Bioavailability and mechanism of modified rock phosphate in calcareous soil

2012 ◽  
Vol 20 (3) ◽  
pp. 303-309
Author(s):  
Ya-Juan LI ◽  
Cui-Hong YANG ◽  
Bo CHEN ◽  
Hui-Zhen QIU
Keyword(s):  
Calcareous Soil ◽  
Rock Phosphate

Availability of phosphorus in a calcareous soil treated with rock phosphate or superphosphate as affected by phosphate-dissolving fungi

1989 ◽  
Vol 120 (2) ◽  
pp. 181-185 ◽  
Author(s):  
H. M. Salih ◽  
A. I. Yahya ◽  
A. M. Abdul-Rahem ◽  
B. H. Munam
Keyword(s):  
Calcareous Soil ◽  
Rock Phosphate

scholarly journals The Sewage Sludge Biochar and Its Composts Influence the Phosphate Sorption in an Alkaline–Calcareous Soil

2021 ◽  
Vol 13 (4) ◽  
pp. 1779
Author(s):  
Rabia Abdur Rehman ◽  
Muhammad Farooq Qayyum ◽  
Ghulam Haider ◽  
Kate Schofield ◽  
Muhammad Abid ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Soil Ph ◽  
Calcareous Soil ◽  
Rock Phosphate ◽  
X Ray Diffraction ◽  
P Adsorption ◽  
P Sorption ◽  
P Recovery ◽  
Sorption Characteristics

This study evaluates the potential of sewage sludge, farm manure, rock phosphate, and their composts or biochar as useful materials for phosphorous (P) recovery. An alkaline–calcareous soil was incubated with different compost-based amendments to discern their impact on the P sorption characteristics. The treatments examined consisted of sewage sludge (SS), SS biochar (SS-BC), or composts of SS with rock phosphate (RP) and farm manure (FM) in different ratios, i.e., (i) control, (ii) SS, (iii) SS-BC, (iv) SS50:FM50, (v) SS75:FM25, (vi) SS25:FM25:RP50, (vii) SS50:FM25:RP25, (viii) SS75:FM0:RP25, and (ix) SS50:FM0:RP50. Prior to incubation for 45 days, the composts and biochar treatments combinations were characterized for elemental composition using Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) spectroscopy. The treated soils were analyzed for soil pH, electrical conductivity (EC), Olsen’s P, and P adsorption isotherms, at day 5 and 45 of the incubation. Langmuir and Freundlich’s equations were used to calculate P adsorption. Results showed that there was no significant influence on soil pH for any treatment throughout the experiment. However, soil EC decreased significantly for all treatments after 5 days of incubation; however, this effect was diminished after 45 days of incubation. All the treatments significantly decreased P sorption capacity both at the start (day 5) and end of the incubation (day 45) period compared to control. The treatment combination SS25:FM25:RP50 recovered the highest Olsen-P (79.41 mg kg−1). The other treatment combinations including SS and FM also recovered a greater Olsen’s P compared to the control. However, the sole application of only SS showed lower P recovery than the control soil, which further decreased with increase in incubation time. These findings improve our understanding that the stable pool of bioavailable P within an alkaline calcareous soil can be mobilized by using different organic treatment combinations instead of only SS. However, further in situ investigations may help to valorize the potential of sewage sludge, farm manure, rock phosphate, and their composts or biochar to improve P recovery in alkaline–calcareous.

Phosphate solubilization and promotion of maize growth by Penicillium oxalicum P4 and Aspergillus niger P85 in a calcareous soil

2015 ◽  
Vol 61 (12) ◽  
pp. 913-923 ◽  
Author(s):  
Zhongwei Yin ◽  
Fachao Shi ◽  
Hongmei Jiang ◽  
Daniel P. Roberts ◽  
Sanfeng Chen ◽  
...  
Keyword(s):  
Aspergillus Niger ◽  
Organic Acids ◽  
Crop Production ◽  
Calcareous Soil ◽  
Rock Phosphate ◽  
Growth Promotion ◽  
Penicillium Oxalicum ◽  
Fresh Mass ◽  
Available Phosphorus ◽  
Maize Growth

Alternative tactics for improving phosphorus nutrition in crop production are needed in China and elsewhere, as the overapplication of phosphatic fertilizers can adversely impact agricultural sustainability. Penicillium oxalicum P4 and Aspergillus niger P85 were isolated from a calcareous soil in China that had been exposed to excessive application of phosphatic fertilizer for decades. Each isolate excreted a number of organic acids into, acidified, and solubilized phosphorus in a synthetic broth containing insoluble tricalcium phosphate or rock phosphate. Isolate P4, applied as a seed treatment, increased maize fresh mass per plant when rock phosphate was added to the calcareous soil in greenhouse pot studies. Isolate P85 did not increase maize fresh mass per plant but did significantly increase total phosphorus per plant when rock phosphate was added. Significant increases in 7 and 4 organic acids were detected in soil in association with isolates P4 and P85, respectively, relative to the soil-only control. The quantity and (or) number of organic acids produced by these isolates increased when rock phosphate was added to the soil. Both isolates also significantly increased available phosphorus in soil in the presence of added rock phosphate and effectively colonized the maize rhizosphere. Studies reported here indicate that isolate P4 is adapted to and capable of promoting maize growth in a calcareous soil. Plant-growth promotion by this isolate is likely due, at least in part, to increased phosphorus availability resulting from the excretion of organic acids into, and the resulting acidification of, this soil.

Zinc application enhances grain zinc density in genetically-zinc-biofortified wheat grown on a low-zinc calcareous soil

2018 ◽  
pp. 107-110 ◽  
Keyword(s):  
Developing Countries ◽  
Grain Yield ◽  
Calcareous Soil ◽  
Zn Deficiency ◽  
Target Level ◽  
Zn Concentration ◽  
Grain Zinc ◽  
Zn Availability ◽  
Zinc Application ◽  
Grain Zn Concentration

Human zinc (Zn) deficiency is a worldwide problem, especially in developing countries due to the prevalence of cereals in the diet. Among different alleviation strategies, genetic Zn biofortification is considered a sustainable approach. However, it may depend on Zn availability from soils. We grew Zincol-16 (genetically-Zn-biofortified wheat) and Faisalabad-08 (widely grown standard wheat) in pots with (8 mg kg−1) or without Zn application. The cultivars were grown in a low-Zn calcareous soil. The grain yield of both cultivars was significantly (P≤0.05) increased with that without Zn application. As compared to Faisalabad-08, Zincol-16 had 23 and 41% more grain Zn concentration respectively at control and applied rate of Zn. Faisalabad-08 accumulated about 18% more grain Zn concentration with Zn than Zincol-16 without Zn application. A near target level of grain Zn concentration (36 mg kg−1) was achieved in Zincol-16 only with Zn fertilisation. Over all, the findings clearly signify the importance of agronomic Zn biofortification of genetically Zn-biofortified wheat grown on a low-Zn calcareous soil.

Screening, Identification and Dissolving Characteristics of a Strong Phosphorus Solubilizing Fungi in Calcareous Soil

2013 ◽  
Vol 19 (5) ◽  
pp. 873-877
Author(s):  
Zhiwei QIAO ◽  
Jianping HONG ◽  
Yinghe XIE ◽  
Linxuan LI ◽  
Zhenxing REN
Keyword(s):  
Calcareous Soil
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