粤东沿海引种无瓣海桑试验

粤东沿海引种无瓣海桑试验4年的结果表明:该引种区分别比原产地及我国已引种成功的湛江、深圳更北1°08'2°22'和1°06',有其特殊的生长发育、生态适应性等特点以及造林、管护等技术规程,共造林面积243.3hm²,是目前我国该树种引种最北、面积最大、引种最成功的林分.经观测,该林分生长发育正常,在适宜生境下,造林后1年平均树高生长可达2.24m,比乡土树种提前6～7年实现防护作用:造林后一年开花结实,每年2次,能自然更新,1998年9月种植的林分已出现4期自然更新小苗,而且,其抗逆性、经济品质等生物、经济学特性与原产地基本相同.

Analysis on introduction and trial of mangrove Sonneratia apetala on the seashore of east Guangdong

It took 4 years for introduction and trial of mangrove Sonneratia apetala on the seashore of east Guangdong. The results showed that the area of introduction is north to its original and successful introduction in Zhangjiang, Shenzhen about 1°08'N, 2°22'N and 1°06' N. It has own characteristic of growth and ecological adaptability, and for its forestation and protection, the different technical procedures were required. We accomplished the introduction with 243.3 hm2, which becomed the largest, most north and most successful introduction of this kind of plant in our country. The forests were developing normally. Under suitable condition, its average height growth can reach 2.24 m after planted for one year. It would be 6 or 7 years earlier than the indigenous species to realize protective function. After planted for one year, the Sonneratia apetala flowers and bears seeds twice every year and regenerates normally. The forest that was planted in Sept. 1998 had regenerated 4 times. Moreover, both of its biological features, such as resistance, and its economics quality can keep nearly the same as its original.