It is better to start the seedlings in the spring and it is necessary to raise seedlings before the seedlings begin to sprout. For example, the time for the emergence of eucalyptus should be selected from the second year of eucalyptus, and the emergence of new shoots should be prominent until the buds appear pale green, that is, from mid-November to March of the following year. If sprouting after opening buds, will greatly reduce the survival rate of seedlings. In the autumn, the seedlings should be grown after the growth of the seedlings at the top of the seedlings. The roots are growing. If they can be planted in time after the seedlings are raised, they can begin to grow earlier. In addition, spring-up seedlings can reduce the number of pre-arrangements.
Firstly, the depth of seedling growth should be based on the root distribution of tree species. If there are few roots out of seedlings, the survival rate after planting should be low or the growth should be weak, so rooting should be minimized. Dig far from the beginning and end, if the fruit tree seedlings generally from the seedlings next to 20 cm deep planing, the main lateral root length of seedlings to maintain at least 20 cm, be careful not to damage the seedlings cortex and bud eyes. For the long main roots and lateral roots, it may be cut off due to inconvenience in digging, and avoid hand picking.
The second is to raise water before planting. Due to the drought in winter and spring, the nursery soil is easy to compact and it is difficult to raise seedlings. It is best to water the nursery 4 to 5 days before the seedling raising, so that the nursery stock can suck enough fertilizer and water in the nursery to have more abundant nutrient reserves, but also to ensure that the seedling roots are intact and enhance the ability of the seedlings to resist drought.
The third is to bring earthballs when digging seedlings. When raising the seedlings, bring the soil ball to the root, and the diameter of the earth ball can be 6 to 12 times the diameter of the root. Avoid exposing the root to air and losing moisture. Precious tree species or trees can also be wrapped in straw ropes to prevent earth ball scattering. At the same time, after planting, it is closely connected with the soil, and the roots can resume absorption function quickly, which will help improve the survival rate.
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