How to manage large jujube during the fruit expansion period? These key points must be mastered
Large jujube, also known as sweet jujube, has nutritious, crisp and sweet fruit, contains a large amount of vitamins and trace elements, and is an excellent tropical fruit developed through improved breeding. Management during its fruit expansion period is extremely important and directly affects yield and quality, so how should large jujube be managed during the fruit expansion period? Let's take a look together.
1. Water management
During the fruit development period of large jujube, the plant needs a large amount of water. At this time, alternating drought and moisture can easily cause serious fruit drop, but before harvest, flooding irrigation should be avoided, otherwise the fruit will absorb a large amount of water, causing sugar content to decrease or fruit cracking, greatly affecting quality. From fruit set to the expansion period, the soil should be kept moist. When young fruit begins to expand, the plant's water demand increases sharply. At this time, a sufficient water supply must be maintained, otherwise deformed fruit or stiff fruit can easily form. In the late expansion period, water should be properly controlled to promote sugar accumulation, increase fruit sweetness, and improve quality.
2. Fertilizer management
After the first batch of flowers sets fruit and begins to mature, the main purpose is to promote fruit expansion in the middle and late stages. At this time, the plant's water and fertilizer demands are extremely high, especially for nitrogen, calcium, and magnesium. Therefore, when fertilizing, attention should also be paid to maintaining medium and trace nutrients such as magnesium, calcium, and boron. This promotes fruit growth and expansion, and can also improve the plant's disease resistance and reduce the chance of infection by pests and diseases. The large jujube plant has a well-developed root system, with most roots distributed in the shallow soil layer and strong fertilizer absorption capacity. The amount of fertilizer required in each period is large, but the fertilizer types differ, so fertilizer management for large jujube must not be careless and should supply fertilizer according to the needs of the plant at each stage.
3. Foliar fertilizer
In the middle and late stages of plant growth, root absorption weakens and cannot meet the needs of fruit growth and development and new shoot emergence, so foliar fertilizer needs to be sprayed in time. During the fruit-strengthening period, 1 bag of Jiamei Hongli can be applied per mu by flushing, while 1000-fold Jiamei Nao Baijin solution can be sprayed on the leaves 2-3 times. In addition, in winter, cold protection and frost resistance should be done well. 1 bag of Jiamei Hongli can be applied per mu by flushing to increase ground temperature by 3-5°C, and 1000-fold Jiamei Jindian solution can be sprayed on the leaves 1-2 times to prevent freezing and damage.
4. Pest and disease control
Green jujube has strong disease resistance, so the chance of pests and diseases is relatively low, but once pests and diseases occur, the consequences are serious, so pest and disease control in the later stage of green jujube should be strengthened. Diseases are mainly powdery mildew, while pests are mainly red spider mites. Pest and disease control focuses on prevention. First, strengthen orchard management, prune rationally, avoid forming excessive vegetative branches, low branches, and overlapping or crossing branches, and improve orchard ventilation and light penetration. Pay attention to orchard cleaning. After cleaning, take diseased branches, leaves, and diseased and residual fruits out of the orchard, then spray fungicides and insecticides comprehensively. In the early stage of pest and disease occurrence, ethirimol, pyraclostrobin-tebuconazole, Lufei, etc. can be sprayed alternately for control.
The above is an introduction to the key management points for large jujube during the fruit expansion period. I hope it can help you. If you want to learn more related knowledge, please follow us.