
TY  - JOUR
A1  - Mclaughlin, MJ 
A1  - Alston, AM 
A1  - Martin, JK 
T1  - Phosphorus cycling in wheat-pasture rotations.  III. Organic phosphorus turnover and phosphorus cycling
JF  - Soil Research
JO  - Soil Res.
Y1  - 1988
VL  - 26
IS  - 2
SP  - 343
EP  - 353
KW  - 
UR  - https://doi.org/10.1071/SR9880343 
N2  - The incorporation of 32P and 33P from 33P-labelled fertilizer and 33P-labelled pasture residues into organic and inorganic fractions of soil P was studied in a solonized brown soil (Calcixerollic xerochrept) cropped to wheat (Triticum aestivum). Most of the plant residue 33P was present as inorganic P at the time it was added to the soil, but only 7 days later almost 40% had been incorporated into organic P fractions of the soil. As the fertilizer was banded near the soil surface at sowing, little of the 32P from the 32P-labelled fertilizer was incorporated into organic forms, even after 95 days. From a knowledge of the P uptake by the plants and microorganisms, an integrated P cycle for this soil under wheat-pasture rotations was developed. We propose that fertilization of the pasture phase of the rotation stimulates the build-up of residual inorganic and organic P, while fertilization of the wheat phase predominantly stimulates the accumulation of inorganic forms of P in the soil. 
ER  -

