What causes the quality deterioration of summer cauliflower?

What causes the deterioration of summer cauliflower quality? Please introduce the quality of cauliflower in summer production, often due to the influence of environmental conditions and improper cultivation measures. In many years of planting cauliflower, we have accumulated some experience in preventing the deterioration of common cauliflower quality, which is now introduced to you for reference. Split flower and black heart crack flower, that is, the inside of the flower ball is cracked, the flower branch is hollow, the surface of the flower ball often appears scattered water-immersed brown spots, the taste is bitter, the leaflet around the flower ball is not sound, the leaf margin is curled, and the petiole has small cracks, which is mainly caused by the lack of boron in the soil. Lack of potassium in the soil is easy to cause cauliflower black heart. Control methods: before cauliflower planting, the soil was fertilized with N, P and K formula, and organic-inorganic compound fertilizer was widely used as base fertilizer. At the same time, 0.5 kg of borax or boric acid was applied per mu of base fertilizer. When the plant or rosette shows symptoms of boron deficiency or potassium deficiency during the growth period, 0.2%-0.3% borax solution or 0.2% potassium dihydrogen phosphate solution is sprayed on the leaf surface, once every 5-7 days and 3 times in a row. The bolts and branches of loose flower heads develop rapidly, resulting in loose flower heads. The reason for the formation: during the heading period, the temperature was too high, the bulb expansion was inhibited, and the flower bolts and branches grew rapidly, which led to scattered flowers after elongation; the bulb was not harvested in time after full growth. Control methods: sowing at the right time, arranging the flower head growth period in the month with an average daily temperature of 15 ℃ ~ 23 ℃ (that is, spring and autumn cultivation is better), in order to avoid the influence of high temperature during the heading period, and harvest when the flower ball is fully grown and the edge is not yet scattered. The sunshade net can be covered conditionally to reduce the effect of high temperature during pilling. In the production of cauliflower, the corm often turns yellow, which is mainly caused by the strong light. Prevention and treatment: when the bulb grows to 3 cm in diameter, the outer leaves near the bulb can be gently bent to cover the bulb, and the sunshade net can be covered conditionally. The upper leaves in the center of the plant can also be tied up with straw to wrap the leaf ball to avoid direct light. Click to get more cauliflower planting techniques click to get more vegetable planting techniques