How to prevent celery hollow?

What causes celery hollowness? How to prevent celery hollowness? Also ask experienced netizens to help introduce the celery hollow mainly by the petiole close to the pith parenchyma, rupture and atrophy, resulting in the pulp cavity enlarged to form a hollow. After the hollow celery cellulose increases, the quality becomes worse, the yield decreases, and the commodity of celery decreases, which will affect the income of vegetable farmers. Therefore, the farming network sorted out the causes and prevention methods of celery hollowness, which are listed in detail below for netizens' reference. 1. The causes of celery hollowness: 1. Celery planting temperature is too low, lack of light or frost damage, resulting in the weakening of leaf photosynthesis and hindering the absorption and transportation of nutrients and water in the root system. Reason 2. Celery cultivated in the open field, such as high temperature and drought, is the main cause of hollow, especially in summer, the temperature difference between day and night is too small, respiratory consumption is more, if the soil water supply is not uniform, the physiological lack of water during celery growth will inhibit the absorption and transport of various elements by the root, not only affect the growth of terminal bud, but also thicken the thick-walled tissue of petiole and aging of position and transport tissue cells. The parenchyma cell tissue is ruptured and hollow. Reason 3. Celery root system has weak fertilizer absorption ability and strong fertilizer tolerance, so it needs more comprehensive fertilizer, nitrogen fertilizer always occupies the main position in the growing period, the lack of phosphate fertilizer in the early growth stage is disadvantageous to leaf differentiation and elongation, and the seedlings are thin and weak, so it is very important to apply phosphate fertilizer at the initial stage. In the middle and later stage of celery, potash fertilizer plays an important role in nutrient transport, petiole sturdiness, fullness and gloss. When there is not enough fertility or lack of water during the peak growth period, the growth is inhibited and the petiole will be hollow. Reason 4. In the case of the same fertilizer and water, the soil has strong salinity and alkalinity, which is heavier than sticky weight or sandy, and celery is prone to hollow in the land with serious diseases and insect pests. Reason 5. If celery is harvested too late, the absorptive capacity of the root system will decrease, malnutrition, cell rupture, loose tissue, aging petiole and hollow. Second, celery to prevent hollow methods: method 1, select pure high-quality solid celery varieties, to the reliable seed department to buy improved varieties. Method 2. Select suitable plots for planting, such as sandy loam soil rich in organic matter, strong water and fertility conservation and good drainage and irrigation conditions, neutral or slightly acidic soil pH, and avoid clay and sandy soil planting. Method 3. Adjust the suitable temperature. Celery is a cold-tolerant vegetable, which requires cool and humid environmental conditions. Celery should be cultivated in the greenhouse with a temperature of 15-23 ℃ in the daytime, no more than 25 ℃ in the daytime, 10 ℃ at night, and no lower than 5 ℃ at night. The temperature in overcast, rain, snow and wind days should be lower, but it should not be too low to prevent freezing injury and early bolting. Proper ventilation according to humidity can reduce air humidity, reduce diseases, assimilate use, reduce respiratory consumption, and enrich and enlarge petioles. Method 4. Strengthen the management of water and fertilizer, apply enough base fertilizer of celery, spread evenly, apply high-quality rotten organic fertilizer per mu, if there are conditions, you can apply fermented chicken manure, or about 15 kg diammonium phosphate, and apply seedling fertilizer after planting slow seedlings. The topdressing of celery during the growing period is mainly based on quick-acting nitrogen fertilizer combined with potash fertilizer, about 20 kilograms per mu each time, and topdressing every 15 days or so. If boron deficiency is found, 0.3% Mel 0.5% solution can be used for foliar spraying. In the vigorous growth period, we should always keep the border soil moist, do not soak water, keep the soil temperature at 60% Mel 80%, and pay attention to drainage and waterlogging prevention in summer cultivation. Methods 5. Timely control of celery diseases and insect pests, maintain strong photosynthetic capacity of leaves, adequate supply of nutrients needed by parenchyma cells in petiole, so as to make the plant grow strong. In addition, and the harvest is also an important measure to prevent the hollow phenomenon. Matters needing attention in raising celery seedlings methods of growing celery in summer