1, stop the measures to promote the growth of the upper part of the seedlings. During this period, we should strictly prohibit the pursuit of quick acting fertilizer and prevent seedlings from growing. However, phosphorus and potassium fertilizers can also be applied to promote the lignification of seedlings and form strong spores. In this period, from September, every ten days to half a month, we can use the potassium hydrogen phosphate 1 +0.3% of the potassium dihydrogen phosphate to spray the leaves and spray three times. Or plant ash each time 4-5 mu per mu, continuous two times. Spraying boron on the leaf surface improves the cold resistance. Starting from September, sprayed with borax solution of spring rain 1 +0.5% or mixed with potassium dihydrogen phosphate every 10 days. Three times.
2, the management of the garden. In autumn and winter, it is necessary to clean up the nursery land in an all-round way, dredge and excavate the drainage ditch, combine pruning and pruning, cut off the dead branches and diseases and insect branches, and remove the dead plant and clean the litter and weeds in the nursery. We should strengthen the prevention and control of diseases and insect pests, and carry out comprehensive pest control in the whole garden during the dormant period with the mixture of 2-5 degrees of sulphur and sulphur.
3, do a good job of cold prevention and cold resistance. The concrete measures are as follows:
(1) irrigation and antifreeze. On the eve of the frost, irrigation in the nursery area can make the soil temperature not less than 0 degrees.
Fumigating smoke and preventing cold. In particularly cold weather, there are 2-3 smoke pits around the nursery. When the temperature drops to 0 degrees C, smoke is lit and the smog goes up until sunrise.
③覆盖：多用于圃地露地JDG金属穿线管 不锈钢链板 隔离墩模具 检查井钢模具 流水槽模具 阶梯护坡模具 护坡砖模具 遮板模具 花卉，在霜冻前，在地上覆盖干草、草席等，此法既经济效果又好，应用极为普遍。另外也可覆盖塑料薄膜等材料，但需要有一定的经济条件。
Coverage: it is mainly used for flowers in the open field, covering hay and straw mat before the frost. This method is both economical and effective, and is widely used. It can also cover plastic film and other materials, but there must be some economic conditions.