Antifreeze and post-freeze treatment of fruit trees
Antifreeze measures for fruit trees 1, earth and bag trunk. To deal with the weaker evergreen fruit trees, especially saplings, we can use soil and trunk dressing. Generally about 10 cm of soil is cultivated. Wrap the trunk with straw or plastic film. 2. The trunk is painted white. Using lime and water and a small amount of salt to mix and brush the branches of fruit trees can reduce the freezing injury. In the whitening agent can be properly added insecticide or copper sulfate, can effectively kill overwintering eggs and bacteria. 3, canopy cover. Conditionally, before the advent of cold air, covering the canopy with plastic film or straw, etc., has a good effect on reducing freezing damage. 4, orchard smoke. Use sawdust and chips as fumigant, place 2-3 heaps per acre orchard, ignite before cold air arrives, (note non-combustible open flame) can increase the temperature 1 °C -2 °C, effectively reduce the freezing injury. 5, orchard irrigation. Conditional orchards, before the advent of cold air, can carry out irrigation or sprinkler irrigation in the orchard, which will help to reduce the freezing damage. 6. Trim. The late autumn shoots and unaged shoots of fruit trees must be trimmed in time to avoid freezing. Fruit freeze treatment Once frozen, fruit trees must take timely measures to strengthen management and restore tree vigor to reduce losses. The measures include: 1. Loose soil. After the freezing injury, the soil shall be loosened under the canopy in time to keep the geothermal energy, increase the soil temperature, and facilitate the growth of the root system. 2. Fertilization. After freezing, the function of the tree is significantly weakened. The ground can be diluted with ground water. After the new leaves are unfolded, the leaves are sprayed with a mixture of 0.5% urea and 0.3% potassium dihydrogen phosphate and sprayed every 7-10 days. 2- 3 times. 3. Timely control of pests and diseases. After the fruit trees are frozen, the tree vigor is weak, and diseases and insect pests such as anthrax and spider mites are easy to occur. 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
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.