不同激素和基质对北美香柏扦插成活率的影响研究

Study on Vegetation Propagation of Thuja Occidentalis by Cutting

为了提高北美香柏在沈阳地区的扦插成活率,试验以北美香柏一、二年生的插穗为试材,分别采用不同浓度的IBA、NAA及ABT生根粉浸泡插穗,以清水作对照,并分别在河沙、草炭、炉渣、园土等基质上进行扦插试验.试验表明,在沈阳地区气候条件下,以ABT生根粉100 mg/L浸插穗12 h效果最佳,生根率达到79.1%,而且根系发育良好;一年生插穗比二年生插穗生根率高2.7%;草炭插壤比园土插壤生根率高8.0%.秋季起苗,沙藏越冬,草炭土扦插苗翌年移植成活率高达89.2%,当年新梢生长量4.5 cm.

In order to improve Thuja occidentalis cutting survival in Shenyang region. The experiment us- eThuja occidentalis by one and two years old cutting shoots with different rooting agents including IBA,NAA, ABT treating. Then the plants were made in four nutrition substitude respectively which are river sand,peats, stove ash and garden soil with contrast to the one made in water. The results showed that, among different roo- ting agents,the soaking cutting with 100 mg/L ABT for about 12 hours could get the best result under the cli- mate of east LiaoNing province, with the rooting rate of 79.1% and well developed root; The rooting rate of one - year old cuttings was 2.7 percent higher than that of softwood cutting of two - year old ; the rooting rate in peats was 8.0 percent higher than that of plants in soil substrates. The seedlings were transferred in late au- tumn and buried with sand for living through the winter. The survial rate of transplanting seedlings callus cut- tings in peat reach 89.2% in the second year, which shoot growth can reach 4.5cm.