一、引言泡桐是我国生长最快的用材树种之一,材质好、用途广、适生范围大、易繁殖,其木材又是我国传统的出口物资。泡桐还有一个独特的优点,它的根系分布较深,树冠稀疏,适合与农作物间作,是华北,中原等广大地区实行农田林网和农林间作的好树种。泡桐进入农田,实行农桐问作,是改造自然,充分挖掘自然潜力,合理利用土地, I. Introduction Paulownia is one of the fastest growing timber species in our country. It has good material, wide use, large range of suitable living area and easy reproduction. Its wood is also the traditional export material in our country. Paulownia also has a unique advantage, its deep root distribution, sparse canopies, suitable for intercropping with crops, is in North China, Central China and other regions of the implementation of farmland forest network and good intercropping of agriculture and forestry. Paulownia into the farmland, the implementation of agricultural Tong asked, is to transform nature, fully tap the potential of nature, rational use of land,