Nitrogen fertilization on uptake of soil inorganic phosphorus fractions in the wheat root zone

Fucang Zhang, Shaozhong Kang*, Jianhua ZHANG, Renduo Zhang, Fusheng Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Plant nutrient uptake from the soil is dependent on fertilizers applied, soil chemicals, and other factors. The purpose of this study is to quantify the effects of applied N fertilizers on P uptake by winter wheat (Triticum aestivum L.) and on the change of soil pH in the root zone related to reductions of inorganic P fractions in the rhizosphere soil. An experiment was conducted using different forms of N fertilizers (i.e., NH4+-N and NO3--N) with three N concentrations (0, 100, and 300 mg kg-1) applied in a calcareous soil. Biomass and total N uptake of the plant increased with the N concentrations and NH4+-N fertilizer resulted in a greater biomass than NO3--N nutrition. Total P uptake in the plant was also higher with NH4 +-N fertilizer than with the NO3--N nutrition. Compared with the zero N treatment, the soil pH around the roots decreased by 0.30 and 0.65 units, respectively, with N treatments of 100 and 300 mg kg -1 of NH4+-N fertilizer. The amount of soil inorganic P fractions in the root zone decreased with increasing NH 4+-N applied. The NO3--N treatments reduced rhizosphere acidification and had a less impact on the soil inorganic P fractions. The results suggest that enhancing rhizosphere acidification attributable to applications of NH4+-N fertilizer can increase P availability in calcareous soils for plant uptake.

Original languageEnglish
Pages (from-to)1890-1895
Number of pages6
JournalSoil Science Society of America Journal
Volume68
Issue number6
DOIs
Publication statusPublished - 2004

Scopus Subject Areas

  • Soil Science

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