Survival rate is the percentage of survivors to the total population.
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The survival rate of planting trees means that some trees planted lead to death and some survive, and the influencing factors are various. People use the ratio of the number of surviving trees divided by the total number of trees planted as the survival rate. In mathematics, proportion refers to the proportion of the number of parts in a population to the total number, which is used to reflect the composition or structure of the whole and make relevant evaluations.
For example, if 120 trees are planted, 1 trees die for various reasons, and 1 19 trees survive, then the survival rate of these saplings is: (119 ÷120.
Improve the survival rate of tree planting:
First of all, you should take a soil ball with you when you dig the stump of a sapling. When digging seedlings in the nursery, the soil in the seedling field is dry and should be watered before digging. Try to bring soil balls and try not to hurt the roots. After such saplings are planted, they survive quickly and have a high survival rate. The soil balls carried by saplings must be firmly bound with packaging materials, so as to avoid damaging the root system and affecting the survival rate during handling.
Second, the seedlings should be planted. When planting saplings, the pit should be dug as deep as possible, and the soil at the bottom is loose, which is conducive to the survival and later growth of saplings. When planting, the soil around the seedlings should be compacted to make the roots fully contact with the soil, which is beneficial to absorb water and take root and survive. After planting, there should be a circular water tank around the seedlings for watering the planting water.
Third, after the seedlings are planted, they should be watered with sufficient planting water. After the saplings are planted, it is necessary to look at the degree of soil dryness and wetness, and pour enough planting water. When the soil moisture is high, or when it rains, watering is enough. The soil is dry, or on sunny and dry days, water more often. If you water it once every 1 ~ 3 days, you can water it 2 ~ 3 times and you will survive.