The Effect of N Fertilizer Placement on the Fate of Urea-15N and Yield of Winter Wheat in Southeast China

PLoS One. 2016 Apr 15;11(4):e0153701. doi: 10.1371/journal.pone.0153701. eCollection 2016.

Abstract

A field micro-plot experiment using nitrogen isotope (15N) labeling was conducted to determine the effects of placement methods (broadcast and band) and N rates (60, 150 and 240 kg ha-1) on the fate of urea-15N in the wheat-soil system in Guangde County of Anhui Province, China. N fertilizer applied in bands increased grain yield by 15% compared with broadcast application. The N fertilizer application rate had a significant effect on grain yield, straw yield and aboveground biomass, as well as on N uptake and N concentration of wheat. The recovery of urea-15N was a little higher for broadcast (34.0-39.0%) than for band treatment (31.2-38.2%). Most of the soil residual N was retained in the 0-20 cm soil layer. At the N rates of 60 and 240 kg ha-1, the residual 15N was higher for band (34.4 and 108.7 kg ha-1, respectively) than for broadcast application (29.6 and 88.4 kg ha-1, respectively). Compared with broadcast treatment, banded placement of N fertilizer decreased the N loss in the wheat-soil system. Band application one time is an alternative N management practice for winter wheat in this region.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Agriculture / methods*
  • Biomass
  • China
  • Crops, Agricultural / drug effects
  • Fertilizers*
  • Nitrogen / chemistry*
  • Nitrogen Isotopes / chemistry
  • Rain
  • Temperature
  • Triticum / drug effects*
  • Urea / chemistry*

Substances

  • Fertilizers
  • Nitrogen Isotopes
  • Urea
  • Nitrogen

Grants and funding

This work was supported by the National Basic Research Program of China (2013CB127401), the National Department Public Benefit Research Foundation of China (201203013), the National Natural Science Foundation of China (41271309), and the Program of the 13th Five-Year Plan in the Institute of Soil Science, Chinese Academy of Sciences (ISSASIP1649).