二、新品种的育成 (一)播种育苗菊花种子无休眠期,在适当的环境条件下,成熟的种子可随时播种出苗。以夜温15℃、日温25—30℃的条件比较适宜,6天即可出苗,过低或过高都不利于发芽。为保证当年开花进行初选,可在满足这个条件的前提下,于1月间播种。如是露地播种,长江流域以3月下旬为宜,太迟则当年不易开花。育苗场所要因种子多少而异。如果数量多,可用苗床育苗。即选背风向阳、通风排水良好处,设置宽1米南向的单斜面温床,其方法同一般温床。床内的蚯蚓和地下害虫要除去,床上可用消毒过的肥沃园土4份与沙6份混合作基质,铺入时要将土块打碎,并用木板刮平,而后充分喷水,以透而不流为度。因种子细小,播种前要先将种子与细沙或草木灰混合,再均匀撒播于床上,其上再撒一层细培养土,盖没种子 Second, the breeding of new varieties (A) sowing seedlings Chrysanthemum seeds without dormancy, under appropriate environmental conditions, mature seeds can be sown at any time seedlings. Night temperature 15 ℃, day temperature 25-30 ℃ conditions more appropriate, 6 days to emergence, too low or too high are not conducive to germination. In order to ensure the flowering of the year primaries, under the premise of meeting this condition, sown in January. In the case of open field planting, the Yangtze River valley should be suitable for late March and too late for flowering. Nursery sites vary according to the number of seeds. If the number of seedlings available nursery. The selected leeward sunny, good ventilation and drainage, set a width of 1 m south to the single bevel hotbed, the method with the general hotbed. Earthworms and pests in the bed to be removed, the bed available sterile garden soil 4 and 6 mixed with sand as a matrix, when to be broken into the soil block, and use wood scraping, and then full of water to thoroughly Not flow for the degree. Due to the small seeds, before sowing, the seeds should be mixed with fine sand or ash, and then spread evenly on the bed, and then spread a thin layer of soil on top, covered with no seeds