种植密度对脱毒怀地黄生长发育、产量和品质的影响

Effect of Planting Density on the Agronomic Traits,Yield and Quality of virus-free seedling of Rehmannia glutinosa

以怀地黄为试材,研究了怀地黄脱毒试管苗在不同种植密度下(667m^2种植8 000、12 000、16 000、20 000、24 000株)的生长发育、产量和品质的差异,以寻找适合脱毒怀地黄高产优质的种植密度。结果表明:在相同种植密度下,怀地黄脱毒苗在各个生长阶段的株高、叶片数、冠幅和叶片面积变化较大,其中株高、冠幅、叶面积均在9月达到最大值,叶片数在10月达到最大值,667m^2种植密度为20 000株时株高最高,667m^2种植密度为8 000株时冠幅、叶片数和叶片面积最大;667m^2种植密度为20 000株时产量最高,鲜质量为6 105.80kg,干质量为1 393.30kg;梓醇667m^2种植密度为20 000株时达到最大值2.860%,毛蕊花糖苷则在667m^2种植密度为16 000株时达到最大值,为0.085%。综合可知,667m^2种植密度20 000株为脱毒怀地黄种植的最适密度。

Rehmannia glutinasa was used as test material,by making a survey on the difference in the growth,yield and quality of Rehmannia glutinasa virus-free seedling growing in different planting density（8 000,12 000,16 000,20 000,24 000 palnt per 667m^2）to find out the best planting density for high-yielding and quality.The results showed that growing in the same planting density,plant height,leaf number,crown breadth and leaf area of virus-free seedling in the different growth stages varied drastically.Plant height,crown breadth and leaf area were all the highest in September,leaf number was the largest in October.Plant height was the highest when planting density was 20 000 plants per 667m^2.Crown breadth,leaf number and leaf area were the largest when planting density was 8 000 plants per 667m^2.Yield was the highest when planting density was 20 000 plants per667m^2,including fresh weight which was 6 105.80 kg,and dry weight which was 1 393.30 kg.The content of catalpa was the highest,reaching 2.860%,when planting density was 20 000 plants per 667m^2,and the content of acteoside was the highest,reaching 0.085%,when planting density was 16 000 plants per 667m^2.In conclusion,the optimal planting density of Rehmannia glutinosa virus-free seedling was 20 000 plants per 667m^2.