黄瓜在我国栽培历史悠久,栽培区域广泛。除露地栽培,还可利用各种保护地栽培,在蔬菜生产中占有重要地位。随着稀土在农作物上的应用日趋广泛,黄瓜上旋用稀土的技术也取得了成功。适量稀土促使黄瓜根系发达,叶片浓绿,植株健壮,抗病力增强,瓜条直、味道好,黄瓜产量增加。但也发现不同的土壤肥力水平,黄瓜施用稀土的增产幅度从5.5％～25％,其变化较大。我们便在土壤肥力水平相差较大的新、老菜田,就黄瓜喷施稀土的浓度、时期与产量这三项关系进行了摸索,在天津砂、壤质潮土上,布置了两因子(时期、浓度),三水平(苗期、初花期、结果期;200PPm,400PPm,600PPm)的正交试验。三年田间试验表明:黄瓜喷施稀士的时期是影响产量的主要因子;喷施浓度是影响产量的次要因子。在肥力水平较高的老菜田 Cucumber cultivation in our country has a long history, cultivation of a wide range of areas. In addition to open-field cultivation, you can also use a variety of protective cultivation, occupies an important position in vegetable production. With the growing use of rare earth crops on the cucumber spin on rare earth technology has also been a success. Appropriate amounts of rare earth to promote the development of cucumber roots, dark green leaves, plant robust, enhanced resistance to disease, straight, delicious, cucumber yield increased. However, it was also found that different soil fertility levels increased the yield of rare earths from 5.5% to 25%. We explored the relationship between the concentration of freshwater and the yield of cucumber in fresh and old vegetable fields where soil fertility was quite different. On the sand and loamy soil in Tianjin, we arranged two factors Period, concentration), three levels (seedling stage, early flowering stage, the result period; 200PPm, 400PPm, 600PPm) orthogonal experiment. Three years of field experiments showed that: the cucumber spraying rare period is the main factor affecting the yield; spraying concentration is the secondary factor affecting the yield. In the fertility level of the old vegetable fields