(1) Site selection and site preparation: Choose fertile, loose, well-drained plots. Cuttings and nursery land still need to be watered to facilitate irrigation, planting sites to select high-desert dry place. According to the original fertility of the land, the basal fertility and tillering of the multitude were to be made into a width of 1 to 1.2 meters and a height of 25 to 30 centimeters, with a 30-centimeter gap. (2) Propagation method: 1 root method: After harvesting the chrysanthemum, select robust plants, cut off the remaining stems, and use horse dung or earth miscellaneous fertilizer to cover the warm winter, so that the root buds will spring early and spring. In the spring of March and April, when the new seedlings germinated, the covered soil was split and accelerated. From late April to early May, when the seedling height is about 20 centimeters, all of them will be excavated and new seedlings will be planted. On the earthworms, a hole with a spacing of 50 cm, a spacing of 30 cm, and a depth of about 10 cm was digged, and 1-2 seedlings per hole were planted, and the soil was compacted. 2 cutting method: The mother plant of the selected species and the overwintering method are the same as the rooting method. In late April, when the seedling height is 15 to 20 centimeters, it is cut along the ground. From the middle, a thick seedling with a length of more than 10 centimeters is selected. The bottom 2-3 leaves are removed, and the planting distance is 77 centimeters. Moisturizing and shading, new roots can be produced in about 20 days, and two new leaves can be transplanted after the cuttings are transplanted. The transplanting method is the same as the partial rooting method. (3) Field management: 1 Cultivating and weeding; after planting, seeing no wilting phenomenon in the afternoon, the seedlings have survived and can begin to loosen and weed. It usually takes 3 to 4 times and it will not be performed after budding. The mid-term herbicides were treated with Shuangcao Ke. See the instructions for use. 2Fertilizing fertilizer: When plant growth is vigorous after planting, thin and thin manure water is applied for about 1000 kg; when the pregnant buds start, 2000 kg of the above fertilizer is applied, and another superphosphate is applied 10-15 kilograms or 2% superphosphate water spray is used as foliar. top dressing. 3 Irrigation: After the planting, the plants need to be watered early, and keep moist to increase the survival rate. After the survival, the soil needs to be dry, promote the development of the root system, and control the leggy of the aboveground parts. At this time, it is necessary to drain water and reduce humidity in case of rain. 4 Topping: After planting and survival, when the seedling height is 15-20 centimeters, choose sunny topping, remove l-2 centimeters of shoot tip and promote branching. After that, every 2 weeks, once every 3 to 4 times, it will not be carried out after the end of July, otherwise it will be excessively branched and the head will be too small. 5 Prevention of pests and diseases: Leaf blight: also known as spot blight. Pathogens are a kind of semi-known bacteria that can occur in various stages of growth and are severe in rainy seasons. The first leaf of the lower part of the disease, diseased leaves appear near-round purple brown spots, the center gray. There was a small black spot on the late lesions (branch device). After the lesions are enlarged, the whole leaf is dry (not falling off). Control methods: control the water in the early growth stage to prevent madness from taking advantage of ventilation; timely drainage after rain, reduce soil moisture s at the early stage of disease, remove diseased leaves in time, and burn and use 1:1:100 Bordeaux mixture or 50% mancozeb. 800? Loo fluid spray. Locust: began to occur in late April. It can be sprayed with 40% Dimethoate EC 200 times spray or 25% Triazolam 1500-2000 times spray.
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