葡葡桐(又称葡萄桐)具有结实早、丛生性强、座果率高、果大、皮薄、产量高的优点,深受群众欢迎,目前我国南方各省均有引种。但葡葡桐分枝少、枝条长、树体结构不紧凑。为了解它的分枝习性并加以改造,近两年来,我们对上述问题进行了探讨,现报道如下。一、研究方法和步骤采用随机抽样方法调查。用变数统计法计 Portuguese grape (also known as grape vine) with early fruiting, clustering, fruit set high, fruit large, thin skin, high yield advantages, welcomed by the masses, at present, the introduction of the southern provinces of our country. However, less branches Pu Zhi Tong, branches long, the tree structure is not compact. In order to understand its branch nature and transform it, in the past two years, we have discussed the above issues and are now reporting the following. First, the research methods and procedures using random sampling survey. Statistics using variable statistics