Impacts of fertilizer application rates on phosphorus dynamics in salt-affected soil

https://doi.org/10.17221/580/2017-PSECitation:Niu L. (2017): Impacts of fertilizer application rates on phosphorus dynamics in salt-affected soil. Plant Soil Environ., 63: 468-474.
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As a new rebuilding agricultural soil on the North China plains, the salt-affected soil had a short soil-forming process of about 30 years. This paper describes the effect of different fertilization systems on phosphorus (P) dynamics in saline-alkali uncultivated land, in the reserved natural salt-vegetation back zone, and in different phases of fertilization for 24 years on the North China plains. The treatments included control (or check, CK), N1, N2, P1, P2, N1P1, N1P2, N2P1, N2P2. The contents of total phosphorus (TP) showed a significantly decreasing trend from 1.32–1.38 g P/kg to 0.40–0.96 g P/kg. The contents of rapidly available P (RP) were low in the no-P fertilizer treatments and the RP concentrations increased with P fertilizer applications. Corn was the crop that used the most P, especially in the no-P and P fertilizer-only treatments. The treatment with 270 kg N/ha/year and 59 kg P/ha/year represents the most economical fertilizer rates for these salt-affected soils on the North China plains.
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