Before the emergence of the seedlings, they should always be kept moist. Seedlings with simple shades do not need to be watered after they are thoroughly irrigated because they evaporate less. For seedlings without shade, due to high temperatures and large amounts of evaporation, care should be taken to pour small water in the morning or evening. Usually 1 to 2 days once. Early spring or winter nursery, generally do not need to water, to prevent lowering the temperature. After emergence, the first true leaf must be frequently watered. Keep the surface moist and prevent the sun from hurting the seedlings. Usually 2 to 3 days, pouring a small amount of water. When the seedlings grow to 3 to 4 true leaves, the roots begin to expand, water absorption capacity gradually increases, and the number of waterings gradually decreases. See the see-saw dry and wet to promote the development of the root system and accelerate the differentiation of young leaves. If watering is too much, it will easily lead to seedlings being unduly long, which is not conducive to cultivating strong seedlings After 2 to 3 true leaves, 2 to 3 top dressings can be combined with watering. The amount of top-dressing should be based on the principle of “few mealsâ€. In general, 0.25 to 0.5 kg of urea or ternary compound fertilizer is applied to each nursery. According to the seedling condition, it is also possible to combine the control of aphids with 1 to 2 foliar fertilizers at the seedling stage. Greenhouse Drip Irrigation System Fertigation is using your irrigator to fertilise the plants and soils as you water, which is the most efficient and advanced practice of fertilization. Aid of pressure system (or natural divide terrain), the soluble solid or liquid fertilizer, according to the soil nutrient content and crop fertilizer regularity and characteristics of species, with the fat of with irrigation water, through a controlled water supply pipeline system, supplying, the compatibility, water through the pipe and drop head form drip irrigation, uniform, regular, quantitative, infiltration area crop root growth and development, make the main root soil always stay loose and appropriate moisture content, at the same time according to different crop fertilizer characteristics, environment and soil nutrient content in soil; Crops in different growth phase water requirement, the different development stages of the fertilizer rule is the demand of design, the water and nutrient timing quantitative, provided directly in proportion to the crops. Greenhouse Drip Irrigation System,Greenhouse Micro Irrigation System ,Plant Drip Irrigation JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.engreenhouse.com