Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Occurrence of Inositol Hexaphosphate in Some Humid Tropical Soils

B. Ahmed
Department of Soil Science, University of Dacca

A. Islam
Department of Soil Science, University of Dacca

Abstract/ Executive Summary:

The inositol hexaphosphate content of humid tropical soils was determined in the laboratory using two methods. The values of 16 surface soils ranged from 12 to 109 p.p.m. for the Caldwell and Black method and 13 to 124 p.p.m. for Anderson’s method. The former method gave much lower values than Anderson’s presumably because of incomplete precipitation. The inositol hexaphosphate content was significantly correlated with nitrogen, total phosphate, inositol phosphates and orthophosphate retention capacity of the soils

Keywords: Organic carbon, Inositol hexaphosphate, Humid tropical soils

Location:

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

Fractionation studies on soil organic phosphate have shown that higher phosphate esters, particularly inositol penta- and hexaphosphates, are predominant in many soils and form a significant portion of the total organic phosphate The amounts varied with the type of soil, mode of extraction and presence of other soil constituents were studied

Methodology:

Samples of surface soils (0 to l5 cm) were collected from different sites in Bangladesh which represented 16 soil series and four major soil groups. The soils were air dried, mixed and sieved through a 100 mesh screen. Soil reaction were determined in 0.01 M CaCl₂ on a 1:2.5 soil: solution ratio. Analyzes were made for organic carbon by Tinsley’s wet combustion Method as described by Bremner and Jenkinson (1960), total nitrogen by the Kjeldahl method, organic phosphate by the method of Mehta et al. (1954), total phosphate by the Na₂CO₃ fusion method (Jackson, 1962) and total inositol phosphates as described by Anderson (1956). The maximum phosphate retention capacity was determined following the procedure of Williams (1960). Extraction and determination of inositol were undertaken by the methods of Caldwell and Black (1958a) and Anderson (1964).

Source of Information: Trop. Agric. (Trinidad) Vol. 55, No. 2, April 1978.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Correlation coefficients calculated between the inositol hexaphosphate content. There is a close relationship between the amount of inositol hexaphosphate and soil N, total phosphate, organic phosphate and inositol phosphates. Significant correlations between inositol phosphates and total phosphate, organic phosphate and soil N have been recorded. Inositol hexa-phosphate, like orthophosphate, is known to be strongly adsorbed by clay minerals and sesquioxides and its stability is thought to be associated with these properties. Evidence from the present study supports this idea as the amount of inositol hexaphosphate is significantly correlated with orthophosphate retention capacity. Inositol hexaphosphate is inversely correlated with pH at a lower level and with clay content the correlation coefficient is not significant. The correlation with soil organic carbon is not significant, supporting the suggestion that the inositol phosphates are not such an integral part of the organic matter as other phosphate esters.

Knowledge Management: Journal