三年芒是云南芒果产区的主要栽培品种之一,它具有生长适应性强,速生、早产、风味好等优点。在一般管理条件下,植后3—4年可开花结果。但常因营养供应不足而生理落果比较严重,产量低且不稳定。为探索促花保果增产措施,我们于1989年进行了叶面喷施尿素和磷酸二氢钾试验,其结果如下: 材料与方法 在本所果园进行试验,材料为栽培管 Three years Mango is one of the main cultivated varieties of Yunnan mango producing areas, it has the growth adaptability, fast growing, premature, good flavor and so on. Under general management conditions, 3-4 years after planting can bear fruit. However, often due to inadequate supply of nutrients physiological decadent more serious, low yield and instability. In order to explore the promotion of flowers and fruits to increase production, we carried out in 1989 foliar application of urea and potassium dihydrogen phosphate test, the results are as follows: Materials and methods in our orchard to test the material for cultivation tube