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一、选用良种是薄荷高产的前提品种混杂退化是导致薄荷产量、质量下降的重要原因。最近．阜阳市农科所在大面积738号薄荷田块观察中，发现有72．3／田块产生混杂退化现象，其中混杂变异株达7O％以上的占有Ic．6／；混杂变异株SO％～7O％的占18．5％；混杂变异株3O％～50％的占2
First, the selection of elite varieties is the premise of mint high-yielding hybrid degradation is the main reason leading to mint yield, quality decline. recent. Fuyang City Agricultural Department where a large area of No. 738 peppermint field observation found 72.3 / field plots produce mixed degeneration, mixed variant strains which occupy more than 7O% Ic. 6 /; mixed mutant SO% ~ 7O% accounted for 18.5%; mixed variant 3O% ~ 50% accounted for 2