How to manage navel orange expansion period

Navel orange is a very popular orange variety, which is mainly distributed in the south of China. Navel orange contains a lot of nutrients such as vitamin C and carotene, which can promote blood circulation and prevent gallbladder diseases. Navel orange also has a certain planting area in China, and the planting management of navel orange is very important. Especially in the fruit expansion period, it will directly affect the yield and quality. So how to manage the navel orange during the expansion period? let's take a look at it.

1. Topdressing in time

From June to July, the summer shoots gradually mature, the root growth rate will also accelerate, and begin to enter the growth period. At this time, we should apply fertilizer in time to promote the growth of root capillaries and the expansion of fruit, and then ensure that the fruit accumulates sufficient nutrition for autumn shoot germination. The time of topdressing is generally about 2-3 weeks before autumn shoot germination, which is arranged reasonably according to the tree potential. In general, the old and weak trees can shoot earlier, otherwise they can shoot later. To ensure a balanced and uniform fertilization, the appropriate supplement of trace elements for fruit trees can promote fruit expansion, protect flowers and fruits, and improve the disease resistance of fruit trees.

2. Rational watering

Navel orange needs plenty of water to grow, especially during the expansion period. Moisture is the key factor affecting the expansion of navel orange, which has an important effect on fruit size, sugar content and so on. Therefore, in the navel orange expansion period, it is necessary to ensure that there is sufficient water to promote the growth and development of the fruit. We should water reasonably according to soil moisture. If there is no rainfall for more than a week, we should water it in time. In the high temperature environment, we should first use spray watering to reduce the temperature of the crown, and then watering, not excessive watering, to prevent root rot leading to navel orange fruit cracking.

3. Apply foliar fertilizer

Foliar fertilizer should be properly sprayed during the expansion period, especially after the emergence of new buds, foliar fertilizer should be added in time to promote the growth of leaves. The foliar fertilizer is mainly nitrogen and phosphorus fertilizer. When the new shoot stops growing and the top physiology falls off, the proportion of phosphorus and potassium fertilizer will be increased to promote the expansion of fruit and the ripening of autumn shoot. When spraying foliar fertilizer, brassin can be added properly to promote the nutrient absorption of leaves and improve the conversion rate of foliar fertilizer. Brassin can promote fruit cell division, help fruit expansion, reduce fruit dehiscence, promote chlorophyll synthesis and enhance photosynthetic capacity.

4. Pest control

The expansion period of navel orange is usually around August every year, which is also the stage of high incidence of various diseases and insect pests, so we also need to strengthen the prevention and control of diseases and insect pests. The common diseases and insect pests of navel orange are canker, planthopper, etc., diseases and insect pests are mainly to prevent, it is necessary to observe the growth of navel orange. To achieve early detection and treatment of diseases and insect pests, prevent the spread of the disease, and expand the affected area. Especially in navel orange shoots, the occurrence rate of pests increases, so each autumn shoot should be sprayed at least twice, usually when the growth is 1-2 cm, and then spray again 2-3 weeks later.

When watering, we should also pay attention to temperature and light to prevent long-term drought and soil rainfall leading to fruit cracking, leading to fruit drop and so on. Therefore, it is necessary to strengthen management, properly cover tree plates, cultivate appropriate amount of grass, improve soil moisture retention capacity, reduce temperature and reduce water evaporation. That's all for today's introduction. This article is for reference only. I hope it can help you all.