How to protect boxwood planted in hot weather?

Drought and lack of rain, large evaporation, if the water supply is insufficient, will seriously affect the survival rate of seedlings. After planting seedlings, the soil between rows can be ridged every 4 ~ 6 rows to facilitate irrigation. It is required to water the seedlings for the first time within 24 hours after sowing, for the second time every 3-5 days and for the third time every 5-7 days. After three times of irrigation, it can be decided whether to irrigate according to the weather and seedling conditions. The amount of water should not be too large or too small. If there is too much water, the soil will become soft and the seedlings will easily lodging. Too little water affects survival. After irrigation or heavy rainfall, seedlings are prone to lodging, tilting or exposing their roots. If this happens, it should be straightened, ridged and covered immediately, otherwise, with the germination and growth of seedlings, the seedlings will become bent in a few days. When supporting the seedlings, you can dig up the soil near the roots of the seedlings, straighten the seedlings, find the direction between the straight line and the plants, and then return the soil to be practical. After planting seedlings three times in a row, when the soil in the seedbed sinks and pits appear, it should be leveled and filled in time. It can also be combined with intertillage to level the ground, so that the seedlings can get the same amount of water and prevent uneven drought and flood. Poplar likes water, so it is necessary to master the principle of "rather wet than dry" when watering. At seedling stage, the root system is shallow and sensitive to water. Generally, the surface soil should be kept moist, and a small amount of irrigation should be carried out many times. In the fast-growing period of seedlings, the growth is rapid and the water demand is large, so it should be irrigated with large water to make it dry and wet clearly and thoroughly. However, irrigation should be stopped in the late growth stage to prevent seedlings from growing white and promote lignification. Generally, watering should be controlled at the end of summer. Irrigation time: it is best to water it once in the morning and once in the evening, not at noon when the temperature is the highest.