Planting Technology Lists
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Hubei: Current growth situation of cotton and suggestions on field management
According to the investigation results on August 5, most cotton fields in our city have entered the flowering and boll period. The average density of cotton fields in our city is 1266 plants/mu. The average plant height is 90.2 cm, the number of fruit branches is 15.8, the number of empty branches is 0.1, the total number of fruit nodes is 51.1, the number of large peaches is 5.1, the number of small peaches is 2.3, the number of flowers is 1.4, the number of buds is 31.6, the number of buds and bolls is 11, and the rate of buds and bolls dropping is 21.6%. In view of the current situation, the current field management should mainly grasp the following points: First, the main attack on yield, grasp the "two disputes" This year's cotton growth is relatively high.
2019-01-16 -
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.
2019-01-16 -
Effective prevention and control of cotton stiff seedlings
After cotton transplanting, it is the plum rain season, with low temperature, more rainy days and less light, which leads to the slow turning green of cotton seedlings, the postponement of flower bud differentiation and the formation of "rigid seedlings". The main types of rigid seedlings are as follows: first, waterlogging damage to rigid seedlings. It is common in low-lying cotton fields, where waterlogging seedlings are formed by overcast and rain for a long time, resulting in blackening of roots, gray-green leaves and slow growth. Second, drought harms stiff seedlings. Mainly due to drought, the leaf yellow dry red wine, the amount of new roots is less, the growth is very slow, and the proportion of red stems is large. Third, fat harms stiff seedlings. The main reason is that the application of base fertilizer is too shallow.
2019-01-16 -
Causes of premature senescence in cotton field and its control countermeasures
With the planting of cotton in the field year by year, the phenomenon of premature senescence occurs from time to time, which has become an important reason for restricting the improvement of cotton yield and quality in the field. First, the causes of premature senility. The continuous cropping of cotton in the cotton planting area of the remaining cotton field for many years leads to the lack of organic matter in the plough layer, which can not meet the effect of continuous soil fertilizer supply. At the same time, continuous cropping caused the accumulation of bacteria in the soil and the decrease of the number of insect-resistant bacteria, which hindered the normal growth of cotton roots, thus affecting the upper growth of cotton and leading to premature senescence. two。 Cotton
2019-01-16 -
Prevention and treatment of premature senescence of cotton in the later stage
The internal reason for the premature senescence of cotton in the later stage is that after the cotton growth entered August, there was a fierce competition for nutrients among roots, stems, leaves and bolls, resulting in an imbalance between supply and demand of nutrients; the external cause was the lack of water and fertilizer in the later stage of cotton fields, such as phosphorus or potassium deficiency; and some cotton fields caused serious damage to cotton leaves because of excessive spraying times or excessive concentration of pesticides in the later stage. It should be pointed out that the fundamental measure to prevent premature senescence of cotton is to strengthen the infrastructure of cotton fields, that is,
2019-01-16 -
Prevention of premature senescence of cotton in the later stage
Premature senescence of cotton plant means that when the growth center turns to reproductive organs after the cotton plant enters the flower and boll stage, if the cotton plant is malnourished and the bud and boll compete with the vegetative organs for the organic nutrients produced by leaves, the vegetative growth will be more restrained. After this kind of cotton plant bears several cotton bolls in the middle and lower part, the upper part of the cotton plant appears the phenomenon of vegetative growth decline, such as top tip, hard hair, red stem to the top, thin and yellow leaves, which is the premature senescence of cotton plant. Premature senescence of cotton plants generally occurs in stiff soil, poor fertility and poor root growth.
2019-01-16 -
Measures to prevent premature senescence of cotton
Now is the critical period of cotton bud and boll management. in order to avoid premature senility, fellow villagers should strengthen management and pay attention to spraying foliar fertilizer. the specific methods are as follows: urea 22, potassium dihydrogen phosphate 1, or potassium fulvic acid 20-30 grams, naphthalene acetic acid 3-5 milliliters, Tianyi 30 grams, in order to prevent burns of leaves, the above fertilizers and chemicals should first be hydrated into mother liquid with a small amount of water, and then put into the sprayer and sprayed with water. One mu of land is sprayed with two sprayers every 7-10 days until September 20 of the Gregorian calendar.
2019-01-16 -
Main causes and Preventive measures of premature Senescence of Cotton under drip Irrigation
First, the main reasons for the premature senescence of cotton planting with high density. Variety factor varieties are not resistant to premature senility. In recent years, there are many varieties of cotton, some varieties of aging, degradation, some varieties of their own disease resistance and early aging resistance is poor, or not suitable for high-density planting, resulting in premature senescence of cotton. two。 Environmental factors the suitable sowing time of precocious cotton in ① temperature is 5 cm ground temperature and 12 ℃. If sowing is too early or cold injury occurs at seedling stage, the root system function of cotton is easily damaged due to low air temperature, slow root growth and serious disease.
2019-01-16 -
Foliar spraying of Cotton to prevent premature senescence
In the later stage of cotton growth, the root activity gradually aged and the ability of absorbing fertilizer and water decreased correspondingly. Spraying fertilizer solution was adopted to promote the absorption and utilization of fertilizer, prolong the functional period of leaves, improve the root activity and increase the boll weight. The suitable concentration of fertilizer solution is 1% urea, 50 kg water and 0.5 kg urea; potassium dihydrogen phosphate and calcium superphosphate should be 1% Mel 1.5%. Calcium superphosphate should be soaked for 24 hours. After the impurities are precipitated, the clarification solution should be poured out slowly, diluted with water and sprayed. At the same time, Tianfengsu or Shuofeng 481 can be added properly.
2019-01-16 -
Beware of cotton premature senescence in summer
After the emergence of premature senescence of cotton, remedial measures are of little significance, focusing on prevention. The first ten days of August is the peak period of cotton flowering and bolling. if the vegetative growth and reproductive growth are well coordinated, it is not easy to senescence prematurely. The earlier the occurrence of premature senility, the more serious the yield reduction. In serious years, premature senility occurred in the middle and late August. How to prevent cotton premature senescence and increase cotton yield is an urgent problem to be solved in cotton production. Here are some measures to prevent cotton premature senility. Pay attention to the way of watering. The summer drought leads to the premature senescence of cotton. If there is no rain in Fuli, it should be watered in time.
2019-01-16