Notice of RetractionIncrease N,P,K Use Efficiency by Interaction of Controlled-Release N and K

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

A pot experiment was conducted to study the effects of controlled-release fertilizers and ratio of N to K on growth of mauls seedlings, interaction, P and K use efficiency and nitrogen balance. The results showed that the release of controlled-release nutritional elements accorded with requirement of mauls seedlings. Controlled release N increased use efficiency of K, and controlled release K increased use efficiency of N. Dry weight of plant, use efficiency of P and K were in the order of controlled-release N and K fertilizer (NK) >; controlled release N fertilizer (CN) >; soluble fertilizer (SF). The level of K had no effect on height and stem diameter, but affected the dry weight. The use efficiency of P was increased with more controlled-release K applied, but the dosage of common K had no effect on P use efficiency. The use efficiency of K was decreased with more controlled release K applied. Nitrogen use efficiency was in the order of NK>;CN>;SF, while loss ratio was in the reverse order. There was no difference in residual ratio between NK and CN but higher than SF. The dosage of controlled-release K had effect on use efficiency and loss ratio of N, while had no effect on residual ratio of N.