Seedling management points
æž¸æž The whole seedling period is about one year. We should pay attention to the following management contents. Let us first look at what needs to be done in spring and summer.
Breaking the membrane: After the seedlings survive, we must first break the membrane, cut the seedlings, and directly pierce the membrane by hand. The seedlings must be hard-branched and inserted through the membrane at the point where they will sprout. In order to avoid the high temperature when discretionary injury seedlings. Afterwards, we do not need to uncover the plastic film and let it continue to increase the temperature of the earth. When the hot season comes, the mulch can degrade and rot into the soil.
In the past, we have used basal fertilization. Therefore, during the growth period from April to June, we need not use too many management tasks to allow the seedlings to grow naturally. However, in July, when the seedlings grow to a certain height, they should conduct a series of management work.
Weeding ripping: When the seedlings reach a height of about 30 cm, the first loosening and weeding are performed to prevent the growth of grasses over the seedlings. Weeding should grasp the principle of early weeding and removal. Slip soil is combined with weeding work. During this period, we weeded and rived 2-3 times.
Trim the buds: When the roots of the seedlings grow out of the lateral branches, we must erase these lateral branches in time to avoid competing for soil and prevent the main branches from growing. The young shoots can be wiped off by hand. Older shoots should be cut off with a pruning shear.
Fertilization: In order to grow seedlings better, in the middle and late May, we applied a fertilizer to promote root growth. Phosphate fertilizers are preferred, supplemented by nitrogen fertilizers. Apply 10 kg of ammonium phosphate and 5 kg of urea per acre. Mix the fertilizer evenly and spread around the plants.
Irrigation: Irrigation after fertilization, flood irrigation, and irrigation can all be used to achieve adequate irrigation to meet the growing needs of the hot season. With good water and fertilizer conditions to promote seedling growth. Irrigate 4-5 times from summer to winter.
By September and October, in the well-managed nursery areas, the seedlings grew to a height of more than 60 cm, and they became large and vigorous seedlings. It also entered the autumn and winter season, when we need to carry out what management work.
Weeding: There are also many weeds in this period and we must do a manual weeding. Weeding should be shallow. Full weeding prevents weeds from robbing fertilisers, spreading pests and diseases. After weeding we also trim the branches once.
Pruning: Too many branches will hinder trunk growth and should be trimmed. When you trim, choose a strong branch as the main trunk and cut all the rest. To ensure that the trunk is thick and uniform. To reach 60 cm tall seedlings, cut off the main branches. Also called topping, control the height of seedling growth. Develop large seedlings with the first layer of lateral branches and special grade seedlings.
After pruning to ensure the nutrient supply of seedlings, we have to apply one fertilizer, mainly nitrogen fertilizer, supplemented by phosphate fertilizer. Spread two mixed fertilizers around the plants. Generally, 15 kg of urea and 5 kg of phosphate fertilizer are applied per acre.
Pest control: The pests and diseases in the seedling stage focus on prevention and control. It is mainly used to cut 2000-2500 times of liquid and 10% of imidacloprid 1000-1500 times. It is sprayed once every seven days in about mid-October and sprayed continuously three times to control locusts, cockroaches and embroidered cockroaches.
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