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柳树(Salix L.)是具有极大变异的种群,在我国形态分类上能分辨出种有275种之多,包括垫状灌木、灌木、小乔木及乔木等多种生活型.目前林业上利用的种仅占自然分布种的10%左右.柳树可用来营造用材林、条材林、防护林及风景林.从遗传改良的角度分析,柳树有较之其他树种所不及的优点:雌雄异株,异花授粉,杂合性强,种群变异大;经济及性成熟期短,灌木柳扦插后1—2年便能采收割条,乔木柳10年左右便可采伐利用,扦插后1—2年便开花结籽,授粉后20—25天种子便成熟;
Willow (Salix L.) is a great variation of the population, in the classification of China can be identified as there are 275 species of species, including cushion shrubs, shrubs, small trees and arbors and other life-style now used in forestry Species accounted for only about 10% of the natural distribution of species willow can be used to create timber forests, strip forests, shelter forests and scenic forests from the perspective of genetic improvement, willow than any other species beyond the advantages: dioecious Flower pollination, strong heterozygosity, large population variation; economic and sexual maturity is short, shrubs 1-2 years after cutting will be able to harvest cut, arborvitaie will be about 10 years of cutting use 1-2 years after cutting They flowering and seed, pollination 20-25 days after the seeds will be mature;