Cold winter, we need to carry out some tree pruning country. This is so because the need to repair Sophora been dense branches, diseased branches, and dead branches. Let pagoda in bad weather can not have a big damage. When the pagoda canopy vigor unbalanced high part of the branches to be cut or reduced stub trunk. Winter pruning should pay attention to avoid cold weather. When the temperature is too low pruning branches wound healing, recovery will affect the growth of trees. So, in early spring should be pruned in winter Sophora japonica warmer weather when Sophora japonica root before entering the exuberant activities. Because the roots of trees before bud shoot well into the growing season. At this point, autumn return nutrients to the roots start from the roots up delivery for germination pumping flowering branches and flowers in the book needs. Pagoda tree trunk painted white for winter, trees can freeze prevention, burns and insect pests, is conducive to safe winter trees, natural trauma from the outside world. Tubai agent, the main raw material is lime, salt, sulfur and water. Lime and sulfur can freeze, anti-burning, disease prevention, pesticides; lime salt helps to penetrate the bark, retain moisture and prevent cracking of lime peel. Sophora japonica seedlings cultivated in the winter time, Sophora japonica seedlings need to increase resistance to cold. Appropriate organic fertilizer in the growing season Sophora japonica, reasonable pruning, promote robust growth of plants, and just before winter to reduce the use of nitrogen fertilizer, proper application of P and K, increase resistance to cold. Another irrigation soil moisture in cold regions, cold winter soil layer deeper, plant roots have cold dangerous. Can be frozen in the soil before irrigation flooding once the soil has more moisture, soil temperature fluctuations smaller winter soil temperature would not drop too low. 

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