The dry heart of Chinese cabbage is also called "skin-dried" and there is no abnormal appearance. However, the internal ball is degenerate and cannot be eaten, causing a great loss in production. August 3-9 is a time when a large number of autumn cabbages are planted. To prevent the occurrence of dried cabbage heartburn, prevention should be conducted from the seedling stage. First, the cause of the disease Due to root dysfunction or other reasons, calcium can not be transported to the growing tip, causing physiological barriers; a serious lack of active manganese in the soil can also cause; Saline, pouring industrial wastewater, application of ammonium sulfate, ammonium carbonate Excessive or uneven application may cause burning of roots, seedlings may take too long, and soil moisture may easily cause dry heartburn. Second, the symptoms Cabbage more than the beginning of the rosette period and the heart of the disease, the victim leaves more in the middle of the leaf, often leaves a few layers of robust leaves appear a diseased leaf. Its typical symptoms are: normal growth of the outer leaves. After peeling off the bulbs, it can be seen that some leaves turn white, yellow, and dry from the leaf margins, and the mesophyll is dry paper-like. Third, prevention and control measures In order to avoid the occurrence of Chinese cabbage dry heartburn and improve the yield and quality of Chinese cabbage, in addition to the selection of disease-resistant varieties, reasonable rotation, and appropriate sowing, the following measures should also be taken: 1. Reasonable fertilization. Base fertilizer is dominated by organic fertilizers and supplemented by chemical fertilizers. The per acre Shi cooked organic fertilizer 4000-5000 kilograms, superphosphate 50 kilograms, potassium sulfate 15 kilograms and a small amount of urea, increase soil organic matter content, improve the soil structure, promote plant robust growth. At the same time, it is necessary to choose a land with a flat land, a loose soil, and a well-drained land, and try not to choose a saline-alkaline land with low topography. The watering is even and the water quality is non-pollution. Acidic soil should be increased in lime and the pH of the soil should be adjusted. 2. Reasonably water. During the growth period of Chinese cabbage, the water supply should be uniform. In case of drought, it should be watered in time. Small water irrigation should be implemented to make the soil dry and dry. After irrigation, the soil should be ploughed in time to prevent compaction, improve soil structure, and prevent salt and alkali from rising. Do not flood flooding, so as not to damage the roots of the field by the pods, hinder the absorption. Especially during the rosette period, attention should be paid to changes in soil moisture. Rainy years should be properly cultivated and drained. 3. The appropriate calcium. Foliar spray calcium fertilizer can not only promote the growth of Chinese cabbage, improve the quality, but also effectively prevent the occurrence of Chinese cabbage "dry heart". Usually from the beginning of the Chinese cabbage rosette stage, every 7-10 days, the center leaf is sprayed with 0.7% calcium chloride and 50ppm naphthylacetate solution or 1% superphosphate solution 50kg. When spraying, concentrate on the center leaf and spray 3-5 times. 4. Supplement with manganese fertilizer. It can be sprayed with 0.1% potassium permanganate solution or 0.1% manganese sulfate solution for 50 kg at the rosette stage, sprayed once every 7 days, sprayed 2-3 times, and mixed with calcium. . 5. Pay attention to the choice of mouth. When planting Chinese cabbage, joint crops such as cabbage and tomato with high calcium absorption should be avoided. If the umbilical rot is found to be serious during the tomato fruiting period, the calcium deficiency in the area is serious, and it is best not to plant cabbage or supplement calcium fertilizer in the autumn quinoa. Walking sticks – walking sticks feature comfortable handles, rubber ferrules and easy height adjustments. Walking sticks offer varied support, from height adjustable sticks to tripod and tetrapods that have three or four feet instead of one, and heavy duty sticks if you have a higher user weight. We even offer a walking cane with a seat that is ideal for a brief rest during long walks. Walking sticks have differing handles with wooden, contoured and curved handles available Walking Stick Tools,Multi Purpose Walking Stick,Walking Stick Making Tools ,Walking Aid For Elderly Active Life Healthcare Co.,Ltd , https://www.alh-med.com