The empty stem of broccoli makes the main stem of the flower bulb have a hollow surface, which is lignified and brownish, but does not rot. This phenomenon seriously affects the quality and commodity value of the commodity flower ball, and the loss is huge.
How to prevent broccoli empty stems? Linyi Fertilizer Network Copyright
Reasons for the occurrence of broccoli empty stems: 1. The plant spacing is too large, the plant growth rate is accelerated, and the incidence of empty stems is high. 2. Excessive application of nitrogen fertilizer during the expansion of flower bulbs makes the plants grow too fast and the incidence of empty stems is high. 3. The occurrence of empty stems caused by lack of water or improper watering during the vegetative growth period and flower growth period. 4. In the flower growing period, the high temperature (above 25 °C) makes the flower ball grow too fast and easily cause empty stems. 5. Experiments have shown that under the condition of boron deficiency, broccoli can induce the change of cell wall structure in the stem, degenerate the tissue inside the stem, and accompany the lignification process, causing the formation of empty stems. 6. Some varieties are easy to empty stems, while empty stems are heritable, and empty stems are partially dominant to non-empty stems. Linyi Fertilizer Network Copyright
Broccoli empty stem control measures: 1. Select varieties that are not easy to empty stems. 2. To avoid the high temperature of the flower ball in the long-term growth period, according to the growth period of the selected variety, it is required to sow at the right time to cultivate strong seedlings and plant at the right time. 3. Reasonable close planting. Prevent plants from growing too fast. 4. Scientifically apply proper amount of fertilizer, avoid excessive application of nitrogen fertilizer in the flower growth period. For the boron-deficient soil, 0.75kg of boron fertilizer is applied as a base fertilizer per 1000m2, and 0.75kg is used as a top dressing or root filling. 5. Watering at the right time. Always keep the soil dry and wet. 6. Harvest at the right time. The premature flower ball is not fully grown, and it is easy to form an empty stem in the late, and the flower ball is easy to disperse and dry bud. Linyi Fertilizer Network Copyright
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