Broccoli is a healthy green vegetable with very rich nutrition. It is also loved by consumers and has considerable planting benefits. However, farmers have recently responded that broccoli has a hollow phenomenon, which means that the main stem of the broccoli flower ball has a hollow but does not rot, which is caused by physiological disorders, which seriously affects the value of broccoli and causes damage to farmers. A big loss. So why is broccoli hollow? How to prevent it? First, the reason for broccoli hollow Empty stems are physiological disorders caused by various factors such as planting density, excessive nitrogen fertilizer, water shortage, boron deficiency, and high temperature. 1. Planting density plant spacing increases, plant growth rate increases, and the incidence of empty stems is high. 2, excessive nitrogen fertilizer, especially in the growth period of broccoli flower ball, the plant grows too fast, the incidence of empty stems will also increase. 3, broccoli is a multi-sap crop, requires a certain amount of water, in the vegetative growth period and flower growth period if water shortage or improper watering, it is easy to cause empty stems. 4, temperature broccoli is a cool crop, suitable growth temperature is 15-22 ° C, such as improper planting season, in the flower growth period encounter high temperature (above 25 ° C), so that the flower ball grows too fast, easy to cause Empty stems. 5. Boron has been tested to prove that the empty stem of broccoli is related to boron deficiency. Under the condition of boron deficiency, the cell wall structure of the stem can be induced to change, which causes the tissue in the stem to degenerate, accompanied by lignification process, causing the formation of empty stems. . 6. Different varieties of broccoli have different susceptibility to empty stems. Some varieties have wide adaptability, are not easy to empty stems, some varieties are easy to empty stems, and empty stems can be inherited. Second, the control measures of broccoli hollow 1. Choose varieties that are not easy to empty stems, arrange suitable planting time, and reasonably close planting. Generally, the suitable plant spacing is about 30~45 cm, and the row spacing is about 60~70 cm. 2, fertilizer management: planting broccoli should choose a well-filled plot, the management always keeps the soil wet and dry, in the dry area and the northern spring planting period, it is generally required to pour water every 5~7. In the case of applying the compost compost as the base fertilizer, the water can be applied with a nitrogen fertilizer of 13 kg per 1000 square meters. The principle of small amount of multiple times should be applied in the growing season of the flower ball, or no nitrogen fertilizer should be applied to increase the phosphorus and potassium fertilizer. The amount of application. For the boron-deficient soil, apply 0.75 kg of boron fertilizer per 1000 m2 to make the base fertilizer, and then use 0.75 kg for top dressing or root filling. 3, timely harvest: too late to become empty stems, and the flower ball is easy to loose, withered, so pay attention to timely harvest. Generally, it takes 10 to 15 days from the current flower ball to the harvest. The standard for harvesting is 12 to 15 cm in diameter. The flower ball is tight and the flower buds are free from yellowing or necrosis. The above is the reason and prevention measures of broccoli hollow, because the planting efficiency of broccoli is considerable, more and more farmers have planted broccoli, but in the process of planting, farmers must pay attention to the problem of hollow broccoli, It must be dealt with in a timely manner. For the wonderful pictures and popular comments about broccoli hollow, you may be interested in the following recommended content, welcome to read. YT-M95 YT-M95 Shenzhen Sunshine Technology Co.,Ltd , https://www.shenzhenyatwin.com
