南方红豆杉海岛迁地栽培与繁殖试验

南方红豆杉Taxus chinensis var．mairei是我国特有的国家一级重点保护植物。自1999年12月开始，在浙江定海首次进行海岛迁地保存育苗及种植栽培技术研究。通过播种、扦插、移栽和定植等迁地栽培与繁殖等各种试验，结果表明，南方红豆杉在舟山海岛苗期生长旺盛，1年生平均苗高为18．9cm，地径0．32cm，最大植株苗高可达35．0cm，地径0．50cm，但必须采取必要的技术措施；扦插育苗生根容易，在备有遮阳网的铜质大棚内间歇喷雾条件下，用5年生幼树做插穗母本，未经任何处理的插穗生根率可达90％，经ABT1号生根粉处理后，生根率最高可达100％；大棚内容器移栽育苗，效果良好；在土层深厚的稳风地带试栽，6年生幼树平均高为2．30m，平均地径5．42cm，平均胸径2．37cm，平均冠幅东西2．42m，南北2．15m，幼树长势旺盛，海岛迁地保存可望成功。表4参11

Ex-situ island cultivation and propagation techniques for Taxus chinensis var. mairei

Taxus chinensis var. mairei is a unique Chinese species designated as a national level key protected plant. In this research, for the first time, ex-situ conservation and cultivation techniques in a series of trials with direct seeding, cuttings, transplants, and colonization were conducted in December, 1999 with T. chinensis vat. mairei on Zhoushan Archipelago. Results showed that seedling growth had an annual average height of 18.9 cm and base diameter 0.32 cm, while with certain technical measures maximum height was 35.0 cm and base diameter was 0. 50 cm. With intermittent spray in a canopy covered with shading nets, fiveyear-old seedlings from cuttings and direct seeding achieved a rooting rate of 90% ; however, using ABT 1 rooting powder （ a high efficiency plant growth regulator）, it was possible to attain 100% rooting. Propagation of transplanted container seedlings in a greenhouse also achieved favorable results. In steady-wind-speed region with a thick soil layer, six-year-old saplings reached an average height of 2. 30 m and base diameter of 5.42 cm with an average diameter at breast height of 2.37 cm; the average crown width from east to west reached 2. 42 m and from south to north 2.15 m. [ Ch, 4 tab. 11 ref.]