First, low temperature germination: summer lettuce growth period is high temperature season, so must use heat-resistant varieties. Before germination, first germination, soaking seeds with cold water and adding new high-fat film (improving seed germination rate) for 8-12 hours. When the water absorption rate of the seeds reaches 70% to 80%, wrap it with wet gauze and keep the temperature at 4-5 °C. After -28 hours, it is placed in a suitable temperature condition of 15-20 °C to moisturize and germination, and most of the seeds can be sown after 2-3 days.
Second, seedling transplanting: summer lettuce shoots at the end of June, early July, when seeding, the best seeds mixed with appropriate amount of dry fine soil re-broadcast, shallow sowing after the sowing, with straw curtain scaffolding shade seedling, seedling stage combined with watering After 2-3 times of dilute water manure, the seedlings can be transplanted when there are 4-5 true leaves in about 25 days. After the seedbed is watered, the seedlings are transplanted with soil, the plant spacing is 25 cm, the row spacing is 35 cm, and 700-800 plants are planted every 667 m2. After planting, the root water is poured, and the diluted water manure is poured once every 2-3 days. The new high-fat film is sprayed on the surface of the plant to prevent the infection of the bacteria, improve the ability to resist natural disasters, increase the photosynthesis intensity, and protect the seedlings. growing up. Third, fertilization and watering: summer lettuce has shallow roots, weak absorption capacity, coupled with rapid growth in summer, requiring more fertilizer and water, special attention should be paid to heavy fertilizer water management. After the seedlings are alive, the damp water manure is applied in combination with drought resistance every 3 to 5 days. When the stem begins to expand, the water is poured and the strong stems are sprayed at appropriate time, which makes the stems of the plants strong, the leaves are thick, the leaves are fresh and the plants are flourishing. The leaves were sprayed with 0.3% potassium dihydrogen phosphate 1 to 2 times. If you find downy mildew, in the early stage of the disease, spray the nail cream treatment.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Poleline Hardware
Yokelink supply a full line of Poleline Hardware, we offer from the top of the pole to underground.
Yokelink Flat Crossarm Brace used to support wood cross arms carrying tangent loads. Round corners on the brace ends prevent damage and reduce the possibility of injury. Hot dip galvanized meet ASTM A153 specification.
Yokelink Alley Arm Brace used for side-arm construction, mounted to one side of the pole, mount at a 45 degree angle and come complete with solidly riveted lineman step. Hot dip galvanized meet ASTM A153 specification.
Yokelink Insulator Brackets are used to mount post type insulators from 15kv to 34.5kv on the side of the pole. Hot dip galvanized meet ASTM A153 specification.
Yokelink Cutout and Arrester Brackets are used for strength and mounting a variety of electrical equipment including arresters, cutouts, combination units and terminations. All components are Hot dip galvanized to meet ASTM A153 specification.
Line Construction Hardware,Steel Insulator Bracket,Insulator Hardware Bracket,Transformer Mounting Brackets
Ningbo Yokelink Machinery Co.,Limited , https://www.yokelink.com