氮素对大麦产量效应的研究

结果表明，当前大麦推广品种，在中等肥力下，以１５０．０ｋｇ／ｈｍ＾２纯氮为佳，而且以底肥为主。若施氮量低于１１２．５ｋｇ／ｈｍ＾２，不地发挥品的增产潜力，而高于１５０．９ｋｇ／ｈｍ＾２，投盗效益为负值，不同施氮量对产量的经济效益，主要通过总有效稳数而实现。

Effects of Nitrogen Element on grain Yield in Barley

The research results showed that it was appropriate to apply net nitrogen of 150.0 kg/hec. for the currently popularizing barley varieties under the condition of medium tertility,with base tertility being applied mainly.It was not beneficial to exert the yield-increasing potentials of varieties if the applying amount was below 112.5 kg/hec.but above 150.0 kg/hec.,the investment efficency was minus.The economical effects of various applying amount,on yields were achieved mainly through the total number of ear-bearing tillers.