Dynamics of phosphorus accumulation in different crop rotations
2005
Zarina, L., Priekuli Plant Breeding Station, Cesis reg. (Latvia)
In Priekuli Plant Breeding Station during 40-year period, the influence of nine crop rotation and five fertilization systems on soil fertility properties was fixed. Measurements of soil nutrient content, including phosphorus (P), were performed each year. The use of different fertilizer application systems had a considerable impact on the content of available P in soil. On non-fertilized background P content under the influence of crop rotation changed by 4, under farmyard manure - 51, under NPK - 73, under stable manure + NPK by 53 and under 2 NPK by 214 mg kgE-1 of soil. Data showed that doses of fertilizers included in investigations were in sharp contrast with the requirements of crops. In fertilizer application systems stable manure + NPK and 2 NPK are unacceptable and in conflict with sustainability of agriculture. The optimal fertilizer system for soil fertility provision is system in which doses of phosphorus are not exceeding 90 kg haE-1.
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