关于麦饭石对棉花的增产效应已有报道,但对其增产机理的报道甚少。作者通过1988～1990三年的试验研究,对麦饭石增产机理和使用技术进行了初探,现将结果整理如下当土壤中某一种或几种化学元素的含量处于临界值时,往往影响作物产量的进一步提高。据地理研究所对卫辉市土壤微量元素 Maifan on the yield-increasing effect of cotton has been reported, but little coverage of its yield-increasing mechanism. The author through the 1988 to 1990 three years of experimental study on the Maifan stone production mechanism and the use of technology were explored, the results are collated as follows When soil one or several chemical elements in the critical value, often affect the crop Further increase in production. According to the Institute of Geography Huiwei soil trace elements