落叶松种子超干贮藏含水量和引发条件的选择

Optimum Moisture Content and Priming Condition of Larix gmelinii var. principis-rupprechtii Utradry Seed

采用硅胶干燥法处理华北落叶松(Larix gmelinii var.principis-rupprechtii)种子,获得含水量分别为9.11%、7.00%、5.09%、4.18%、3.21%、2.11%的种子。超干种子在室温下贮藏3个月后,进行回湿处理或PEG 6000引发处理后进行发芽试验,测定种子发芽率、发芽指数和活力指数。结果表明,超干处理的种子采用质量分数20%的PEG 6000引发有较高的种子活力。含水量为4.18%的种子发芽率、发芽指数以及活力指数均比其他含水量的超干种子高。

Silica dehydrator was used to obtain ultradry seeds of Larix gmelinii var.principis-rupprechtii with different moisture content（9.11%,7.00%,5.09%,4.18%,3.21%,2.11%）.After being stored at room temperature for 3 months,the ultradry seeds were treated by pre-humidification or PEG 6000 priming treated.The germination rate,germination index and vigor index of utradry seeds with different moisture content were determined.The results showed that 20% PEG 6000 priming was good for utradry seeds.And larch seeds with 4.18% moisture content had the highest germination rate,germination index and vigor index.