Control methods of empty stem of broccoli

The reason for the empty stem of broccoli

1. If the plant row spacing is too large, the plant growth rate will be accelerated and the incidence of empty stem will be high.

two。 The excessive application of nitrogen fertilizer during the corm expansion period made the plant grow too fast and the incidence of empty stem was high.

3. The occurrence of empty stem was caused by lack of water or improper watering in vegetative growth period and flower head growth period.

4. The high temperature (more than 25 ℃) in the flower head growth period makes the flower head grow too fast and easily lead to empty stem.

5. The results showed that under the condition of boron deficiency, broccoli could induce the change of tissue cell wall structure in the stem, degenerate the tissue in the stem, and lead to the formation of empty stem with the process of Lignification.

6. Some varieties are easy to empty stem, but the empty stem is heritable, and the empty stem is partially dominant to the non-empty stem.

Control methods of empty stem of broccoli

1. Choose varieties that are not easy to empty stems.

two。 In order to avoid high temperature during the flower head growing period, it is required to sow seeds, cultivate strong seedlings and plant them in time according to the growth period of the selected varieties.

3. Reasonable close planting. Prevent the plant from growing too fast.

4. Apply appropriate amount of fertilizer scientifically, and avoid applying too much nitrogen fertilizer during the flower head growing period. For boron deficient soil, 0.75kg boron fertilizer was applied as base fertilizer per 1000m2, and then 0.75kg was used as topdressing or root irrigation.

5. Water at the right time. Always keep the soil dry and wet.

6. Harvest in time. The early bulb is not fully grown, and it is easy to form an empty stem in the evening, and the corm is easy to disperse and wither buds.