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通过连续2年的试验证明，施用多效哇能控制落叶松树高生长速度，而对树冠的扩建、结实无显著影响。
Through two years of continuous experiments, it has been proved that the application of multi-effect Wow can control the high growth rate of larch trees, but has no significant effect on the expansion and fruiting of the canopy.