我们经过三年的调研,查清了甘肃省泡桐属植物天然分布原种和变种各1个,引种保存原种5个,变种1个,杂种无性系40个。在甘肃的分布与栽培范围跨越三个气候带、达42个县(市、区),保存面积69.3万亩,保存株数2078.6万株,活立木蓄积量235.4万米~3。 After three years of research, we found out one of the natural distribution varieties and varieties of the genus Paulinia in Gansu Province. Five varieties, one variety and 40 hybrid clones were introduced and preserved. In Gansu, the distribution and cultivation spanning three climatic zones reached 42 counties (cities and districts) with a preserved area of ​​693,000 mu, a conservation of 20,786,000 strains and an accumulated volume of 2,354,000 m3 of living wood.