First, the trunk of white or white spray on the trunk, backbone stick white, whitening agent formula is: lime 10 parts, 1 to 2 parts of salt, water 35 to 40 parts, plus 1 to 2 copies of raw bean juice to Increase adhesion. Second, to improve the orchard's microclimate 1. Heating method: Place a heater at a certain distance in the orchard, and ignite and warm it before freezing damage occurs, so that the lower air warms and rises, while the upper air with higher temperature drops, A heating layer is formed around the fruit trees, generally increasing the temperature by 1~2°C. 2. Smoke smoke method: According to the weather forecast and actual measured temperature in the orchard, use sawdust, wheat bran, stalks, orchards, weeds and defoliation, etc. to be stacked alternately for fuel. After stacking, press thin layer of soil or use smoke (2 parts of ammonium nitrate) , 7 parts of sawdust, 1 part diesel blended, wrapped in a paper tube, plus a damp proof film) to ignite the fumes. The stacks are placed at the outlet of the orchard, typically 4-6 piles per acre orchard (the size and size of the stack depends on the frost intensity and duration). Smoke time generally starts from 0:00 pm to 3 am the next day. Dark smoke is suitable to make the smoke diffuse throughout the orchard, and until the morning light can stop smoking. 3. Tree trays Cover grass: cover trees with weeds, thickness of 20 to 30 cm.
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