乌桕(Sapium sebiferum Roxb.)是我国重要的木本油料树种。桕籽含有固体桕脂(皮油)和液体梓油(青油),其出油率高达40％以上,桕脂、桕油广泛用于肥皂、化工、油漆、食品和国防工业。 乌桕是喜暖的亚热带树种,其自然分布区的地理位置约为北纬18°31′—34°40′。东经98°30′—121°40′之间。我场位于淮北平原,地理位置约当北纬33°15′,东经118°12′属于乌桕自然分布区的北界,全场约有2,000余株散生野桕,其中马楼村徐台生产队有一株1932年栽种的乌桕,胸径35厘米,树高10余米,年产桕籽25—30公斤,但江苏野桕种子小,蜡皮薄,含油低,其品种类型:以小粒型鸡爪桕为主,也有少量短穗型葡萄桕。 我场从1978年起开始进行乌桕良种栽培试验,先后从浙江引进45个乌桕良种,其中 Sapium sebiferum Roxb. Is an important woody oilseed species in our country. Seeds contain solid fat (skin oil) and liquid Zi oil (blue oil), the oil rate of up to 40% or more, fat fat, soy sauce is widely used in soap, chemicals, paints, food and defense industries. The clam is a warm subtropical species whose natural distribution area is located about latitude 18 ° 31’-34 ° 40 ’north. Longitude 98 ° 30’-121 ° 40 ’. My field is located in the Huaibei Plain, the geographical location about latitude 33 ° 15 ’, longitude 118 ° 12’ belongs to the northern boundary of the natural distribution area of ​​桕,, the audience about 2,000 strains of wild wild 其, which Ma floor Mau Village production team has a Plant 1932 planted blackbirds, diameter 35 cm, tree height of 10 meters, with an annual output of 25-30 kg jackfruit, but Jiangsu wild jackfruit seed small, thin wax skin, low oil, the type of species: small-grained Mainly, there are a small amount of short-spike grapevine. Since 1978, our field has started to test the cultivars of highland barley. We have introduced 45 kinds of highland barley from Zhejiang province, among which