Abstract: This study focused on the double cropping mulberry cultivated in greenhouse. The growth traits of twig and fruit as well as their potential correlation were investigated. The results showed that the fruit branches length (42.20 cm) and its percentage of total twig (98.40%) in the first cropping mulberry were significantly higher than those in the second cropping mulberry (36.90 cm in length and the percentage at 43.30%). As for the fruit traits of first cropping mulberry, the fruit count (5.00 per branch) and the weight (5.60 g) were both higher than the second cropping mulberry with 3.60 fruits per branch and 2.20 g for each fruit. Further analyses indicated that the coarseness of fruit branches was positively correlated with fruit count, fruit weight and length. In addition, the fruit weight also had significantly positive correlation with the length of fruit and its stalk.

Key words: mulberry, double cropping, growth traits of twig and fruit, correlation

摘要： 利用大棚栽培设施开展果桑一年二造栽培试验，探讨二造栽培中植株梢果生长性状及其相关性。结果表明，第一造枝梢生长性状中结果枝长度(42.20 cm)、结果枝占枝梢的比率(98.40%)明显高于第二造结果枝长度(36.90 cm)、结果枝占枝梢比率(43.30%)；果实生长性状中结果枝着果数(5.00粒·枝^-1)、单果重(5.60 g)亦均高于第二造(3.60粒·枝^-1、2.20g)。梢果相关性分析表明，结果枝粗度与着果数、单果重、果穗长相关性较好，果实单果重与果穗长、果径及果柄长均存在极显著正相关。

关键词: 果桑, 一年二造, 梢果生长性状, 相关性