When is the best time to supplement calcium in citrus fruit trees? How to take calcium supplements?

The reason for fruit rot is the increase of precipitation, excessive digestion and absorption of basal fertilizer, and the rapid disintegration rate of fruit cellsThe digestion and absorption of fruit cells surpasses the growth rate of ectocarp cells, and at this time, if the calcium content of exocarp cells is too low, the ductility is poor, and the tension borne exceeds the load, it is very easy to be dehisced by fruit cells. Calcium and zinc supplementation of fruits in advance will ensure that the extracellular fluid of the cells is stable, and the exocarp cells are sufficiently thick, malleable, and not easy to be cracked.

In the past, citrus plantations generally did not apply trace element fertilizer, and more than spraying leaf fertilizer can treat the deficiency of this fruit tree. Nowadays, because the orchard is planted for a long time, the organic fertilizer application is not enough, resulting in the relative lack of nutrients in the soil layer, only by the method of leaf spraying, it can not meet the nutrient requirements of the fruit tree for calcium fertilizer and its trace elements, when applying calcium fertilizer to citrus fruit trees, phosphorus and potassium fertilizer and calcium fertilizer can not be applied at the same time, so that there will be certain chemical changes, and the two fertility will be affected. Therefore, at the same time as phosphorus and potassium fertilizer, calcium fertilizer can not be applied, and it is generally applied at a distance of about 20 days.

Due to the lack of calcium is harmful to roots, leaves, and fruits, it is best to supplement calcium for citrus, and we recommend that in the case of applying bottom fertilizer in spring, apply calcium fertilizer according to the root of the road, and cooperate with other organic fertilizers and compound fertilizers to ensure long-term calcium fertilizer fertility. At this time, the rhizome is the most active, and the new root grows and develops the fastest, so it is better to fill with calcium fertilizer.

The rhizome is an important part of citrus to absorb calcium, and citrus transports calcium to each human organ of citrus according to plant respirationIn addition, it is difficult to move calcium in the body of green plants, so it is often difficult for citrus sprouts and fruits to obtain sufficient calcium, and must be filled according to the method of leaf spraying.

The best period of calcium supplementation for citrus fruits can generally be divided into two periods, the first is the flowering to young fruit stage, and the second is the middle stage of fruit expansion. Calcium supplementation can be combined with the actual situation in the citrus orchard, using ground spreading and foliar spraying.

The best time is when the young fruits are enlarged. At this time, we must pay attention to the use of fertilizers, and we must choose fertilizers with high calcium content.

Generally, fertilization should be carried out in June, so that calcium can be better supplemented. In the process of calcium supplementation, we must pay attention to the way of calcium supplementation, but also pay attention to the fertilizer of time, and also pay attention to the maintenance of fruit trees.

The data show that the first time is about 20 30 days after the flowering, during which about 30% of the calcium can be accumulated, and the second time is during the fruit period, during which about 50% of the total calcium can be absorbed; The third time is about 20 to 30 days before fruit picking.

For the first time, about 20 to 30 days after flowering, calcium and boron are recommended to be supplemented at the same time; The second time is in the fruit expansion stage, which can absorb about 50% of the total calcium in this period; The third time, about 20 to 30 days before fruit picking, the calcium absorbed during this period can be used to meet the calcium needs of the fruit trees for the growth of the fruit trees next spring.

The first ** period: 20-30 days after flowering. The second ** stage: when the fruit is expanded. The third ** period: 20-30 days before picking.

You can choose amino acid calcium, or you can try to use plant ash, which also contains calcium, which is very good for the soil.

When the fruit tree is deficient in calcium, you can generally choose some calcium fertilizer, and there are various types of calcium fertilizer in the market, to choose the calcium fertilizer suitable for fruit trees as calcium, the fertilizer is absorbed by the plant roots, so as to be able to exert the greatest effect, the general calcium fertilizer has calcium, magnesium and phosphorus fertilizer and nitrogen fertilizer, can supplement calcium, and the silver bottom fertilizer also needs to pay attention, generally to choose the calcium fertilizer that has been diluted in high spring, so that it can release calcium substances in a long period of time, so that the roots can absorb some calcium substances in the soil, so that the growth of fruit trees is better. When topdressing, Feng Nianyou should also pay attention to the addition of nutrients, so that the fruit tree can absorb calcium.

If the fruit tree lacks fertilizer and socks, the individual can import sheep manure, because the nutrients of sheep manure are far more useful than many fertilizers and agricultural machinery.

The purpose of calcium supplementation in citrus is mainly to prevent leaf mosaic leaves, reduce the cracking of fruits in the swelling stage, floating peel fruits, sun fruits, etc., and can increase the skin hardness of fruits, especially some wide-skinned citrus, such as Harumi, Ehime, etc.

1. Calcium supplementation time for citrus fruit trees.

1. Citrus fruit trees bloom during flowering period.

In addition to supplementing nitrogen fertilizer in time after flowering, it is important to add calcium and magnesium fertilizer to supplement the use of citrus. First, it can replenish the nutrients consumed by fruit trees after flowering as soon as possible and restore the tree's potential; Second, after the application of calcium fertilizer, it is conducive to the absorption of boron fertilizer by fruit trees, and plays a role in stabilizing fruit setting.

2. Citrus fruit expansion period.

Generally, it is also supplemented with fertile leaf calcium fertilizer around July every year to promote autumn shoots and promote calcium at the same time, which can reduce the sunfruit, and the fruit expansion period can also reduce the fruit cracking and increase the fruit hardness in the later stage.

Citrus calcium deficiency is common is the problem that old leaves are not lacking, new leaves are missing, leaves are not lacking, and fruits are missing, because the mobility of calcium is relatively poor, and it needs to rely on the transpiration of plants to drive the mobile absorption and transformation.

This is the main reason for the lack of calcium in the fruit, sometimes although we spray good calcium fertilizer in the ground and on the foliar surface, if there are continuous rainy days or root soil problems, the calcium can not move quickly into the fruit, resulting in calcium deficiency, so if you want to make up for calcium fertilizer, you need to solve the problem of calcium movement and absorption and movement by transpiration.

After many years of market application experiments, it is found that boron-calcium foliar fertilizer containing organic acid can solve such problems, and also realizes the effect of calcium and boron supplement, because the boron calcium in the organic acid boron-calcium foliar fertilizer is organically complexed together, so it can carry calcium to move freely and quickly into the fruit, not calcium boron mixed or chelated together, it must be through the organic acid complexation, and this also solves the problem of absorption and movement by transpiration, and plays a role in a variety of weather environments. Calcium supplementation has a very good effect.

Calcium supplementation for orange trees should first be applied to the orange trees with sufficient basal fertilizer. Especially in autumn and winter, 30-50 kg of farm fertilizer should be applied to each fruit tree as base fertilizer, and it is best to apply about 2 kg of superphosphate and farm fertilizer at the same time.

The use of boron-calcium foliar fertilizer that can move freely with calcium and boron not only solves the problem of calcium movement, but also solves the characteristics of plants absorbing elements by transpiration, and the foliar surface is easy to be absorbed and utilized. Of course, the best way to supplement calcium in the fruit is to directly supplement it through leaf spraying, of course, the premise is to ensure that there is sufficient calcium in the tree to prevent the tree and branches and leaves from robbing the calcium in the fruit after the lack of calcium, and the phenomenon of "calcium reflux" occurs. The application of water-soluble calcium fertilizer can promote the growth of root tips, promote the hair of roots, and delay the senescence of roots. At the same time, the soil is loosened and improved, and the aggregate structure is increased.