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Prevention of premature aging of cotton
In early August of this year, due to more rainwater, premature aging of cotton appeared in some places, which directly affected the yield and quality of cotton. The majority of cotton farmers must pay great attention and take effective measures to prevent them. First, the cause of premature aging of cotton is that due to the increasing difficulty of management of cotton fields in the later period, such as delaying the drainage, the soil compaction after the rain, the poor permeability of the soil, the impeded root growth, the reduced absorption capacity, and the significant deterioration of the function, the cotton plant cannot be obtained. With normal nutrient and water supply, premature aging of cotton appears, especially in the hilly areas. The second is early-onset cotton fields, where the application of peach fertilizer is early, the amount of fertilizer is too little, and supplementation of fertilizers cannot keep up, and the function of various organs is naturally degraded. The nutrients cannot meet the needs of the growth of cotton plants. Therefore, it is difficult for cotton plants to be tender in August. The third is that the blade has a short life span and a low function. The life span (normal vitality) of a normal blade is generally about 8 weeks. Due to incomplete control of insect pests and diseases, they were damaged by red spider, cotton aphid, Spodoptera litura, red (yellow) leaf blight, early weeping, and yellow wilt. Defertilization was early, resulting in damage and even shedding of leaves. Fourth, due to the introduction of genes, insect-resistant cotton has undergone changes in its physiology. The fifth is the transplanting of cotton seedlings with nutritious seedlings, which has the characteristics of easy-to-early emergence and rapid peaching. Second, the specific measures to prevent premature aging of cotton 1, should make up for fat as soon as possible. In order to make cotton tender in August, it is crucial to prevent premature aging and supplementing fertilizer. For the bottom of the fat foot, peach weight, thick cotton growth, crown (top) hypertrophy, the main stem more green leaves, dark green leaves, stamina can not be fertilizer. For pre-fat peaches and peaches, the early-decaying varieties in the Yellow River drainage area, sand-heavy soils, low-lying water-stained, soil-poor, and thin-stemmed plots should be topdressed. It is advisable to make up for the fat and it must be finished before August 15th. Application of urea 6 kg per mu. The fertilization method can be applied to the soil before the rain. If no rain is available, the fertiliser can be applied. 2, Shallow loose soil in time. After the rain, for cotton fields that have not been enclosed, especially in the hilly areas, the soil should be shredded in shallow soil in time, and the loose soil must not be too deep so as not to damage the root system and destroy the soil. If you do not want to loose soil, you can spray the soil conditioner “no deep plowingâ€. Spraying “without deep plowing†can break the compaction, loosen the soil, and improve the soil structure; it can fully exert the effect of fertilizer, promote the normal growth of the root system, and increase the root absorption capacity. . Spraying “without deep plowing†method, 200 ml per mu (1 bottle), watered 50 kg, evenly sprayed on the earth. Cotton fields without soil can not be sprayed so as not to cause lodging of cotton plants. 3, pest control can not relax. Due to the sudden rain after the rain, the soil was severely compacted and there was no timely soil loosening. The soil was poor in air permeability. Combined with the lack of potassium, red (yellow) blight was most easily caused. The specific prevention and control methods are as follows: Firstly, the loose soil is used to break the board, and combined with loose soil topdressing urea, 7.5 kg of potassium chloride is applied. The second is to spray "potassium world" or "potassium treasure" 2-3 times to implement extra-root potassium supplementation. The third is to carefully clean up the ditch to prevent further water damage.