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墨西哥落羽杉(Taxodium macronatum)系高大用材树种。它生长快,树干直,树冠小,病虫害少,材质好,为我市城乡绿化较好的树种。但由于它具有白花不孕,种子来源少等缺陷,扦插育苗就成为进行大量繁殖的主要方法。 我院于一九七五年从南京林产工业学院引进母树几十株,进行扦插试验。与此同时,我市川沙、松江、嘉定及宝山等县也相继进行了引种栽培。根据我们初步试验表明,墨西哥落羽杉自5月下旬开始,夏、秋、冬(6、9月和11月温室扦插)均可扦插,并以6月初夏扦插和11月份温室扦插为好。上海郊区的川沙县洋泾苗圃从五月上旬至11月间月月扦插与松江县新桥公社新界大队绿化队的季季扦插也取得相同的结果,生根率都在70—80％以上。 我们的具体做法和体会如下:
Mexico Taxodium macadamia (Taxodium macronatum) Department of tall timber species. It grows fast, straight trunk, crown small, less pests and diseases, good material, better urban and rural green tree species. However, because it has a white flower infertility, less seed and other defects, cutting propagation has become the main method for large-scale breeding. Our hospital in 1975 from Nanjing Institute of Forestry introduced a few dozens of trees, cutting test. At the same time, Chuansha, Songjiang, Jiading and Baoshan counties in our city also successively introduced and cultivated. According to our preliminary tests, it has been shown that the Mexican taxodium started to fall from the end of May and cuttings can be cut in summer, autumn and winter (in June, September and November in greenhouse). In early June, summer cutting and greenhouse cutting in November are better. Shanghai suburbs of Chuansha County Yangjing nursery from early May to November month and month cuttings and Songjiang County Xinqiao Brigade New Territories team greening team also made the same season cuttings, the rooting rate of more than 70-80%. Our specific practices and experiences are as follows: