通过对开垦的高盐碱生荒地 ,在滴灌条件下 ,覆膜甜菜的肥和水效应分析表明 :在盐碱地土壤相对含水率在 6 5 97% ,氮肥用量在 1 2 9 1 4kg/hm2 范围内 ,产量随用水量和氮肥投入增加而增加 ,超过此用量 ,产量反而下降 ,而最经济的用量是土壤相对含水率为 44 31 % ,氮肥用量为 1 2 7 2 0kg/hm2 。 Through analyzing the fertilizer and water effect of mulched beet in drip irrigation, the results showed that the relative water content in saline-alkali soil was 65.77% and the nitrogen fertilizer was in the range of 12294kg / hm2 , And the yield increased with the increase of water consumption and nitrogen fertilizer input. Exceeding this dosage, the yield decreased but the most economical amount was 44 31% of soil relative humidity and 122 7 0 kg / hm 2 of nitrogen fertilizer.