How to prevent and cure the hollow stem of broccoli? Fertilizing techniques and methods of edible fungi

1. Select varieties that are not easy to empty stem, which is one of the most effective ways to prevent empty stem.

2. When arranging the sowing of broccoli, in order to avoid high temperature during the bulb growing period, we should sow seeds at the right time according to the growth period of the selected varieties, cultivate strong seedlings and plant them in time. Reasonable close planting according to the characteristics of the varieties used. Generally, the suitable plant spacing is 30cm to 45cm and the row spacing is 60cm to 70cm.

3. Select the land with good drainage and irrigation, and determine the type and amount of fertilizer according to the soil nutritional status. Always keep the soil dry and wet.

4. During the heading period, little or no nitrogen fertilizer should be applied, phosphorus and potassium fertilizer should be increased, and symptoms of boron and molybdenum deficiency should be found. molybdenum fertilizer and boron fertilizer should be sprayed on leaves in time, 0.75 kg boron fertilizer can be used as base fertilizer per mu, and 0.75 kg boron fertilizer should be used as extra-root topdressing fertilizer.

5. If it is harvested too early, the bouquet is not fully grown, and the yield is low; if it is harvested too late, it is easy to empty the stem, and the bouquet is easy to loose and wither and lose its commercial value. Generally, it takes 10 to 15 days from the flower head to harvest, and the harvest standard is that the horizontal diameter of the flower ball is 12 to 15 centimeters, the flower ball is compact, and the buds are not yellowed or necrotic.