1. The base fertilizer should be based on the organic fertilizer, phosphorus and potassium fertilizers, and the sandy soil should be supplemented with calcium, magnesium, phosphate, calcium phosphate, calcium nitrate and other calcium-containing fertilizers; the old vegetable garden and the heavy soil should be added with lime, every year. The amount of calcium applied per mu is 1.67 to 3.33 kg. 4. Adding organic fertilizers Organic fertilizers are rich in organic matter and various nutrients required by crops. They are a complete fertilizer and have a unique effect on improving soil and fertility. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone 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.engreenhouse.com
2, foliar fertilization plus 1 ~ 2 kg of superphosphate per 100 kg of water, stirring for half an hour, and then soak for a period of time, the above supernatant can be sprayed, also choose amino acid calcium, calcium humate, biological calcium fertilizer Etc., spraying at the peak of the absorption of calcium in vegetables.
3. Scientific application of nitrogen and potassium fertilizers has an antagonistic effect between ammonium ions and potassium ions and calcium ions. When the content of ammonium ions and potassium ions in the soil is too high, and the ratio of nitrogen to calcium is too high, the absorption of calcium can be inhibited. The amount of nitrogen and potassium fertilizer should be properly controlled, and scientific fertilization should be carried out to avoid the phenomenon of excessive nitrogen and potassium fertilizer.
5, the appropriate amount of boron fertilizer to promote the amount of boron can promote the transport of carbohydrates into the roots, promote new roots, is conducive to the absorption of calcium, in the soil calcium and foliar spray can be mixed with the right amount of borax .
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.