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我区于1983年引进禾大壮,1986年推广面积已达1.15万亩。1983年我场试喷5亩,灭稗效果100%,1984年推广面积102亩,小区试验表明,水稻落干期保持浅水层,亩喷禾大壮0.5斤,喷后4天稗草心叶退绿转黄,8天后稗草开始萎缩,二星期后稗草全部死亡,灭稗效果100%。大田调查,喷药后15天,每亩稗草数由喷药前的41700株,减少到667株,灭稗效果98.4%,稗草株高比对照低46厘米。1985年全场推广面积1686亩,灭稗效果达98.0%,1986年
My district was introduced in 1983, a large Zhuang, 1986 to promote the area has reached 11500 mu. In 1983 my field test spray 5 acres, the effect of barnyardgrass 100%, 1984 to promote an area of 102 acres, the plot test showed that the paddy dry period to maintain shallow layer, acres spray Wo Dazhuang 0.5 pounds, 4 days after spraying barnyardgrass heart Back green turn yellow, barnyard grass began to shrink after 8 days, two weeks after the death of barnyard grass, barnyardgrass effect of 100%. Field investigation, 15 days after spraying, the number of grass per acre from 41,700 before spraying dropped to 667, the effect of barnyard grass was 98.4%, barnyard grass plant height 46 cm lower than the control. In 1985 the audience to promote the area of 1686 acres, the effect of barnyardgrass reached 98.0%, 1986