种是万物之源,林木良种是提高造林绿化成效的关键。一般用材林良种的遗传增效要高出普种的10%～30%,而经济林树种良种的遗传增效则更多,可数倍甚至几十倍提高其产量。数十年来,在广大种苗科研、管理、生产人员的共同努力下,湖南林木良种选育工作取得了丰硕成果, Seed is the source of all things, forest seed is to improve the effectiveness of afforestation the key. The general timber forest seed multiplication of genetic efficiency higher than the common species of 10% to 30%, while the economic forest tree seed genetic enhancement is more, several times or even dozens of times to increase its production. For decades, with the joint efforts of scientific research, management and production staff of seedlings, the successful breeding of seed trees in Hunan has achieved fruitful results.