杉木无性系嫩枝扦插繁殖技术

The Cutting Propagation Technology of Cunninghamia lanceolata Clones

杉木是我国主要的用材林树种。为加快杉木优良无性系的繁育进程,开展杉木无性系扦插繁殖技术研究,探索生长素、扦插基质和插穗长度对杉木不定根生长的影响。结果表明:生长素对不定根的诱导有明显的影响,最佳的生长素处理方法为0.5 g/L的IBA浆蘸后直插到基质中,扦插基质以30%椰糠+70%红心土为最优,扦插成活率84.31%。最适合杉木嫩枝扦插的插穗长度为15 cm左右,可在较短的时间诱导不定根的形成。扦插90天时,每个插穗平均能形成8.56条不定根,扦插成活率85.83%。

Cunninghamia lanceolata is the main timber forest species in China.In order to speed up the breeding process of fine clones of Cunninghamia lanceolata,we studied the cutting propagation technology of Cunninghamia lanceolata clones by investigating the effects of auxin,cutting substrate and cuttings length on the growth of Cunninghamia lanceolata adventitious root.The results showed that auxin had obvious inducing effect on adventitious roots.The best treatment was 0.5g/L IBA slurry+30%coconut bran+70%red mud,with which the survival rate of cuttings was 84.31%.The optimum length of cuttings was about 15 cm,by which the adventitious roots were induced in a short time.After 90 days of cutting,each cutting could form 8.56 adventitious roots on average,and the survival rate of cuttings was 81.83%.