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近年来,各地大量发展泡桐,由于育苗工作落后于形势,很多地方采用小苗栽植。以致形成主干低矮,枝条横生,既不利于改善农作物的光照条件,也不利于农活作业,同时降低了桐木出材率及使用价值;另一方面,栽植5米以上大苗,缓苗严重而贻误生长时间,并易造成日灼,风折等弊端,况且大苗需要在圃地培育两年,成本增高,因而泡桐幼树的高干培育就成了这个树种的一个特殊而又十分重要的栽培措施。泡桐的这个特性,是由于顶芽旱死,形成假二叉分枝形成的。泡桐在入冬以后,顶
In recent years, a large number of all over the development of Paulownia, nursery work behind the situation, in many places the use of seedlings planted. Resulting in the formation of low trunk, branches and flourishing, is not conducive to improving the light conditions of crops, is not conducive to agricultural operations, while reducing the Paulownia timber yield and value; the other hand, planting more than 5 meters of seedlings, Hailing serious and delaying Growing time, and can easily lead to sunburn, wind and other drawbacks, Moreover, seedlings need nurturing two years in the nursery, the cost increases, so Paulownia saplings of high stem cultivation has become a special and very important cultivation of this tree species . Paulownia this feature is due to the top bud dry to form a false bifurcation. Paulownia after winter, the top