title: The Effect of N Fertilizer Placement on the Fate of Urea-15N and Yield of Winter Wheat in Southeast China.
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.
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210018, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Zhaoming
authors.initials: Z
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210018, China.
authors.forename: Huoyan
authors.initials: H
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210018, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210018, China.
authors.forename: Yongzhe
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210018, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Shuaishuai
authors.initials: S
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210018, China.
authors.forename: Jianmin
authors.initials: J
authors.lastname: Zhou
mesh_terms: D000383:Agriculture / Q000379:methods*; D018533:Biomass; D002681:China; D018556:Crops, Agricultural / Q000187:drug effects; D005308:Fertilizers; D009584:Nitrogen / Q000737:chemistry*; D009587:Nitrogen Isotopes / Q000737:chemistry; D011891:Rain; D013696:Temperature; D014908:Triticum / Q000187:drug effects*; D014508:Urea / Q000737:chemistry*
chemical_list: D005308:Fertilizers; D009587:Nitrogen Isotopes; D014508:Urea; D009584:Nitrogen