不同基质南蛇藤嫩枝扦插试验研究

Experiment on twig cutting of Celastrus orbiculatus with different substrates

为了筛选有利于南蛇藤嫩枝扦插成活和生根的基质,提高南蛇藤的扦插繁殖效率,该试验研究了沙子、草炭、蛭石、草炭:珍珠岩=2∶1(混合基质体积比为2∶1)、草炭:蛭石=1∶1(混合基质体积比为1∶1)共5种不同基质的南蛇藤嫩枝扦插成活效果。结果表明:(1)扦插成活率以草炭∶珍珠岩=2∶1的扦插成活率最高,为90.8%,其次为草炭,极显著高于或显著高于其它基质。(2)生根数量以草炭基质最多,蛭石最少。(3)平均根长以草炭∶珍珠岩=2∶1最长,为8.67cm,沙子最短。(4)扦插愈伤组织诱导率、愈伤组织生根率、皮部生根率、腐烂率、生根率表现各异,其中沙子、草炭中的愈伤组织诱导率和愈伤组织生根率较高,而腐烂率却很低。通过综合对比,在5种不同基质中草炭是最适宜南蛇藤嫩枝扦插的基质,其次是草炭∶珍珠岩=2∶1。

In order to select cutting media that are conducive to cutting survival and rooting,and improve the cutting propagation technology of Celastrus orbiculatus,this experiment compared and studied the survival effects of five different media,namely,sand,peat,vermiculite,peat:perlite=2∶1,peat:vermiculite=1∶1,on the twig cutting of Celastrus orbiculatus.The results showed that the cutting survival rate was the highest with a mixture of peat and perlite 1∶1,and peat,with 90.8%,respectively 86.7%,significantly different from other substrates.The amount of rooting was the highest in peat matrix and the lowest in vermiculite.The average root length is the longest in a 2∶1 mixture of peat and perlite,which is 8.67cm,and the shortest in sand.Due to the different physical and chemical properties of different substrates,the performance of callus induction rate,callus rooting rate,skin rooting rate,decay rate,and rooting rate in cutting varies.Among them,the callus induction rate and callus rooting rate in sand and peat are high,while the decay rate is very low.Through comprehensive comparison,peat is the suitable substrate for cutting young shoots of Celastrus orbiculatus,followed by a mixed substrate of peat:perlite=2∶1.