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通过田间调查,初步探明了刻叶刺儿菜Cephalanoplossetosum(Willd)Kintam,在青稞田不同发生密度对青稞产量的影响。结果表明,刻叶刺儿菜密度每m^2内1,2,3,4,5,6,7,8,9,10株时,青稞减产依次为0.9%,7.0%,11.1%,11.1%,14.3%,17.4%,18.1%,30.8%,30.3%,32.8%,刻叶刺儿菜发生密度对青稞减产的回归方程为:Y=0.