桑树的繁殖,多数是用种子育苗。桑树的结实量大,育苗也比较容易。但是,必须掌握好采种时间和育苗技术,才能育出数量多,质量好的桑苗来。桑树的种子,又称为桑椹。桑椹的成熟时间随品种和生长地区纬度的不同而异。在华南地区,从三——四月和九月前后,均有桑椹成熟;在华东地区,桑椹多在5月成熟;而北方各省又稍迟,要在5月下旬和6月中、下旬成熟。我省虽属南方,但海拔较高,地 Mulberry breeding, the majority of seedling is used. Mulberry solidity, nursery is relatively easy. However, we must master the seed time and seedling technology in order to bred a large number, good quality mulberry seedlings. Mulberry seeds, also known as mulberry. The ripening time of mulberry varies with variety and latitude of growing area. In southern China, mulberries mature from March to April and in September, while mulberries in eastern China mature more in May. In the northern provinces, later in mid-to late June, ripening is expected in late May and June . Although our province is south, but higher altitude, to