Hubei: Current growth situation of cotton and suggestions on field management
According to the results of the survey on August 5, most of the cotton fields in our city have entered the flowering and boll stage. The average density of cotton field in our city is 1266 plants / mu. The average plant height is 90.2 cm, the layers of fruit branches are 15.8 layers, the empty branches are 0.1 layers, the total number of fruit nodes is 51.1, big peaches are 5.1, small peaches are 2.3, flowers are 1.4, buds are 31.6, buds and bolls are shedding 11, and the shedding rate of buds and bolls is 21.6%.
In view of the current situation, the current field management should mainly focus on the following points:
First, focus on per unit yield and grasp the "two disputes"
The growth of cotton this year is weaker than that of the same period. In order to achieve a higher level of per unit yield, we need to pay attention to two competitions, that is, early competition and more competition for autumn peaches. The basic goal is "2, 3, 4, 5": 2, that is, 20 layers of fruit branches per plant; 3, 2-3 peaches per layer; 4, more than 40 peaches per plant; 5, seed cotton yield of more than 500 jin per mu. Second, highlight the key points and grasp the "three robberies"
The focus of field management should be reflected in grasping the three robberies (that is, ploughing, fertilizer grabbing, and prevention).
1. Rush ploughing. At the present stage, we should pay close attention to ploughing and loosening the soil and ridging. It is necessary to seize the time when the field is dry, loosen the soil and break the board in time, cool down and aerate, promote root development, and improve the ability of drought resistance, lodging resistance and waterlogging resistance of cotton in the later stage.
2. Scramble for fertilizer. At present, we must re-apply peach fertilizer, and all fields that have not applied flower fertilizer should be re-applied flower and boll fertilizer immediately. To achieve hole application or ditch deep application, 30-40 jin of urea plus 15-20 jin of potassium chloride per mu. At the same time, it is also necessary to apply good peach fertilizer. Use sufficient fertilizer to make up for the loss of nutrients in the early stage and the nutrient needs of autumn peaches in the later stage. Special attention should be paid to the application of potash fertilizer to prevent cotton field withering and early senescence, generally applying 10-20 jin of urea plus 10-15 jin of potassium chloride per mu.
3. Take precautions. It is necessary to control cotton diseases and insect pests. Cotton pests are mainly cotton bollworm, cotton aphid, red spider, blind Toona sinensis, and cotton diseases are mainly cotton wilt and Verticillium wilt. On the basis of grasping the frequency vibration insecticidal lamp to trap moths, according to the control standards of various insect pests and in accordance with the requirements of "Xiantao Plant Protection", we should select the right pesticides and control them in time to ensure the healthy growth of cotton.
Third, break the rules and fourth "postpone"
One is to postpone the time to hit the top. At present, due to the increase of the amount of fertilization, the growth of leaf branches is exuberant and the number of superfluous buds increases, so we should pay close attention to the superfluous buds and get rid of the old leaves of empty branches. at the same time, when the four fruit branches grow, we should pay attention to them as soon as possible, which can not only reduce unnecessary nutrient consumption, but also improve ventilation and light transmission conditions. The topping of cotton this year can be postponed to August 10-15. The second is to postpone the time of replenishing peach fertilizer. This year, the application of peach fertilizer for cotton can be postponed to August 15-25; the third is to postpone the termination time of pest control and strengthen the guarantee work of pest control; and the fourth is to postpone the pulling time of cotton. Implement small ploughing races, cotton field interplanting and interplanting, rape, try to make autumn peaches grow velvety and open bolls normally.
- Prev
The field management of wheat and cotton should keep up with it.
First, the growth characteristics of wheat interplanting cotton. In view of the characteristics of wheat cotton intercropping, cotton seedlings after wheat are thin, slow in growth and development, late budding and flowering, easy to grow in the middle stage, and easy to mature late in the later stage, and the cotton seedling stage is affected by rainfall and low temperature, and the disease in the seedling stage is more serious. The field management after wheat must be based on the word-ldquo;-rdquo; and pay close attention to the word-ldquo;-rdquo; to promote the rapid growth and development of cotton seedlings so as to make up for the lack of growth at seedling stage. Second, snatch out the stubble and loosen the soil
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Causes and Control of stiff seedlings of Cotton
During the transplanting period, cotton seedlings are often affected by abnormal climate, weak seedlings, inadequate cultivation measures and other factors, which slow down the growth process and reduce the yield of cotton. The causes and prevention of cotton stiff seedlings are introduced as follows: first, reason 1. The quality of cotton seedlings is poor. The ① seedling bed is insufficient to fertilize and form small and weak seedlings, the growth potential is poor, and the living trees are slow. ② nursery bed was improperly managed to form tall seedlings and prosperous seedlings. After transplanting, too much water was lost and the planting injury was serious. two。 The temperature is not suitable. A lot of places.
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