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泡桐是四旁绿化和农桐间作的优良树种。几年来,石家庄地区共发展桐粮间作170万亩,510万株,其中树高3.5米以下的约80万亩,240万株。这些低干幼树在自然生长条件下很难长起主干,不仅影响材质和出材量,也影响对农作物的光照。去年由于低温,我省南部地区有大量泡桐上部枝干被冻死而干枯。如何使低干变高干,是当前一个急待解决的重要问题。几年来,在赵县、正定、栾城等地进行人工接干摸索出了一些成功经验。现介绍如下:
Paulownia is surrounded by green and fine inter-crop Tong tree. In recent years, a total of 1.7 million mu of Tong grain crops have been developed in Shijiazhuang area, with 5.1 million trees, of which about 800,000 mu and 2.4 million trees are below 3.5 meters in height. These low-dry saplings are difficult to grow trunk under natural growth conditions, affecting not only the material and the amount of wood but also the light exposure to the crop. Last year due to low temperature, the southern region of our province a large number of Paulownia upper branches were frozen to death and dried up. How to make the low-rise cadres become more and more important is an urgent and urgent issue at present. Over the past few years, in Zhaoxian, Zhengding, Luancheng and other places to pick up some dry work out some successful experience. Now introduced as follows: