Sweet orange, is a kind of orange. In our country, the sweet orange is grown for a shorter period of time than many other common fruits. The most famous sweet orange in China is Ganan navel orange. It is mainly because Ganan is suitable for growing sweet orange, and Ganan sweet orange has the characteristics of large fruit, sweet, beautiful, juicy and excellent quality. So today we are going to learn a very important point in the planting process of sweet orange. Let’s take a look at its fertilization technology.
A、 Soil management of sweet orange
We need to do a good job of deep turning and expanding the holes and maturing the soil. Prohibit the planting of corn, wheat and other tall plants in the garden. Do a good job of reasonable intercropping and weeding of the orchard.
B、 Fertilization management of sweet orange
1、Fertilization principles for sweet orange
Should fully meet the needs of sweet orange for various nutrients. And advocate more organic fertilizer, reasonable application of inorganic fertilizer and formula fertilizer. Then according to the leaf analysis results, orchard soil analysis results, blood orange weathering period and other guidance fertilization.
2、Fertilization method of sweet orange
Soil fertilization is the main method, together with foliar fertilization. Adopt the methods of circular furrow application, strip furrow application, hole application and soil spreading fertilizer.
Irrigation when the soil is dry and early, drainage when waterlogged. Pruning.
Pruning according to local conditions, pruning because of the tree, promote the suppression of proper, ventilation and light, three-dimensional results.
②Shaping natural open shape
The stem height is 20-40cm, the main branches 3-4 branches in the main trunk distribution staggered. The branching angle of the main stem is 30°-50°. Leave 2-3 secondary branches on each main branch. Generally, after the formation of the third main branch, about to form the central stem, cut and twist to one side for the fruiting branch group.
4、Pruning of sweet orange branches
Light pruning is the main. After the selection of the class central extension and each main branch, sub-principal branch extension. Then it is moderately or even heavily shortened. And the degree of shortening and cut bud direction to adjust the balance of growth between the main branches. We generally thinned the overdense group of branches appropriately, and also need to retain the inner branches and the weaker branch tips in the lower part of the crown.
②First fruiting period
Continue to select short cut to deal with all levels of backbone extension branches. Wipe out the summer tips and promote the development of healthy autumn tips. In autumn, use ring cutting, root cutting, water control and other flowering measures for vigorous trees.
Retract fruit-bearing branches, flowering fruit-bearing branches and declining branches in time. Cut off light-blocking branches, dead branches and diseased branches.
C、Fertilization of young sweet orange trees
Sweet orange is generally five years fruiting, so we usually call the first four years of sweet orange trees as young trees. These four years are the period of growth and development of sweet orange trees. What we need to do is to promote the growth of young trees. For annual sweet orange trees, we fertilize about one month after planting. And we need to follow up with fertilizer once a month. The main fertilizer is urea. After the buds are mature, we need to use compound fertilizer. The most popular fertilizer on the market is the one produced by Nagric.
The amount of fertilizer used should be about 50 grams, and it should be applied in a furrow outside the roots. Another point to note is that the number of fertilization is almost eight to nine times a year for young trees in the growing stage. In other words, you can stop fertilizing at the beginning of October. For two to four year old sweet orange trees, the fertilization method is basically the same as that for annuals. However, we can appropriately increase the amount of fertilizer applied and not more than two hundred grams at most.
D、Fertilization of fruiting trees
Spring fertilization of sweet oranges needs to take place as early as possible, usually between February and March each year. This can avoid the nutrients to hurt the root system of sweet orange. The main purpose of spring fertilization is to promote the growth of spring buds, which are very relevant to the fruiting branches. It also has a greater impact on how much fruit is produced afterwards. We mainly fertilize with Nagric’s compound fertilizer. And it has a high nitrogen content, the amount of each fruit tree is almost one pound to two pounds or so.
2、Flower and fruit fertilizer
Orange flower and fruit fertilizer is divided into pre-flower fertilizer, fruit fertilizer and strong fruit fertilizer. Generally in early April to chase the pre-flowering fertilizer. This is to supplement the tree’s nutrition, to ensure the quality of flowering. And it is mainly fast-acting fertilizer. Sweet orange is the fruit stabilization fertilizer. It is usually done at the end of April. Still use compound fertilizer to carry out, the amount of each plant is controlled at about half a pound. And in the pursuit of fertilizer can be combined with fruit retention agent. This can improve the fruiting rate of sweet orange and reduce fruit drop. The last is the fruit fertilizer. This is usually done from the end of June to the beginning of July. The amount of fertilizer applied is about two pounds. And mainly to potassium fertilizer, and with the application of boron fertilizer, zinc fertilizer.
3、Fertilizer after harvesting
When the orange harvest is over, in order to restore the tree, to ensure that the next year’s production. Then we need to carry out scientific post-harvest fertilizer. When available, it is best to use a combination of organic fertilizer and inorganic fertilizer to carry out. This will not only replenish the tree’s nutrition, but also improve the differentiation of flower buds. This will enable the sweet orange trees to overwinter safely and ensure the yield of the coming year.