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Technology Promotion: Seize The Main Contradiction In Cotton Growth

2013/3/22 12:39:00 48

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Technology Extension Cotton Planting Cotton Growing Contradiction

> a href= "http://www.91se91.com/news/" > cotton > /a > has unlimited growth habit. In the course of growth and development, as long as temperature, light, water and other conditions are suitable, it will continue to grow branches, long leaves, buds, flowers and bolls, like perennial plants, and continue to grow and develop. Therefore, the most notable feature of cotton growth is the simultaneous growth of vegetative growth and reproductive growth in most of the life. On the surface, buds only grow vegetative before, but strictly speaking, the differentiation of fruit shoots starts from 2 or 3 true leaf stages. It can be said that cotton seedlings began to grow in the interior very early. After the boll opening, as long as conditions are available, cotton stems can sprout new branches and start new vegetative growth, so that the two can enter the long time. 
 vegetative growth and reproductive growth are a pair of contradictions in a unity. They are interdependent and mutually reinforcing, and are mutually restricted and interacted. Without vegetative growth, reproductive growth will lose its source of nutrients, and it will dry up; but without reproductive growth, it will not be able to pass on the offspring, and eventually will result in vegetative growth. The two spanform each other through the seed. The seed is not only the result of reproductive growth, but also the starting point of vegetative growth. The two are both unified and contradictory. The excessive strength of either side will weaken the other party, which is a threat to the other side. It is not the premature decay of cotton fields, but the result of the long run. Only by coordinated development and rapid development of vegetative growth and reproductive growth can higher yield be achieved; the better coordination, the more developed, the higher the yield. It can be seen that the contradiction between vegetative growth and reproductive growth is a major contradiction throughout cotton life and is a fundamental contradiction. To seize this contradiction, we have grasped the core of cotton field management. How to coordinate this contradiction from beginning to end is the essence of cotton field management. 
 cotton fields are still mainly vegetative growth after bud emergence, but the contradiction with reproductive growth is beginning to appear, and the two are in a sensitive state. Cotton plants continue to grow new branches and new leaves, and the young buds are constantly increasing, which will accumulate the power for flowering. This stage is most beneficial to both sides. When there is an acceleration of vegetative growth, such as soil fertility or excessive nitrogen, or high temperature and rain, cotton seedlings will grow tall, long, culm thin, big leaves, weak buds and small buds. Even more, they will cause young buds to fall off. This is the imbalance between the two. When there is an acceleration of reproductive growth, such as poor soil fertility or excessive phosphorus application or dry drought, it will cause dwarf, Ye Xiao, shrinks, knots, buds, flowers and flowers in advance. This is also a disturbance of nutrition and reproductive growth. During the bud management, we should insist on cultivating, preserving soil moisture and promoting root. When we did not achieve balanced fertilization before planting, we should use the nitrogen fertilizer or phosphorus and potash fertilizer to achieve the balance. Because the dry land can not reach the effect of fertilizer application, it can be sprayed on the leaves. In order to achieve the coordinated growth in the middle and later stages, the sprout period should be controlled by spraying and reducing amine, and the time and dosage of medicine should vary according to varieties, soil fertility, climate, soil moisture and cotton growth. The general control amount is 0.3---0.8 grams per mu. Because of the lack of cotton and light and gas in the bud stage, the drought is not intense in the north, and the contradiction between nutrition and reproductive growth is easy to coordinate. ".
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 flowering and boll setting, < a href= > http://cailiao.sjfzxm.com/Matertial/show/default.aspx > cotton > /a > the contradiction between nutrition and reproductive growth starts to intensify, and the vegetative organs and reproductive organs will compete for nutrients and water violently. If not coordinated or mismatched earlier, they will suffer losses; reproductive growth and weak vegetative growth will lead to premature senescence; vegetative growth and weak reproductive growth will lead to prolonged growth; the final result will lead to increased rate of abscission, reduction of boll setting rate and boll number per plant, reduction of single boll weight and reduction of yield. If the density of cotton field is not set properly, plus the influence of weather changes, it will also cause fierce competition among cotton plants and make the contradiction more complicated. For cotton fields with high or high soil fertility, it is necessary to control the amount of nitrogen fertilizer and increase the dosage of reduced amine. If it is still uncontrollable, we should cut off the roots or pick up the middle and lower leaves of the main stem to reduce the leaf area appropriately. For cotton fields with signs of premature aging, we should properly apply fertilizer in advance, increase nitrogen fertilizer, topping the heart ahead of time, increasing the frequency of foliar spraying, and spraying gibberellin (920) if necessary, prompting fast growing and multiple vegetative organs. 
Compared with P, the management of cotton fields with poor vegetative growth is more effective than the management of cotton fields. For cotton fields and stubble fields with high fertility, we should pay attention to selecting varieties that are resistant to water and fertilizer, control the amount of nitrogen fertilizer, pay attention to supplement phosphorus and potash fertilizer, properly reduce density, properly control and increase the dosage in advance, we must control the leaves can not be too big, and the leaf color can not be too deep, otherwise, the output of high fertility will decrease, which is often encountered in production. For hailstorm cotton fields, first of all, it is necessary to promote vegetative growth, and there is hope for branches. Even if there is no flower in July, do not lose heart. Just produce fruit branches and produce buds. At the beginning of August, the branches should be removed and properly controlled to prevent excessive vegetative growth. ".
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 If two words are used to generalize cotton's < a href= "http://www.91se91.com > > management art < /a >, it can be used to" promote and control "two words, which is the quintessence of cotton management. There are promotions; when watering, we should think that it may rain after watering; when it rains, we should anticipate that it may be drought later; early flowering and blooming may lead to premature senescence; early flowering should be taken off, and reproductive growth should be avoided; at the same time, the cotton fields should be taken care of to prevent excessive vegetative growth; different density, different soil fertility and different soil properties should be controlled by different methods; because there are accidents in the sky, sometimes patience is good, but sometimes there is tolerance and wrong; 1 days of fertilization, the effect may be quite different; if necessary, promotion and control may be carried out at the same time; fertilization should be carried out at the same time, while fertilization should be controlled at the same time. Think of control, control, think, promote, control, and control. Although "promotion and control" can not represent all the cotton management, but grasping the main contradiction of cotton nutrition growth and reproductive growth, we will seize the core of cotton management and greatly improve the management technology of cotton. After all, to tap the high potential of cotton production depends on the coordination and resolution of the main contradictions in cotton production. This is "addition"; and prevention and control of pests and diseases is to minimize the losses caused by disasters and to do a good job of subtraction. Compared with other crops, cotton management is uncertain and challenging, so it will stimulate people's willpower and interest. Because of this, the management of cotton fields is very attractive to people. It is a very attractive job. Although we have a certain distance to skillfully manage the art of cotton control today, the distance will gradually shorten as long as we keep exploring and constantly summarizing. 
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