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中国经过遗传改良的重要造林树种有100多种,全国年均提供各类林木种子2300万kg,年均生产各类良种壮苗约130亿株。林木良种在生产上的应用产生了明显的综合增益,其中用材林平均生长增益达10%~30%,经济林平均产量增益达15%~68%。中国每年进口林木种子15万kg以上,涉及50多个树种;每年出口林木种子30万kg和苗木400多种。近10年来,中国林木遗传资源的可持续经营和利用已取得了明显的进步,但与一些发达国家相比还存在一定差距。今后,应优先考虑对已保存的林木遗传资源的维护和资金补贴,加强种苗市场监管和信息服务,进一步提高林木良种的基地供种率和良种使用率。
There are over 100 species of important afforestation species that have been genetically improved in China. The country provides 23 million kg of tree seeds each year, with an average annual output of about 13 billion strains of all kinds of seedlings. Forest seed production in the application of a significant overall gain, of which the average growth of timber forest gain of 10% to 30%, economic forest average yield gain of 15% to 68%. China annually imports more than 150,000 kg of tree seeds and involves more than 50 species of trees. Each year, it exports 300,000 kg of tree seeds and 400 kinds of seedlings. In the past 10 years, significant progress has been made in the sustainable management and utilization of forest genetic resources in China, but there are still some gaps compared with some developed countries. In the future, priority should be given to maintaining and subsidizing the conserved forest genetic resources, strengthening seed market supervision and information services, and further improving the base seedling supply rate and improved seed utilization rate of improved seed trees.