In order to prevent cold, try to build a shed and put smokeless charcoal cans on the beehive. Today's results show that a box of bees is burnt out, and strawberries seem to have no gas loss.

We use alcohol for emergency here. Flammable, high heat and pollution-free. A good way to practice for many years. You can use solid alcohol and put it in a paper cup, which is convenient and quick. In addition, multilayer covers (quilts, straw mats, etc. ), multi-layer film cover (middle shed and middle shed cover small shed), and snow-proof cloth is covered outside the shed to strengthen heat preservation. Crops can be sprayed with potassium dihydrogen phosphate or Cui Kang Sheng solution, and also can be sprayed with Bihu or brassin to enhance the low temperature resistance of crops.