Grasp the main contradiction in the birth of cotton

Cotton is native to tropical and subtropical regions and is a perennial woody plant. After a long period of manual selection and cultivation, it gradually moved northward into temperate zones and evolved into annual crops. Within one year sowing, budding, flowering, bolling, and seed ripening to complete the growth cycle. In the growth and development of cotton, it still retains some of the original characteristics of perennial plants. These characteristics are closely related to obtaining high-yield, high-quality cotton products, and are also the basis for adoption of technical measures.
Cotton has unlimited growth habits. In the growth and development process, as long as the temperature, light, moisture and other conditions are appropriate, it will continue to grow, grow, bud, flower, and grow like a perennial plant. Therefore, the most significant feature of cotton reproduction is that most of the time in life is synchronized with vegetative growth and reproductive growth. On the surface, budding only used vegetative growth, but strictly speaking, the differentiation of fruit buds started from the true leaf stage of 2, 3, and it can also be said that the cotton seedlings began reproductive growth in the interior very early; After boll opening, as long as the conditions are met, new branches can be sprouted on the old stems of cotton, and new vegetative growth begins.
The vegetative growth and reproductive growth are a pair of contradictions in a unified body, which are interdependent and promote each other; they also restrict each other and influence each other. Without vegetative growth, reproductive growth loses its source of nutrients and it will be depleted. However, if there is no reproductive growth, it will not be possible to pass on offspring, and it will eventually end up in vegetative growth. The two are transformed into each other through the seed. The seeds are both the result of reproductive growth and the beginning of vegetative growth. Both are unified and contradictory. Excessive strength of either side will weaken the other side and threaten the other side; Only the coordinated development of vegetative growth and reproductive growth and long-term development can yield higher yields; the better the coordination, the more fully developed and the higher the yield. It can be seen that the contradiction between vegetative growth and reproductive growth is the main contradiction that runs through the life of cotton and is a fundamental contradiction. Grasping this contradiction, it seized the core of cotton field management. How to coordinate this contradiction from beginning to end is the essence of cotton field management.
After budding of the cotton field, although the cotton plants are still dominated by vegetative growth, the contradiction with reproductive growth begins to appear and the two are in a sensitive state. The cotton plants continue to grow new shoots and new leaves, and their young buds continue to grow. They have the power to spend their energy in flowering. It is most beneficial for both sides to have stable growth at this stage, and all parties should not be too strong or too weak. When there are conditions conducive to vegetative growth, such as fertile soil or excessive nitrogen fertilizer, or high temperatures and high rainfall, long cotton seedlings will be made with high feet, long sections, thin culms, large leaves, weak buds, and small buds. In addition, the buds will fall off, which means that the two are disordered. When there is an acceleration in reproductive growth, such as soil thinness or excessive application of phosphate fertilizer, or drought, it will cause short trees, small leaves, Shrinking, densifying, budding, flowering in advance, and flowering in parallel, this is also an imbalance of nutrition and reproductive growth, which will affect the production of high-yield shelves. Bud management still insists on cultivating, keeping crops, and promoting roots. If balanced fertilization is not achieved before sowing, it is necessary to apply nitrogenous fertilizer or phosphorus and potash fertilizers to reach a balance. Because the ground does not reach the fertilization effect, it can be sprayed with foliage. In order to realize the coordinated growth in the middle and later stages, budding stage should be sprayed with dilute amine to lightly control, and the time and dose of medication vary according to species, soil strength, climate, soil moisture and cotton growth, and the general control volume is 0.3 per mu. 0.8 grams. Due to the fact that the cotton plants in the bud stage are not large, the light and air are sufficient, and the northern part is arid, the competition between individuals is not yet intense, and the contradiction between nutrition and reproductive growth is easy to coordinate.
After flowering and tying, the contradiction between nutrient and reproductive growth of cotton plants begins to intensify, and vegetative organs and genital organs compete for nutrients and water vigorously. If they are not coordinated or coordinated properly, they will suffer losses; if fertility grows, and the nutritional growth is weak, it will Cause premature aging; vegetative growth is strong, reproductive growth is weak, will form a leggy; the final result will lead to increased abscission rate, reduce the rate of ringing and the number of bolls per plant, reduce the weight of single boll and reduce production. If the density of cotton fields is not properly set, coupled with the impact of weather changes, it will also lead to fierce competition among cotton plants, thus complicating the contradiction. For cotton fields with high soil fertility or signs of prosperous growth, it is necessary to control the amount of nitrogen fertilizers and increase the amount of diamines. If they are still uncontrollable, it is imperative to cut off or remove the middle and lower leaves of the main stem to reduce the leaf area appropriately; If it is still uncontrollable in the later period, it is necessary to cut branches, fight the heart, go to the old leaves, and if necessary, push the strains and ridges to alleviate the contradictions. For cotton fields with signs of premature aging, they must be topped with fertilizers in advance and nitrogen fertilizers should be added to increase the frequency of foliar sprays. If necessary, gibberellin (920) should be sprayed to promote fast-growing and more vegetative organs.
In contrast, the management of weaker vegetative cotton fields is easier to manage than the management of leaner cotton fields. For cotton fields and oyster fields with high fertility, attention should be paid to the selection of varieties that are resistant to water and fertilizer, control of the amount of nitrogen fertilizers, pay attention to supplemental phosphorus and potassium fertilizers, appropriately reduce the density, and appropriately control and increase the amount of drugs in advance. It is necessary to control the blades not too large. The color of the leaves should not be too deep; otherwise, the output of high-fertilizer fields will be reduced. This situation is often encountered in production. For the cotton fields affected by the disaster, we must first promote nutrient growth. There are hopes that we will have branches; if we do not see flowers in July, we must not be discouraged. We only need to give birth to fruit sticks and give birth to budding; in early August, we need to rationalize the weak sticks in the dense branches. Control, to prevent excessive growth of nutrients, each branch to stay fruit branches, at the end of July hit the top of the heart, leaving the flowers opened before September 5, there will be a certain amount of production.
If the management art of cotton is summed up in two words, the word “promoting and controlling” can be used. This is the essence of cotton management. It is well applied and requires superb skills. To promote control and control thoughts, to promote control, to promote control, and to promote control; when watering, it is necessary to think that it may rain after being poured; when it rains, it is expected that it may be affected by drought; early flowering and flowering may cause premature aging. To remove early buds early flowers, weakening reproductive growth; late-onset cotton fields in the promotion but also pay attention to prevent excessive growth of nutrients; different density, different soil strength, different nature, use different methods Because there are unexpected circumstances, sometimes there is patience, but sometimes patience and wrong; poor fertilization for 1 day, the effect may be very different; when necessary, promotion, control may be carried out at the same time, while fertilizing, and control; Not only prevent premature aging, but also prevent prosperous growth. Although "promoting and controlling" does not represent all of cotton management, grasping the main contradiction between cotton's vegetative growth and reproductive growth will capture the core of cotton management and will greatly improve cotton management technology. After all, tapping the high yield potential of cotton ultimately depends on the coordination and resolution of the main contradictions in the birth of cotton. This is an “addition”; while the prevention of pests and other disasters is to minimize the losses caused by disasters, and it is better to “subtract”. Compared with other crops, cotton management has certain uncertainties and is also challenging; it will also stimulate people's perseverance and interest; for this reason, the management of cotton fields is very attractive to people and it is a very Charm work. Today, although we have a certain distance to masterfully control the art of tube cotton, as long as we continue to explore and continue to summarize, this distance will gradually shorten.

Deep Intra Uterine Insemination Catheter

Deep Intra Uterine Insemination Catheter,Artificial Insemination Catheter,Animal Softrandtificial Insemination Catheter,Silicone Veterinary Insemination Catheter

Jinan Mucho Commercial Inc. , https://www.muchovet.com