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Jiangsu Sheyang Cotton Association: Rainy Days Have Increased The Rate Of Cotton Bolls And Shedding.

2010/9/1 11:16:00 44

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Since the "heat stroke" began in August 23rd, the weather in Sheyang county has been affected by southwest airflow and cold air.

The current precipitation is characterized by long rain periods and heavy rainfall.

From 24 to 28 days, 5 days in a row, it rains every day, and the total rainfall reaches 92.4 millimeters, which is 8 times the total rainfall of 11.2 millimeters in the same period last year.

And the sunshine hours are very few during the period.

From the beginning of the 23 day cloudy weather to the 28 day, the rainfall stopped, and the total sunshine duration was almost zero for 6 days before and after.

According to field investigation, due to the preceding paragraph

cotton

The growth is vigorous, and some cotton fields are concealed in large areas. After a continuous rainy weather, dark soil is seriously saturated, and the soil water content is saturated. The roots of cotton plants are in an anaerobic state, and the absorption function of roots is inhibited, and the supply of nutrients is blocked.

On the 29 and 30 day, the weather became clearer and the maximum daily temperature reached 30 degrees. At noon, under the strong light, the ppiration of the upper part of the cotton plant increased, and some cotton fields appeared wilting, which directly affected the normal growth of cotton, resulting in a significant increase in the abscission rate of the bolls and bolls.

County Station and county

Cotton Association

The survey results of cotton growth and development showed that the average rate of abscission of bolls and Bolls in the whole county reached 43.52% by the end of August 30th, representing an increase of 18.84 percentage points compared with 24.68% in August 20th.

And the proportion of Huang Tao Tao is also increasing.

When the survey was conducted in August 20th, there were no rotten bells in the field. Although 25 days of investigation appeared, the average number of individual plants was only 0.71, but when it was investigated on the 30 day, it had risen to 1.09.

Even so, the rate of abscission and the number of rotten peaches per plant were 1.86% lower and 0.135 less than the same period last year.

Huang Guifa, a cotton grower in the East Village of couplet Township, said that he had planted 7 acres of cotton this year. The peach yield of cotton was very low in those days. The flowers were washed by rainwater on the same day. The pollination was insufficient, and the flowers were less than two days after the flowers were withered. However, the rate of peeling was not the highest.

In response to the current cotton growth and subsequent trend, the County Agricultural Technology Department has put forward the current and future stage.

cotton field

Management meaning.

First, grasp the cotton field management based on disaster resistance.

Over the next month or so, typhoons and other natural disasters are frequent. We must do our best to ensure the smooth flow of water in the cotton fields.

At the same time, we should remove the empty branches and old leaves of cotton plants at the same time, and strive to improve the ventilation and light pmission conditions of cotton fields and reduce the soil moisture in cotton fields.

The two is to make good use of foliar fertilizer to control cotton growth.

According to the present cotton growing situation, we should pay attention to the application of foliar fertilizer in some cotton fields, and prevent the excessive use of fertilizers to lead to greedy growth. We should try our best to improve the nutritional supply of cotton plants, enhance the function of leaf pportation, promote healthy growth and increase the rate of peach formation.

The three is to remove the edge of the heart and control the growth of the invalid bud.

When the temperature is gradually dropping, the accumulated temperature can not meet the needs of peaches. The edge heart should be removed as soon as possible to control the growth of the invalid buds, so as to reduce the ineffective consumption of nutrients and ensure that there is enough nutrient supply in the top of the autumn peaches.

The four is to see insects and reduce production losses.

Later stage pests not only imperil the formation of yield, but also affect the quality of cotton.

At present and in the future, we should pay great attention to the prevention and control of the four generation of the bug, the four generation of Helicoverpa armigera and the whitefly and so on, so as to reduce the loss of yield and quality caused by diseases and insect pests.