Cabbage, which is what we call the cabbage, many people like to eat, and many farmers have planted cabbage. However, recently, farmers have shown that the phenomenon of cracking of the cabbage leaf, that is, splitting ball and popping flower, is easy to occur in the late growth stage of the leaf ball. So what is the cause? How to prevent it?
1. Symptoms of cabbage splitting
Common leaves are cracked at the top and sometimes the sides are also cracked. Most of them are line-like cracks, and there are also vertical and horizontal cross-shaped cracks, revealing the inside of the leaves and other tissues. The degree of cracking will be cracked from several layers of leaves outside the leaf ball, and the depth of the crack is shortened and the stems are not equal. The splitting ball not only reduces the commerciality of the leaf ball, but also causes the leaf ball to be infected and rot.
2, the reason for the cabbage splitting ball
(1) Variety problem: The shape of the planting leaf ball is a flat-head type or a round-head type, which is easy to split.
(2) Unbalanced water in the soil: The leaf tissue of cabbage is brittle. If there is too much water in the soil, the excessive absorption of water by the plant tissue can easily cause the ball to burst. Or encounter heavy rain after the ball, causing flooding caused by flooding in the field, or lack of water in the early stage of the ball, sudden heavy rain or flooding, it is easy to cause increased number of splitting balls.
(3) Harvest is too late: delay harvesting into a leaf ball, etc., easy to split the ball.
(4) Winter warmth: In the southern open field, the over-winter cabbage is too warm and winter, and it is prone to splitting.
3, preventive measures for cabbage splitting
(1) Choosing the right variety: Planting a pointed type that is less prone to splitting.
(2) Select suitable plots: choose flat, easy to irrigate, soil fertile soil to grow cabbage, or use sorghum cultivation to facilitate timely drainage after rain.
(3) Balanced watering: According to the weather forecast and soil moisture and growth stage, watering should be balanced in a timely and appropriate amount, taking the soil moisture as the standard and avoiding flooding. After the leaf ball grows tight, watering should be stopped.
(4) Cutting the outer leaves: The outer leaves can also be cut at the end of the ball to slow the growth of the inner leaves.
(5) Avoid premature ball-forming: In the south, for the cabbage that is harvested in the open winter to the spring of the next year, the water and fertilizer should be properly controlled in the early stage to avoid premature ball formation.
(6) Appropriate root-cutting: According to the condition of the ball and the weather conditions of the plant, it is estimated that when the splitting ball occurs, some forest lines can be cut off 15-10 cm away from the plant side to inhibit the water absorption of the plant (root-breaking method).
(7) Timely harvesting: According to the characteristics of the variety and the growth of the plant, the harvest is timely, and the ball is not caused by the over-maturation of the leaf ball.
4, remedies for cabbage splitting
(1) When the "sprain" treatment finds that the leaf ball has a slight rupture, it should be treated with "sprain" in time to reduce the absorption of nutrients and water by the root system and reduce the degree of rupture. The specific operation is as follows: Grasp the leaf ball with slight rupture with both hands, and shake it to the left or right for 1~2 times (loose), and break the roots, but the main root is not broken, so that the plant is in "false planting". status.
(2) Early harvesting of the leaf ball against the cracked leaf ball should be harvested in time, treated as appropriate, and should not be left in the field for disease and decay.
The above are the symptoms, causes and preventive measures of the cabbage splitting ball. When planting cabbage, farmers must arrange the sowing period according to the local climatic conditions. The ball-forming period should meet the demand for water when the plants are in the ball.
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