In the production of spring broccoli, some flower bulbs did not grow much, and flowering branches were elongated and scattered early, resulting in loose flower bulbs; while some flower bulbs showed purple green fluffy flowers on the top, and flower buds were visible after a period of time. The whole flower ball is chicken-like. These two kinds of phenomena are called "scatter balls", which leads to a serious reduction in product quality, almost losing the value of food, and reducing production and income.
First, the reasons for the ball
1. Inappropriate variety. Some varieties are weak in winter and are easily vernalized.
2. The growth of seedlings is inhibited. Cauliflower flower bulb formation must have sufficient leaf area, if the seedling stage is affected by drought or a long period of low temperature, growth is inhibited, the formation of aging seedlings, prone to scattered after colonization.
3. Implantation period is unreasonable. Cauliflower leaf growth temperature is 8 °C -24 °C, colonization is too early by the influence of low temperature and frost to extend the period of mild seedlings, or even frozen, the leaves do not grow up, the ball is very small, resulting in scattered balls. The optimum temperature for bulbous growth is 15°C-18°C. The colonization is too late, and the temperature during the growth phase of the bulbs is high. The flowering branches will rapidly elongate and scatter.
4. Insufficient fertilizer and water. The broccoli is hi and hi wet, such as insufficient fertilizer and water, and the leaves grow thin, resulting in small balls and scattered balls. After flowering, if the soil is dry, it will also scatter the ball.
Second, prevention and control methods
1. Use spring-grown spring varieties. The varieties imported from other places should be used for production after trial planting.
2. Cultivate strong seedlings. The use of nutritious oysters or plastic bags nursery, nutrition oysters or plastic bags should not be less than 8 cm in diameter. Seedling temperature during the day to maintain 13 °C -15 °C, night 10 °C -12 °C, to prevent drought, bred 7-8 leaves, larger and thicker leaves, short stem thick section, root system developed, plant height 15-18 cm Strong seedlings.
3. Strengthen fertilizer and water management. Before the planting, 2000-3000 kilograms of high-quality farmyard fertilizer was applied per acre, and 10 kilograms of ammonium sulfate was applied per acre when planting. Pour enough water to set the roots, and then slowly plow the seedlings and pour the seedlings once. Afterwards, plow the seedlings. When the diameter of the flower ball is 2-3 cm, end the seedlings. After 10 days, pour the water again to keep the soil moist. After flowering, the two fertilizers are chased with irrigation, and 15 kg of ammonium sulfate or 1000 kg of human waste is recovered per mu.
4. Harvest timely. When the flower bulb is fully grown, the surface is round and the edges have not yet spread out, it shall be timely harvested.
Shanghai J.Shine Co.,Ltd , https://www.jshinechem.com