不同光周期对半夏珠芽生长状况的影响

Effects of different photoperiod on growth of piniellia ternata bulbil

关键词:  半夏珠芽  光周期  生长  熵权TOPSIS法

Key words:  piniellia ternata bulbil  photoperiod  growth  entropy weight TOPSIS method

摘要:

[目的] 筛选半夏珠芽生长的最佳光周期。[方法] 将半夏幼苗置于装有定时器的发光二极管（LED）灯管下，设置不同光周期处理（2、4、6、8、10、12、14 h/d），对半夏生长形态、珠芽收获情况和发芽情况进行观测记录，使用紫外分光光度计对叶片色素含量进行测定，运用熵权TOPSIS法进行综合评价。[结果]半夏形态指标随光周期延长呈现先升高后降低的趋势；色素含量与光照时间成正比例关系；在8 h/d光周期条件下半夏珠芽收获指标测定值最高，4 h/d光周期的发芽指数最高，且高于其他组别；熵权TOPSIS法综合评价结果表明，在光周期为8 h/d条件下，半夏珠芽的生长状况优于其他组别。[结论] 筛选获得最适光周期为8 h/d，可有效改善半夏珠芽的生长状况。

Abstract:

[Objective] In order to select the optimum photoperiod of Pinielila ternata bud growth.[Methods] The seedlings of piniellia ternata were placed under LED lamp with timer and treated with different photoperiods (2,4, 6,8,10,12,14 h/d),and the growth morphology,bud harvesting and germination of piniellia ternata were observed and recorded. The pigment content of leaves was determined by UV spectrophotometer,entropy weight TOPSIS method was used to carry out comprehensive evaluation.[Results] The morphological indexes increased firstly and then decreased with the extension of photoperiod. Pigment content was proportional to illumination time. At 8 h/d photoperiod,the harvest index of piniellia ternata was the highest,and the germination index was the highest at 4 h/d photoperiod,which was significantly higher than other groups. The comprehensive evaluation results of entropy weight TOPSIS method showed that the photoperiod of piniellia ternata bud cultivation at 8 h/d was better than that of other groups.[Conclusion] The optimum photoperiod was 8 h/d,which could improve the growth of piniellia ternate buds effectively.