The management of the transplanted young seedlings after transplanting of Zhongshan Shanshan not only concerns the survival rate of transplanting, but also relates to the quality of growth. Its management contents and methods are as follows:
Water and fertilizer management and weeding soil
Zhongshan Shanshan is a fast-growing good clone, which is hi wet and fat-tolerant. Therefore, good water and fertilizer management is one of the important measures that Sun Yat-sen can fully exert its fast-growing characteristics. Water management In addition to pouring enough water during transplanting, in the entire growth period after survival, in case of drought should be timely watering drought. In addition, in addition to sufficient base fertilizer, in the growth period should also be based on the growth of seedlings, timely topdressing quick-acting organic fertilizer or fertilizer, and promote vigorous growth of seedlings.
After transplanting the seedlings to survive and grow, timely weeding of the grass can promote the rapid growth of seedlings. However, in the initial stage of transplanting seedlings, only loose soil. When weeding the soil, we should not loosen the soil around the roots so as not to affect the restoration of the original roots and the growth of new roots. When the root system recovers and the ground part begins to thrive, it can be combined with yarrow to loosen the soil. After the rain or after irrigating, the ripper can be harvested to facilitate seedling growth.
Pruning, standing and strengthening
The root seedlings of Zhongshan Shanshan were inserted into the seedlings, most of which were seedlings without shoots. Generally after transplanting, the shoot buds germinate into lateral branches, and the lateral branches close to the top gradually form an upright growing seedling stem due to the apical growth advantage. However, some seedlings are not easy to form upright growth stems in the year they are transplanted, and there is a certain degree of eccentricity or skewness. They need to be trimmed, cut off too many lateral branches and curved branches, and promote the germination and growth of the top buds. Develop upright and growing shoots as trunks. If necessary, you can also insert bamboo rafts or branches next to the seedlings to carry out traction and righting, so that they can stand upright and grow upward. If the seedlings of the upright trunk, which cannot be formed in the year of transplanting, can be cut and trimmed again in the spring of the second year, they are left to stand upright and cultivated as the main trunk for normal growth.
Seedling Pest Control
The disease and insect pests in the seedling stage are generally less, but under certain environmental conditions, diseases or insect pests of different degrees may also occur.
Prevention of yellowing
Yellowing disease, also known as chlorosis, is a physiological disease. The Chinese fir is planted on alkaline earth and saline soil, and the chlorotic chlorosis of branches and leaves often occurs. Because of the lack of soluble iron ions that can be absorbed and utilized by plants in this type of soil, when the content of the soil is low to a certain extent, it causes iron deficiency and chlorosis in the branches and leaves of the Chinese fir tree, physiological yellowing occurs, and light affects growth. Severe or even yellowing death. The method of prevention and control: When choosing the transplanting ground, the ruler may choose to transplant the soil with lighter alkali or saline alkali, or add calcium phosphate and organic basal fertilizer during soil preparation to reduce the soil pH value. When the disease occurs, it can be watered with a 1:80 ferrous sulfate solution. When watering, prevent liquid medicine from spilling on branches and leaves. If not, rinse with water immediately to avoid injury. It is also possible to use 0.5% to 1.0% of the ferrous sulfate solution to spray the leaf surface treatment, and promote the absorption of foreign human elements on the leaf surface to make it turn green and restore normal growth.
Prevention of major pests
Earthworms and earthworms are the main pests of the young seedlings of Central Asian pine and they feed or bite off the seedlings. Control methods: In addition to the removal of weeds in nursery areas and the prevention of the source of food for the overwintering adult lay-up sites and first-generation larvae, we can infuse 80% of the soil in the vicinity of the victim’s special correspondent when the damage occurs. 100 insect soluble powder 500 liquid, toxic insecticide; severe damage, can be flooded (flooded for 24 hours). Prevention and control of the ground tiger: In the preparation of a transplanting bed, 5% phoxim granules are used to treat the soil and 7-8 kg per acre are applied. When the damage occurred, visit the fields before sunrise, excavate the ground tiger hiding in the cave near the victim plant, or perfuse more than 90% of the trichlorfon crude drug 800-1000 times or 80% dichlorvos cream into the cave hole. 1000 times to kill. Leaf-feeding pests are mainly larvae of bag moths (commonly known as hanged ghosts), which mostly occurred in July-August. When it happens, it can be sprayed more than 90% in the morning and evening. The original drug of trichlorfon is poisoned by 1500 times. When a small amount of damage is caused, it can also be manually removed and killed.
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