Effects of the Reducing and Efficiency-increasing Application of Urea Ammonium Nitrate Solution on the Yield and Nitrogen Uptake and Utilization of Wheat
ZHANG Yunhong
YAO Jian
HE Ailing
DU Jun
ZHENG Chunfeng
ZHANG Jiemei
Abstract：Pot experiments were conducted to study the effects of the reducing and efficiency-increasing application of urea ammonium nitrate solution(UAN) on the yield and nitrogen uptake and utilization of wheat,in order to provide scientific basis for the application of liquid nitrogen fertilizer in agricultural production.The results showed that compared with urea,applying UAN increased the plant height by 4.6％-24.5％ at different growth stages of wheat and increased the SPAD value of functional leaves by 5.0％-9.7％ at the late growth stage under the same nitrogen level,thereby raising the yield by 31.9％,which was mainly due to the increase of panicle number.The yield of 80％ UAN treatment did not change significantly as compared to 100％ urea treatment,but was increased by 18.5％ or 5.6％ after fertilizer synergist alginate oligosaccharides(AOS) or amino acid(aa) was added,respectively.Under the same nitrogen level,compared with urea,applying UAN also enhanced the ability of transferring nitrogen to seeds of upper ground organs in early growth period and the contribution to the grain,thereby increasing total nitrogen accumulation in plant by 24.4％;Moreover,nitrogen uptake efficiency,nitrogen recovery efficiency,agronomic nitrogen utilization efficiency and nitrogen fertilizer productive efficiency were also significantly increased by 24.1％,27.1％,33.9％ and 31.9％,respectively.Total nitrogen accumulation of 80％ UAN treatment was 22.0％ higher than 100％ urea treatment,and nitrogen uptake efficiency,nitrogen recovery efficiency,agronomic nitrogen utilization efficiency and nitrogen fertilizer productive efficiency were also significantly increased by 52.2％,55.5％,21.8％ and 22.0％,respectively.The 80％ UAN treatment with AOS added further raised nitrogen harvest index and other nitrogen utilization related indicators as compared to 80％ UAN treatment.The nitrogen contents of the 80％ UAN treatment with nano Mg (OH)2 added were significantly increased,with the increase amplitude of 40.7％ and 16.3％ in shoot at the flowering stage and mature stage,but the changes of other indicators were relatively smaller.In conclusion,the application effects of UAN on wheat were better than urea,for saving fertilizers and increasing revenue.
Keywords：urea ammonium nitrate solutionwheatapplicationyieldnitrogen uptake and utilization
Publication Date：2017-11-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 6-12 )