What causes fruit cracking in Gonggan mandarins? Causes and control methods
Gonggan mandarin seedlings, also known as Emperor mandarin, are a fruit that people relatively like in daily life, and they are planted in many regions of our country. However, during the cultivation of Gonggan mandarins, fruit cracking occurs, which seriously affects the yield and quality of Gonggan mandarins and reduces returns. So what causes fruit cracking in Gonggan mandarins? How should it be controlled? Let's take a look at the detailed introduction together.
I. Causes of fruit cracking
Fruit cracking in Gonggan mandarins generally occurs mainly in relation to moisture. During the growth of Gonggan mandarins, if water is insufficient, it will lead to fewer fruits and cause fruit drop. If water suddenly increases, fruit cracking is very likely to occur. Fruit cracking in Gonggan mandarins generally occurs from the fruit expansion stage to the color change stage, and cracking appears when a long drought is followed by rain. In addition, fruit cracking in Gonggan mandarins is also somewhat related to calcium deficiency. When the plant lacks calcium, calcium deficiency in the peel causes reduced toughness. When the flesh absorbs water and expands, the peel growth cannot keep up with the flesh growth, and the flesh directly bursts it open.
II. Control methods
1. Apply more organic fertilizer
During the autumn shoot stage, more organic fertilizer should be applied, combined with quick-acting compound fertilizer, and applied according to the balanced formula fertilization method, which helps coordinate the supply of nutrients such as organic fertilizer and inorganic fertilizer, promotes balanced growth of flesh and peel, makes the cell density of the peel high, enhances toughness, and reduces fruit cracking.
2. Foliar spraying of fertilizer
During the fruit expansion stage, foliar fertilizers such as calcium and magnesium should be sprayed in a timely manner, which can effectively supplement trace elements such as calcium and magnesium lacking in the plant. When carrying out foliar spraying, pay attention to the concentration.
3. Do a good job in water management
In summer, when temperatures are high and there is much rain, stagnant water in the orchard should be drained in a timely manner to prevent drought, so as to avoid water accumulation in the orchard leading to reduced soil oxygen content, causing suffocation and root rot, which leads to weakened tree vigor and yellowing of the plant. In autumn, when the climate is dry, water should be applied appropriately to keep the soil moist, but it is also necessary to avoid a long drought followed by sudden rain, which causes the flesh to absorb a large amount of water and results in fruit cracking.
The above is an introduction to the causes of fruit cracking in Gonggan mandarins and the control methods. We hope it can help you. If you want to learn more related knowledge, please follow us.