乌桕是一种重要的木本油料树种,我国淮河以南各省均有栽培.我场从1978年起开始进行乌桕良种引种栽培试验,经过几年试验观察,已取得初步结果.现整理如下:一、引种地和原产地自然概况引种地泗洪位于洪泽湖畔,约当北纬33°15′,东径118°12′,属暖温带气候,春季干旱,冬季寒冷.土壤为湖荡淤土,由第四纪沉积物发育而成,质地粘重,地下水位一般为0.5—1米,PH值为7.3. Aphid is a kind of important woody oilseed species, which has been cultivated in all provinces in the south of the Huaihe River in our country since 1978.After several years of experimental observation, preliminary results have been obtained. Introduction of natural habitat and origin of origin Sihong is located in Hongze Lake, about latitude 33 ° 15 ’, east longitude 118 ° 12’, is a warm temperate climate, spring drought, cold winter.The soil is silt silt, Developed from the Quaternary sediments, texture sticky, groundwater level is generally 0.5-1 meters, PH value of 7.3.