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楸树(Catalpa bungei G.A.Mey)因“花而不实”,扦插不易生根,至今仍以插根法为主要繁殖方法.但由于种根来源有限,使楸树的发展受到一定的限制.为此,我们从1980年2月开始,采用组织培养法繁殖楸树的研究,不久获得了大批由楸树休眠腋芽形成的试管苗.1981年4～7月又进行了楸树无根试管苗的扦插技术研究,亦获得了成功.我们先后用1000余株楸树无根试管苗作试验,扦插成活600余株.6月24日至7月20日,先后分三批移栽至苗圃地,现仍存活450余株.目前苗木长势良好,一般苗高70～100厘米,最高已达145厘米以上,最大地径2.4厘米.现将研究结果报道如下:
Catalpa bungei GAMey is not easy to root because of “flowers are not real”, so it is still the main breeding method for rooting of Catalpa bungei GAMey, but the development of Catalpa bungei is limited due to the limited source of seed. , We started from February 1980, the use of tissue culture Catalpa bungei study soon won a large number of Catalpa bungei axillary bud dormancy test tube from 1981 to April again Catalpa tree rootless test tube seedlings cuttings Technology research has also been successful.We have used more than 1,000 Catalpa bungei rootless test tube plantlets, cutting more than 600 survived June 24 to July 20, has been divided into three batches transplanted to the nursery, and now Still surviving more than 450. At present, seedlings grow well, the general seedling height of 70 to 100 cm, the highest has reached 145 cm above the maximum diameter of 2.4 cm The results of the study are reported as follows: