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How to plant and manage small cypress trees
In the growing season, cypress should start to promote branches in time to form a complete shrub. Generally, when plants grow to about 10cm, it is advisable to start heading, and then hit the head every time the new shoots grow to about 10cm, so that the height of seedlings should be controlled at about 30cm when they leave the nursery. At the same time, the sprout of rootstock should be cut off in time to avoid nutrient loss. Longbai likes big fat water. Combined with irrigation after planting, topdressing should be done 2-3 times in the first year, with urea 15kg per mu each time, and fertilization should be stopped after autumn. In the early spring of the following year, combined with watering green water, compound fertilizer with slightly higher nitrogen content, 40 kg per mu, was applied by furrow application. Because Sabina vulgaris has shallow roots and many horizontal roots, furrowing and fertilizing should be adopted to avoid root damage as much as possible. In summer, topdressing urea 2-3 times, 25 kg per mu each time. In addition to manual weeding, herbicides can also be used. In the nursery where there are many gramineous weeds, the mixed spraying effect of Jinduer and pointed hoe is better. The dosage per mu is 96% jinduer EC 100ml, and sharp-leaf hoe is 35ml( 10.8% quizalofop-ethyl EC). Longbai is prone to diseases and insect pests such as red spider, damping-off disease and dead branch disease. Therefore, we should pay attention to frequent observation to achieve early detection and prevention. To control red spiders, 3000 times of 20% acarbose EC, 5000 times of 1.8% acaricide EC or 3000 times of 15% dazione EC can be sprayed alternately. In the early stage of damping off, 70% thiophanate-methyl wettable powder can be used to irrigate 700 ~ 800 times; The control of dead branch disease can be sprayed with 50% wettable powder or 70% chlorothalonil wettable powder 1000 times.