Journal article

Publication year: 1993

Pages: 279-285

Journal: Journal of Plant Nutrition and Soil Science

Volume number: 156

Issue number: 4

ISSN: 0044-3263

DOI Link: https://doi.org/10.1002/jpln.19931560402

Publisher: Wiley-VCH Verlag

Abstract: 

1.) In Pots (sandwich-technique according to Helal and Sauerbeck), where the soil (A(p)-horizon of an Alfisol-Udalf from loess) was separated into a root chamber and an outer chamber (up to 10 mm away from the root chamber), the phosphorus (P) availability of super-P, rock-P (Hyper-P) and organic P [myo-inositol-2-mono-P di(cyclohexylammonium) salt] was studied. P was applied at a rate of 50 mg P kg-1 soil only in the outer chamber. This P fertilization resulted in significant increase of CAL- and water-extractable P in the treatment with organic P and super-P compared to the P0 treatment. During 6 cuts of Lolium perenne organic P showed the same effect on the P-uptake of plants as super-P. Compared to the treatment without P, rock-P had no effect on the P-uptake. The higher P-uptake of Lolium perenne both in the super-P- and organic P-treatment was reflected at the end of the experiment only by the CAL-P content differences between root chamber and outer chamber. The highest activity of acid phosphatase, measured in air dried soil was found in the root chamber of the organic P treatment.

The content of EUF extractable organic P was significantly higher in the root chamber of the treatments with super-P and organic P than in the P0- and rock-P-treatment.

2.) The P elution was studied with 2 soils (A(p)-horizon of an Alfisol-Udalf from loess pH: 6.4; A(h)-horizon of a basaltic brown soil pH: 5.4) under lab conditions in columns. In the super-P- and organic P-treatment leached P was mainly inorganic. In the soil with low pH value (5.4), P was leached in the treatment with super-P or organic P in a higher amount of organic P than in the soil with pH 6.4. The results of this experiment do not show in which form the applied organic P was moved to the roots or displaced in the soil.

Harvard Citation style: DOU, H. and STEFFENS, D. (1993) MOBILITY AND AVAILABILITY OF PHOSPHORUS FROM ORGANIC AND INORGANIC FORMS IN THE RHIZOSPHERE OF LOLIUM-PERENNE, Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde, 156(4), pp. 279-285. https://doi.org/10.1002/jpln.19931560402

APA Citation style: DOU, H., & STEFFENS, D. (1993). MOBILITY AND AVAILABILITY OF PHOSPHORUS FROM ORGANIC AND INORGANIC FORMS IN THE RHIZOSPHERE OF LOLIUM-PERENNE. Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde. 156(4), 279-285. https://doi.org/10.1002/jpln.19931560402