Premature ageing of cotton is "premature senility," which is a phenomenon in which physiological and biochemical processes in cotton plants age earlier than normal cotton plants. The phenomenon of premature aging of cotton occurs almost every year, resulting in increased shedding of cotton buds and reduction in boll weight, resulting in a sharp decline in cotton yield and poor fiber quality. There are many factors causing premature aging of cotton, and various factors interact with each other, affect each other, there are physiological and biochemical internal causes of cotton varieties, there are also poor weather conditions, soil nutrients lack or imbalance, improper management of fertilizer and water and other external causes.
1, Breeding good varieties, appropriate sowing. A variety of multi-resistance varieties with advanced root system, strong growth potential, strong late leaf function, and high yield potential per plant were selected, such as Noza 1, No. 2 and Hengmian No. 4. General April 20-25 narrow film covering planting is appropriate.
2, a reasonable rotation. Implementing crop rotation can inhibit the accumulation of pathogens, reduce pests and weeds, regulate soil nutrients and water supply, and improve the physical and chemical properties of soil. It is of great significance for promoting robust growth of cotton and preventing premature aging.
3, keep the leaves and shape the multi-stem plant type. The cotton leaves do not go to the branches. When the cotton blossoms (July 1-5), the tips of all the branches of the leaves are removed at once and the main stems are conventionally topped (July 15-20) to form multi-stem plant-type cultivation. The use of leaf shoots to divert mineral nutrients and moisture and promote organic nutrients, reduce axillary bud growth, promote root development, long leaf function, and reduce premature aging of cotton plants.
4, balanced fertilization. Before the watering, the concentration of N, P and K is concentrated to promote the uniform downward movement of the fertilizer. Fertilization should be combined with organic fertilizers and inorganic fertilizers, combined with a large number of elemental fertilizers and trace element fertilizers, and increase the proportion of potash fertilizers. At the same time, attention should be paid to the application of multiple microelement fertilizers on the leaves after budding.
5, timely removal of film, deep cultivator. After entering Shenglei, the film should be uncovered and deep cultivating in order to promote the root bar and ensure the supply of fertilizer and water in the later period.
6, scientifically control pests and diseases. To be based on comprehensive prevention and control, supplemented by chemical control, the use of scientific methods of prevention, minimize the number of chemical pesticides used and the amount of application, strictly control the concentration of drugs in the late.
1, Breeding good varieties, appropriate sowing. A variety of multi-resistance varieties with advanced root system, strong growth potential, strong late leaf function, and high yield potential per plant were selected, such as Noza 1, No. 2 and Hengmian No. 4. General April 20-25 narrow film covering planting is appropriate.
2, a reasonable rotation. Implementing crop rotation can inhibit the accumulation of pathogens, reduce pests and weeds, regulate soil nutrients and water supply, and improve the physical and chemical properties of soil. It is of great significance for promoting robust growth of cotton and preventing premature aging.
3, keep the leaves and shape the multi-stem plant type. The cotton leaves do not go to the branches. When the cotton blossoms (July 1-5), the tips of all the branches of the leaves are removed at once and the main stems are conventionally topped (July 15-20) to form multi-stem plant-type cultivation. The use of leaf shoots to divert mineral nutrients and moisture and promote organic nutrients, reduce axillary bud growth, promote root development, long leaf function, and reduce premature aging of cotton plants.
4, balanced fertilization. Before the watering, the concentration of N, P and K is concentrated to promote the uniform downward movement of the fertilizer. Fertilization should be combined with organic fertilizers and inorganic fertilizers, combined with a large number of elemental fertilizers and trace element fertilizers, and increase the proportion of potash fertilizers. At the same time, attention should be paid to the application of multiple microelement fertilizers on the leaves after budding.
5, timely removal of film, deep cultivator. After entering Shenglei, the film should be uncovered and deep cultivating in order to promote the root bar and ensure the supply of fertilizer and water in the later period.
6, scientifically control pests and diseases. To be based on comprehensive prevention and control, supplemented by chemical control, the use of scientific methods of prevention, minimize the number of chemical pesticides used and the amount of application, strictly control the concentration of drugs in the late.
Testing Equipment,Clinical Testing Equipment,Vacuum Blood Collection Tube,Disposable Virus Sampling Tube
Henan Anbang Medical Supplies Co., Ltd. , https://www.anbangmedical.com