilizing fungi with coffee pulp stillage were studied to improve phosphates’ solubility in phosphate rock. Despite that in different studies is clear the fungi’s role in P solubilization, its application on soils is still made without any additional treatment. Phosphoric rock samples were obtained from the municipality of Aipe (Huila) and were treated for 6 weeks with coffee pulp stillage (Coffea arabica) and inoculums of Aspergillus niger and Penicillium sp, pH and temperature controlled. The fungus species were obtained from environmental media on PDA culture, then it was isolated and identified on MEA culture according to standard morphologic identification methods. Aspergillus niger showed greater mycelial growth in the stillage and a higher concentration of phosphates dissolved in the aqueous phase (72 ± 31 M) compared to Penicillium sp. The mixture of the two fungi in the treatments allowed to obtain the highest percentage of phosphates (17.8% of the phosphate soluble in H2SO4 40% v / v).

scholarly journals ASSESSMENT OF PHOSPHORUS AVAILABILITY FROM UNREACTIVE TOGO PHOSPHATE ROCK BY LEGUME AND CEREAL CROPS IN TWO GHANAIAN SOILS

2020 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Alex Boateng ◽  
Prof. Emmanuel Owusu- Bennoah
Keyword(s):  
Phosphate Rock ◽  
Dry Matter ◽  
P Uptake ◽  
Phosphorus Availability ◽  
Direct Application ◽  
Water Soluble ◽  
Cereal Crops ◽  
Dry Matter Yield ◽  
Water Soluble P ◽  
Soluble P

Purpose: In recent years, phosphate rock (PR) for direct application has been tested in tropical acid soils as a potential alternative to conventional water-soluble P fertilizers like Single Superphosphate (SSP) and Triple Superphosphate (TSP). However, direct application of PR with low reactivity does not always give satisfactory results. Legume and cereal crops represent a strategy that can be used to solubilize P from some of these unreactive PRs. The objective of this study was to assess the availability of P from unreactive Togo Phosphate Rock (TPR) relative to TSP by six (6) crop species in two Ghanaian soils. Methodology:  The study was conducted in the greenhouse of the Crop Science Department, University of Ghana. Three P rates, 0mg, 50mg and 100mg P of TPR and TSP were applied to a kilogram of soil per pot in the two soil series. Randomized Complete Block Design was used to do the analyses. Results/Findings: Application of TSP resulted in higher dry matter and P uptake irrespective of the soil type. Among the legumes, cowpea gave the highest dry matter yield. Fairly, a similar trend was obtained with the application of TPR. Among the cereals, the average P uptake by sorghum from TPR was the highest, followed by maize and millet in the Nzema soil. In the Adenta series, P uptake by maize was the highest, followed by sorghum and millet. Phosphorus (P) uptake by the cereals from TPR was generally better in the Adenta than the Nzema soil. Unique contribution to theories, practice and policy: Results show increasing the rate of TPR to 100mg P/pot resulted in an increase in dry matter yield and P uptake in both soils, but was inferior to 100mg P/pot TSP application. Consequently, the rate of application of TPR should always be high if farmers want the best from their investments. Again, the low relative agronomic effectiveness of TPR for all the crops, proved the low reactivity of the material and its subsequent low performance compared with the water-soluble P. The low reactivity and the high molar mass of PO43-/CO32- of the TPR will always make it difficult for P to be made available from the TPR despite the acidity of the soil, the high density of the crops and the ability of the tested crops to exude organic acids, which facilitate phosphorus availability from TPR, therefore making TPR unsuitable for direct application.

scholarly journals White Lupin (Lupinus albus L. cv. Amiga) Increases Solubility of Minjingu Phosphate Rock, Phosphorus Balances and Maize Yields in Njoro Kenya

2014 ◽  
Vol 3 (3) ◽  
pp. 37 ◽  
Author(s):  
Joyce J. Lelei ◽  
Richard N. Onwonga
Keyword(s):  
Grain Yield ◽  
Phosphate Rock ◽  
Block Design ◽  
Lupinus Albus ◽  
Farming Systems ◽  
White Lupin ◽  
Wide Range ◽  
Maize Yields ◽  
Lupinus Albus L ◽  
Minjingu Phosphate Rock

<p>Exudation of high amounts of citrate in white lupin (<em>Lupinus albus L. cv. Amiga</em>) has the advantage of being effective in mobilization of a wide range of sparingly soluble P sources. To improve cultivation system of maize, a field experiment was conducted to assess effectiveness of white lupin (<em>Lupinus albus</em> L. cv. Amiga) in increasing solubility of minjingu phosphate rock (MPR), phosphorus balances and maize yields in Njoro sub-County, Kenya. The randomized complete block design experiment was conducted for four seasons; short (October – February) and long rain seasons (March-September) of 2010 and 2011. The treatments were; (i) fallow (F) – maize (M) rotation with triple superphosphate (TSP) applied (M<sub>TSP</sub>- F), (ii) fallow - maize rotation with MPR applied (M<sub>MPR</sub> –F), (iii) lupin (L) – maize rotation with MPR applied (M<sub>MPR</sub>- L) and (iv) maize/lupin intercrop with MPR applied (M/L<sub>MPR</sub> – F). Soil and plant P and maize grain yield were higher in M/L<sub>MPR</sub> – F (with additional lupin grain yield) and M<sub>TSP</sub>– F treatments. All treatments resulted in positive P balances at the end of two years with highest values in M<sub>TSP</sub>– F treatment and lowest in M/L<sub>MPR</sub> – F. Intercropping lupin with maize amid application of MPR is recommended for enhanced maize performance in the farming systems of resource poor farmers. Measurement of available soil nitrogen and comparison of lupin with other legumes in solubilizing MPR is recommended.</p><p> </p>

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