Effects of Water and Nitrogen Interaction on Plant Character and Yield at Different Growth Stages of Spring Wheat

The pot method was used to study the effect of water and nitrogen interaction on plant character and yield on spring wheat.The results showed that under the conditions of normal water and moderate drought,wheat height was highest in the middle nitrogen treatment during jointing stage,the others were the highest in high nitrogen treatment,as well as 1 000-grain weight、grain number per spike and grain weight per spike under three water conditions.Under the condition of three nitrogen level,both 1 000-grain weight and spike grain weight per pot of wheat were highest under middle drought treatment.As the water stress aggravated,the plant height,dry biomass and the number of grain per spike in wheat reduction.