One is to apply basic fertilizer. Generally, 4 to 5 leaves of maize should be applied to the seedlings, that is, nitrogen, phosphorus and potassium compound fertilizers 10 to 15 kg/mu. Pay attention to the combination of nitrogen, phosphorus, and potassium fertilizers. At the same time as reasonably applying fertilizer, timely watering and timely cultivating and weeding can promote the healthy growth of corn, enhance disease resistance, and eliminate the host and reduce disease. Planting density should be appropriate, do not arbitrarily increase the density, to increase field permeability. It is necessary to vigorously popularize the techniques of dry sowing and formula fertilization. Dry sowing can make maize cultivated at the seedling stage, with many roots, deep roots, and strong seedlings. Formula fertilization, increased nitrogen, phosphorus, and potassium fertilizers, make maize plants robust, rapid, and enhance disease resistance. The second is chemical control. Attention should be paid to early prevention. In the 4 to 5 leaf stage of maize, use 25% triadimefon 1500 times foliar spray per acre, or 50% acetaminophen wettable powder 1500 times, 12.5% ​​pods. Lee's wettable powder 1000 times, 50% carbendazim wettable powder 500 times, can prevent the occurrence of corn brown spot. In order to improve the control effect, some potassium dihydrogen phosphate, urea, etc. can be properly added to the drug solution, combined with the application of quick-acting fertilizers, which can control the spread of disease, promote the robustness of corn plants, and improve the disease resistance of corn. According to the current rainy weather characteristics, spraying bactericide should be 2 to 3 times, 7 days apart, within 6 hours after spraying, the following rain should be added after the rain, to maximize the control of corn brown spot. In addition, the application time should be before 10 o'clock in the morning, after 4 o'clock in the afternoon, to avoid the application of high temperature time. Glass Venlo Greenhouse is Spire-type glass design, design and installation of windows when more convenient and easy. Its roof slope andle can be appropriately according to the local real climate change the environment. Glass Venlo Greenhouse,Flowers Glass Greenhouse,Nursery Glass Greenhouse,Vegetables Glass Greenhouse JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com
In Venlo greenhouse, foundation is made of reinforced concrete and the side wall is made of brick or reinforced concrete plate. the steel frame always use hot dip galvanized light steel. Roof beam adopts horizontal girder structure and using herringbone connection. The horizontal girder bears 2 or more roofs, which is made of aluminum alloy. This material is used as roof structure material and also glass inlay material. Other beams using gutter style to minimize the section. Delighting material of the roof and side wall using 4 mm thick float glass.