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楸树分布地域广,适应性强、材质细腻、用途广泛,是我国珍贵的乡土优良用材树种。由于楸树自花不育,种子极难采集,长期采用落后的断根育苗方法,既不能大量培育壮苗,又不能优株选择;而且成苗率很低。近几年来,我们开展了壮苗培育的技术
Catalpa tree widely distributed, adaptable, delicate materials, wide range of uses, is our precious native wood species. Because Catalpa bungei self-sterile, very difficult to collect seeds, long-term use of backward root nursery method, neither nurturing a large number of strong seedlings, but also superior strains to choose; and the rate of seedlings is very low. In recent years, we have developed strong seedling cultivation techniques