采用田间试验的方法 ,研究杨树幼林与小麦间作系统中 ,设置根障对小麦生长和产量的影响。结果表明 ,在集约经营的条件下 ,根障使小麦地上部分生物量积累增加 ,并且叶绿素含量相对下降 9.2 % ,产量提高 3.3% ;在水肥缺乏的情况下 ,根障的存在使小麦的生物量积累降低 ,产量下降 3.2 % A field experiment was conducted to study the effects of setting root barriers on the growth and yield of wheat in young poplar and wheat intercropping systems. The results showed that under the conditions of intensive management, the root barrier increased the aboveground biomass accumulation of wheat and the chlorophyll content decreased by 9.2% and the yield increased by 3.3%. Under the condition of lack of water and fertilizer, the existence of root barrier could make the biomass of wheat Accumulation decreased, output decreased by 3.2%