A pot experiment was conducted to evaluate the influence of cow slurry on P uptake by corn and to estimate the readily available P in the slurry by using an isotopic labelling technique. Water-soluble P in soil was increased and isotopic
equilibrium of available P was attained after labelled slurry was mixed thoroughly throughout the soil. Labelled slurry applied at planting increased the P uptake by corn, whereas the same amount applied one week before harvest did not affect the P uptake. It was estimated that 46-54% of the total P uptake in plants is derived from the slurry. The readily available P (the L-value) in the slurry was at least 26 mg/kg which equals 3.7% of the total P.
|Place of Publication||Roskilde|
|Publisher||Risø National Laboratory|
|Number of pages||18|
|Publication status||Published - 1988|
|Series||Denmark. Forskningscenter Risoe. Risoe-R|