What is the tending management of Pinus koraiensis at seedling stage?
The tending management of Korean pine seedling stage is that the emergence stage of Korean pine takes about 20 to 30 days, and the germination is the most exuberant when the temperature is higher than 16 degrees Celsius. Attention should be paid to spraying water to prevent drought and bird pecking harm. In the seedling stage, the root grows faster, the main root can be up to 10 cm long, accounting for about 40% of the annual growth, and can grow 4 to 5 lateral roots. But the growth of seedling height is very small. Therefore, the resistance of seedlings is very poor, we should pay attention to watering cooling, prevent sunburn, and timely topdressing and loosening soil to weed. From the formation of the terminal bud of Pinus koraiensis seedlings to the decrease of growth rate, it lasted for about 2 months. The leaf quantity increases, the seedling stem thickens, the main root elongates, the lateral root grows massively, and the lateral root appears twice. If the amount of fertilizer needed for seedlings increases, it should be topdressing in time. And strengthen the management of ploughing, loosening soil and weeding. The seedlings of Pinus koraiensis in the same year are weak and can not be afforested out of the nursery (usually 2-3-year-old seedlings), so the overwintering protection of seedlings is very important. Pinus koraiensis is more resistant to cold, but is afraid of drought, especially the seedlings have germinated in early spring, but the soil has not yet thawed and can not supply water in time, resulting in physiological drought. Therefore, the method of covering soil and burying seedlings is often used to protect seedlings. The method is: first break the trail soil to bury the seedling stem, and then overwhelm the seedling with soil on one side, about 10 cm thick, with no seedling leaves for the degree, and pay attention to the lack of ventilation. The soil will be removed when the soil is thawed to a depth of more than 10 cm in the coming spring. In recent years, some people use warming agent to spray foliar to control foliar transpiration and prevent seedlings from drying up.
- Prev
Korean pine blister rust
Symptoms: the disease occurs in the skin of branches. At the initial stage of the disease, the susceptible skin swollen and softened slightly, and cracks began at the beginning of May, from which yellow-white blister cysts were produced, which was the sporidium of the pathogen. The sporophore matured orange in the first and middle of June. Since the middle of May, the cyst broke, scattered powdery spores, and finally left a membranous white coating, and gradually scattered and disappeared. By the end of June, most of the blister sacs had been broken, the old diseased skin was rough, and there was often a layer of coal fouling bacteria, showing black. Due to the disease year after year, the skin thickens and thickens, and turpentine flows out. Late August and September
- Next
needle drop disease of Korean pine
Needle drop disease of Pinus koraiensis is a common disease worldwide. The disease can infect from young trees to big trees, causing early defoliation, affecting growth and causing the death of diseased plants. Symptoms: The disease usually affects 2-year-old needles, and some 1-year-old needles can also be affected. At the beginning of the disease, small yellow spots or segmental spots were produced on the infected needles, and the whole leaves turned yellow and fell off in late autumn. In the spring of the following year, large, black or gray, long oval or elliptical protruding grains appeared on the infected needles, with paint luster and a longitudinal crack in the center, which were asci disks of pathogenic fungi. Some diseased leaves
Related
- Fuxing push coffee new agricultural production and marketing class: lack of small-scale processing plants
- Jujube rice field leisure farm deep ploughing Yilan for five years to create a space for organic food and play
- Nongyu Farm-A trial of organic papaya for brave women with advanced technology
- Four points for attention in the prevention and control of diseases and insect pests of edible fungi
- How to add nutrient solution to Edible Fungi
- Is there any good way to control edible fungus mites?
- Open Inoculation Technology of Edible Fungi
- Is there any clever way to use fertilizer for edible fungus in winter?
- What agents are used to kill the pathogens of edible fungi in the mushroom shed?
- Rapid drying of Edible Fungi