How long can Sophora japonica be absorbed by fertilization?

June to July is a very suitable season for Sophora japonica to grow, because of the high temperature. At this time, irrigation and fertilization can effectively promote the absorption of phosphorus and potassium nutrients by roots, and further promote the rapid development and formation of Sophora japonica seedlings. It is very important for this tree species to get water throughout its growth cycle. 1. Fertilize organically in summer. Don't apply too much fertilizer once per mu, about 2000kg is appropriate. In addition, fertilization should be carried out after irrigation. Nitrogen fertilizer and urea can be added after the weather turns hot. This can provide enough nutrition for the roots and promote their upward trend.

2. In addition, the seedlings should be fertilized according to a certain proportion. Don't think that it is good to fertilize more, so as not to burn the roots of seedlings. ?

3. The watering times of Sophora japonica seedlings should be determined according to climatic conditions, soil texture and other factors. In general, water should be poured 2 ~ 3 times from emergence to rainy season, and frozen water should be poured 1 time before the nursery freezes. In case of waterlogging, drainage should be carried out in time. Before sowing, apply base fertilizer, mainly organic fertilizer or Woye compound fertilizer, to mu of nursery land.

April is a very suitable season for fertilizing Sophora japonica, because the temperature is gradually rising and the frozen Sophora japonica in winter is gradually waking up. At this time, irrigating Sophora japonica and applying spring fertilizer can effectively promote the root system to absorb phosphorus and potassium nutrition, and further promote the rapid development and molding of Sophora japonica seedlings. It is very important for the whole growth cycle of this tree species.

Fertilization in spring should be based on organic fertilizer, and it is best not to apply too much per mu at a time, about 2000kg. In addition, fertilization should be carried out after spring irrigation. Nitrogen fertilizer and urea can be added after the weather turns hot. This can provide enough nutrition for the roots and promote their spring harvest.

Three-year-old Sophora japonica is better to fertilize from April to August; It is best to apply diammonium phosphate compound fertilizer (or ternary compound fertilizer). Ditching should be carried out at the projection of the crown periphery to prevent burning roots, and watering should be carried out in time after fertilization. It is advisable to apply 70-80 kg per mu each time, 2-3 times a year.