Changes in extractable organic phosphorus in soil in the presence and absence of plants
- 27 Downloads
- 9 Citations
Summary
The effect of cropping on soil organic phosphorus was investigated in laboratory and greenhouse work with six soils. Successively lower contents of extractable organic phosphorus were found in samples that had been (a) airdried initially and stored in that condition, (b) incubated in a moist condition but without a crop, and (c) planted to four successive crops, the roots of the crops being removed before analysis of the soil. These differences were statistically significant. Samples of rhizosphere soil taken after the fourth crop did not yield significantly different amounts of extractable organic phosphorus than did bulk samples of cropped soil taken at the same time. Extractable organic and inorganic phosphorus in the soils were not significantly affected by drying the soil before each crop.
Keywords
Phosphorus Plant Physiology Lower Content Bulk Sample Rhizosphere SoilPreview
Unable to display preview. Download preview PDF.
References
- 1.Diest, A. van, and Black, C. A., Soil organic phosphorus and plant growth. II. Organic phosphorus mineralized during incubation. Soil Sci.87, 145–154 (1959).Google Scholar
- 2.Goring, C. A. I., and Clark, F. E., Influence of crop growth on mineralization of nitrogen in the soil. Soil Sci. Soc. Amer. Proc.13, 261–266 (1949).Google Scholar
- 3.Hayashi, T., and Takijima, Y., Studies on utilization of soil organic phosphorus to crop plants (Part 3). On reduction of organic phosphorus content in soils caused by cropping. (Translated title). J. Sci. Soil Manure26, 215–218 (1955).Google Scholar
- 4.Legg, J. O., and Allison, F. E., Role of rhizosphere micro-organisms in the uptake of nitrogen by plants. Trans. 7th Internat. Congr. Soil Sci. (Madison)2, 545–550 (1961).Google Scholar
- 5.Sekhon, G. S., and Black, C. A., Uptake of phosphorus by plants in relation to carbon dioxide production and organic phosphorus mineralization in soils. Plant and Soil29, 299–304 (1968).Google Scholar
- 6.Thompson, L. M., Black, C. A., and Zoellner, J. A., Occurrence and mineralization of organic phosphorus in soils, with particular reference to associations with nitrogen, carbon, and pH. Soil Sci.77, 185–196 (1954).Google Scholar