椰糠复配基质在人参穴盘育苗中的应用

Application of coconut bran compound matrix in planting Panax ginseng cave disc seedlings

为探究椰糠替代草炭用作人参穴盘育苗基质的可行性,将椰糠、草炭、蛭石按体积进行不同比例复配,研究不同配比基质对人参种苗生长及生理指标的影响。结果表明:随椰糠在基质中占比的减少,基质通气孔隙度上升,持水孔隙度下降,有效磷、速效钾含量显著高于CK(草炭∶蛭石=5∶3),其中T3处理(椰糠∶蛭石=2∶1)在茎粗、根长、鲜重、干重、根冠比、壮苗指数、叶绿素含量、过氧化物酶(POD)活性、过氧化氢酶(CAT)活性、丙二醛(MDA)含量与CK相比无显著差异,尤以T4处理(椰糠∶蛭石=1∶1)最优,叶面积、地下干重和鲜重、根冠比、壮苗指数、可溶性蛋白、SOD活性、POD活性、MDA含量显著优于CK(P<0.05),隶属函数综合分析得分(0.936)高于CK(0.775)。综上所述,T4处理为最适的椰糠配比基质,能够替代以草炭为主的人参育苗基质配方。

In order to explore the feasibility of replacing grass charcoal with coconut bran as the seedling substrate of ginseng cave disc,coconut bran,grass charcoal and vermiculite were compounded in different proportions according to volume,and the effects of different matching matrices on the growth and physiological indicators of ginseng seedlings were studied.The results showed that with the decrease of the proportion of coconut bran in the matrix,the porousness of the substrate ventilation was increased,the porosity of water retention was decreased,and the contents of available phosphorus and available potassium were significantly higher than those of CK(grass charcoal∶vermiculite=5∶3),of which T3 treatment(coconut bran∶vermiculite=2∶1)was not significantly different from CK in terms of stem thickness,root length,fresh weight,dry weight,root-to-crown ratio,strong seedling index,chlorophyll content,Peroxidase(POD)activity,Catalase(CAT)activity,and Malondialdehyde(MDA)content compared with CK.T4 treatment(coconut bran∶vermiculite=1∶1)was optimal,and the leaf area,underground dry weight and fresh weight,root-to-crown ratio,seedling index,soluble protein,SOD activity,POD activity and MDA content of T4 treatment were significantly better than those of CK(P<0.05),and the comprehensive analysis score of membership function of T4 treatment(0.936),which was higher than that of CK was 0.775.In summary,T4 treatment(coconut bran∶vermiculite=1∶1)is the most suitable coconut bran ratio matrix,which can replace the ginseng seedling matrix formula based on grass charcoal.