采用土柱栽培法研究了不同盐分和氮肥水平对菠菜水分与氮素利用效率的影响。结果表明,300 kg ha-1氮水平下,菠菜增产16.6%,水分利用效率（Water Use Efficiency,WUE）提高9.6%;其中以0.87 dS m^-1处理的WUE最大,为25.8 kg m^-3,盐分和氮肥的交互影响使WUE提高1.55 kg m^-3。同时3,00 kg ha^-1氮水平比100 kg ha^-1氮水平的氮素利用效率（Nitrogen UseEfficiency,NUE）平均降低40%。盐分增加,NUE降低。高盐高氮处理的氮肥回收率（Nitrogen Fertilizer Recovery Efficiency,NRE）和农业氮利用效率（Agronomic Nitrogen Use Efficiency,NAE）最低,土壤残留氮量最高,对环境造成的潜在危害最大。
Effect of Different Salinity and Nitrogen on Water and Nitrogen Use Efficiency of Spinach
The pot experiment was conducted to determine the water and nitrogen use efficiency of spinach at different salinity and nitrogen levels.Result indicate that at different salinity levels,the treatments N2 could increase the yield of spinach by 16.6% and water use efficiency（WUE） by 9.6%;the maximum of WUE was 25.8 kg m^-3 in treatment N2S0.The interaction of salinity and nitrogen had significant effect on WUE and increased WUE by 1.55 kg m^-3.In comparison with treatment of N1,those of N2 decreased nitrogen use efficiency（NUE） by 40%.Moreover,salinity increasing promoted NUE decreasing.At higher level of salinity and nitrogen,nitrogen fertilizer recovery efficiency（NRE） and agricultural nitrogen use efficiency（NAE） were the least and residual nitrogen was the most,so the potential danger to environment was most serious.
SalinityNitrogenWater use efficiencyNitrogen use efficiency
NETL
NSTL
万方数据
维普
