1. Artificial seed selection before sowing, removing diseased grains and insect-eaten grains, so as to improve seeding quality and seed viability. 2, nursery to select high-dry terrain, drainage and irrigation is convenient, fertile soil, good permeability, avoid continuous crops or on the same species of vegetables grown on the land plots, so as not to cause soil-borne diseases, and avoid pests in the ground Severe land plots have occurred. After selecting the plots, a fully decomposed farmyard manure should be applied as the base fertilizer. According to the specific varieties of vegetables, an appropriate amount of ternary compound fertilizer and a small amount of trace fertilizers should be added, and shallow plowing should be performed once. 3, the bottom water must be enough, the cover should be thick. Before seeding, the seedbed is usually poured with enough water, and the soil layer covering the seed thickness is 6-8 times after sowing. For vegetable seeds that are weak in germination, such as alfalfa, lettuce and celery, they can be covered with weeds, corn leaves, newspapers, and other shades (removed in time after emergence). When the seedbed is in drought, sprayers are used in the morning or evening. Spray water on the seedbed to increase the humidity of the surface, which will help the seed germinate. 4, after the broadcast to shade, to prevent sun heat against heat. In the summer, the solar radiation is strong. The temperature near the ground and the ground temperature change drastically. It is extremely unfavorable to the growth of young seedlings. It even causes burns and dead seedlings. Therefore, it can be covered with a silver-gray or black shade net, and some straws can be scattered on it. In this way, the effect of sun protection and high temperature is better, but the straw cover can be removed after the weather turns cold. 5, spraying drought and drought. Summer vegetable seedlings, drought threat is also one of the unfavorable meteorological factors, therefore, should pay attention to keep the bed soil wet and dry, if the topsoil is white, it is necessary to spray water to the seedbed in the afternoon, drought relief, spray water once every other day, to maintain The surface soil is moist to meet the moisture requirements of the seedlings. Of course, it is also necessary to control excessive watering to prevent Leggings from becoming leggy and unfavorable in cultivating high quality and strong seedlings. 6. For seeds with weaker top soil capacity, about 20% of other seeds that germinate faster can be mixed during summer seedlings and mixed at the same time. Such as sowing celery and lettuce can be mixed with some cabbage seeds, so cabbage seedlings emerge quickly, when the top pine soil is conducive to the emergence of celery, lettuce and other seedlings, and the rapid growth of cabbage, seedlings play a seedling shade. After the celery and lettuce seedlings emerged, they gradually pulled out the sown cabbage seedlings. 7, Appropriate time seedling prevention leggy. As the seedbeds are sowed in many cases, it is difficult to achieve uniform sowing, so the emergence is always uneven, coupled with high summer temperatures, rapid growth, prone to slender delicate high seedlings. Therefore, it is advisable that the seedlings be prevented from growing in time so as to cultivate strong seedlings. 8, do a good job of pest control. Summer vegetable seedlings are most vulnerable to aphids, cabbage caterpillars, damping-off, blight and virus diseases. Therefore, we must attach great importance to the prevention and control of pests and diseases. Control of locusts can be used to kill fleas, chlorimiphene EC, Kung Fu EC, Uranus EC and other agents spray control. The cabbage caterpillar can be sprayed with an insecticide such as trichlorfon and diflubenzuron. Bacterial damping-off and damp-blight can be controlled by sprays such as Precore or Bader. Virus disease can be controlled by phytopathogens, viruses, and other agents. The key to the above pests is early prevention and early treatment in order to receive the best results. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Xinhui Jielide Garment Factory , https://www.ntgfwear.com