At present, citrus is in the period of fruit expansion, but many fruit farmers report that this year's citrus is generally slow and small, and it is difficult to understand why it is not clear. Below, follow the small series to find out.
The specific reason why the citrus fruit is slow and the fruit is small is that the reason why the citrus fruit is slow and the fruit is small is necessarily caused by insufficient supply of organic nutrients. But there are many reasons for the problem of organic nutrient supply.
Loss of expanded fruit
Potassium fertilizer is needed in the fruit expansion period. Potassium can promote cell expansion and fruit sugar accumulation, and the fruit is sweetened. However, other elements have an irreplaceable effect on fruit enlargement and quality enhancement.
Hydrogen and oxygen: The demand for oxyhydrogen in citrus is mainly achieved by absorbing water. The fruit is enlarged, also known as the water supply period, which is enough to show that water is the most indispensable thing for fruit expansion. Nitrogen: The inflated fruit generally has a low sweetness, but it begins to appear sweet at the late stage of maturity. When the fruit is expanded, it needs nitrogen supplementation, but it must be in an appropriate amount to avoid causing a long length and affecting fruit enlargement. Phosphorus: promotes cell division. The more cells, the larger the fruit. Calcium: Increases fruit firmness and reduces floating fruit. Magnesium: involved in the formation of chlorophyll, green leaves, strong photosynthesis, and more photosynthetic substances, which is conducive to fruit enlargement. Boron: not only promotes the metabolism of calcium, but also promotes an important element of the transfer of organic matter to the phloem.
Uneven nutrition distribution
Large amount of fruit: If there are too many fruits and the total amount of nutrients supplied is constant, the nutrients absorbed by each fruit will be reduced, resulting in slower fruit growth.
Contradictions between the fruits and fruits: In this period, the fruit enlargement requires a large amount of nutrients. On the other hand, the growth of summer and autumn shoots also requires nutrition. Therefore, the competition between vegetative growth and reproductive growth nutrients is very fierce, and the nutrient supply of fruits is prone to be insufficient, while the fruit expansion is slow. Small.
Tree weakness
Leaf yellowing: the leaves are less yellow and weaker, and the accumulated organic nutrients in the tree are relatively small. It is difficult to supply the fruit to expand and the shoots need to grow, resulting in slow fruiting and small fruit.
Root damage: The previous damage has damaged some citrus roots, and the continuous high-temperature and dry roots have been hit again without recovery, and the absorption capacity of fertilizer and water has fallen sharply.
Abnormal weather: There were more rainy days in the early stage, the lighting was seriously insufficient, the photosynthetic energy efficiency was low, and the accumulation of nutrients was insufficient. Subsequent droughts also affect photosynthesis, and some leaves are persecuted by sunburn, affecting fruit enlargement.
Improvements
1 balanced fertilization
During this period, in addition to focusing on the coordinated application of a large number of elements such as nitrogen, phosphorus and potassium, attention should be paid to the proper supplementation of calcium, magnesium and zinc to ensure the normal supply of expanded fruit and reduce the occurrence of cracking, premature aging and sunburn.
2 curing root system
Abnormal weather conditions have severely damaged citrus roots, and some root problems caused by fertilizers and diseases have been improved in time. Use appropriate fertilizers or medicines to help restore root growth, promote new roots, enhance fertilizer and water absorption capacity, and help to expand fruit.
3 reasonable fruit thinning
For trees with too much fruit, the vegetative branches, shaded branches, diseased branches, etc., as well as pests, deformed fruits, cracked fruits, abnormal fruits, etc., enhance the light transmission of the tree and improve photosynthesis. Ensure that there is enough nutrients to supply the fruit.
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