Causes and Prevention of Unusual Curry Caused by Cauliflower
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November 08 21:02:05, 2018
1, early flowers. Refers to the occurrence of early kinks and globules in cauliflower plants. (1) Cause: Improper selection of species: low temperature or drought during seedling stage; low temperature after planting; slow seedling emergence: leggy seedlings or young seedlings; insufficient soil fertility during flowerball growth, weak nutrient growth, etc. The flower bulbs are not very developed. If the flower bulbs are hot and dry during the growth period, the flower buds will dry up easily or be scattered, and even the branches will blossom. (2) Preventive measures: Select suitable and suitable varieties for appropriate sowing; temperature at seedling stage is 8-23°C, temperature at rosette stage is 15-18°C, and 15°C20°C is appropriate for flower bud development period. For spring sowing and summer harvesting, seedlings should be kept at a temperature below 10°C for a long time, and should not be planted too early in the spring. Generally, they can be planted only when the average daily temperature is stable above 6°C (5°C at a surface area of ​​10 cm). 6 to 7 true leaves of a heart strong seedlings. If planting early, it is necessary to cover the mulch on the ground early and raise the temperature. And covered simple shed insulation. In the autumn, we must strengthen management of water and fertilizer in the seedbed to prevent drought. Planting age should not be too large, generally 5 to 6 true leaves 1 heart, 25 to 28 days strong seedlings is appropriate, avoid using weak seedlings mouth teeth old seedlings. At the same time, the top dressing should be early, so as to promote the formation of a sufficient number of leaves when the flower buds are differentiated, and a well-developed stem with a thick root system. 2, yellow ball, Jiao Lei. When the flower ball grows to the size of the fist, the buds become yellow; the depression in the center of the flower ball becomes dry brown. (1) Cause: During the expansion of flower bulbs, the temperature is high and it is rainy; the plants are long and the stems are elongated; or the outer leaves are too luxuriant to make the flower balls fade in color and yellow and the quality is reduced. On the contrary, in case of strong light. There Jiaolei. If there is a lack of boron during growth, it often causes the surface of the flower bulb to turn brown and taste bitter. (2) Preventive measures: Apply adequate amounts of fertilizer during cultivation to prevent excess fertility. During the bud stage, the buds of the buds are each applied with 1 compound fertilizer. Partial application of nitrogen fertilizer is prohibited. According to the growth and development status of the plants, appropriate amount of trace element fertilizer should be supplemented. Increase the spacing of the plants and inhibit the vegetative growth of the bulb during the expansion period. In the hot season, if there is no rain for a long time, the light is too strong and the removable blades cover the flower ball, which can not only reduce the temperature. The occurrence of Jiao Lei can also prevent yellowing of flower balls. 3, scattered flower ball. Refers to the development of some flower buds on the same flower bulbs, the flower bulbs diverge, forming a flower bulb shaped like a pagoda. (1) The reasons are as follows: first, the flower buds are excessively prosperous after differentiation; the reproductive growth is inhibited; the second is the flower bud differentiation period encountering high temperature, so that the flower buds are not completely differentiated; the third is the late stage of the seedling breeding or the low temperature after the colonization, which causes the flower buds to be stunted and cause dispersal Flower bulbs; Fourth, the main root is damaged, and the roots are stunted, which affects the growth and development of the plants and causes them to scatter. (2) Preventive measures: Cultivation of age-appropriate seedlings. After planting, the amount of watering in spring should be appropriate, diligently cultivating and raising the ground temperature: in the autumn, the seedling water should be poured in a timely manner, the ground temperature should be lowered, the cultivating soil should be ploughed, and the seedlings should be slowed down. Maintain a certain humidity in the field: make the root system fully expanded to prevent root rot. At the same time, it is necessary to maintain a uniform fertility, and avoid excessive topdressing. 4, wool flowers. Refers to the appearance of hairballs on the surface of the flower bulb in cauliflower cultivation. (1) Cause: The hair on the broccoli is caused by elongation of the pedicel, organ differentiation, and sepal formation, which is generally yellow-green or purple. (2) Preventive measures: appropriate sowing, cauliflower early maturing species can be sown from April to June, and mid-late maturing species from June to early August are the best sowing dates. Implantation age should not be too large, generally 5 to 6 true leaves 1 heart, 25 to 28 days strong seedlings is appropriate, avoid weak seedlings and young seedlings. At the same time diligently cultivating loose soil to promote the slow seedlings. Early fertilizer, to promote the main, in the bud stage and the bulb expansion. , Compound fertilizer, to avoid partial nitrogen fertilizer. When drought is lacking, watering should be done in a timely manner to keep the soil moist. Long-term high-temperature light but also picking leaves cover flower ball. 5, purple flowers. Unbalanced red and purple appear on the surface of cauliflower flowers. (1) Reasons: It is caused by the sudden appearance of hypothermia after the formation of flower bulbs. It is caused by the conversion of glycocalyx to anthocyanin in the flower bulb tissue. (2) Preventive measures: Select appropriate and suitable varieties and sow them at an appropriate period so that the temperature during each growth period is appropriate. During planting, sufficient base fertilizer was applied to strengthen field management. According to the fertility characteristics of the plants in different periods, different proportions of nitrogen, phosphorus and potassium fertilizers were applied in combination with watering. In the case of low temperature in the flower bulb growth period, one is to consider the cover ball antifreeze, and the other is to plant the small flower bulb plant.