Sheyang County Cotton Association: Recent Precipitation Affects Cotton Growth.

Since July, Jiangsu Province Sheyang County There was a continuous rainy weather. There were more precipitation, less sunshine, some cotton fields were flooded, and waterlogging was serious, which was very unfavorable for cotton growth.

1. Precipitation and disaster

By the trough and the South Inverted trough Since July 3rd, Sheyang county has suffered many times. Heavy rainfall Weather. From 3 days to 16 days in two weeks, only 8 or 9 days two days without precipitation, the cumulative rainfall of 319.6 millimeters, 282.2 months than the 1-6 months of this year, 282.2 millimeters and 37.4 millimeters. Especially in July 11th, at 11:00-12:00 noon, only 1 hours of rainfall reached 59.5 millimeters, which is rare in history. According to the weather forecast of the meteorological department, there will be showers or thunderstorms in the whole county on 17 and 18.

The current round of precipitation is characterized by rainy days, strong rainfall, heavy rainfall and long duration, resulting in an increase in water level in the whole county and saturation in cotton fields. The whole county has 525 thousand mu of cotton, all of which are affected by waterlogging. About 1/3 of the fields have been flooded and flooded. The root system of cotton has been damaged and its vitality has decreased.

Two. Cotton growth

Continuous rain causes less sunshine. County Cotton Association's weather record, from July 1st to 16, the cumulative sunshine hours less than 40 hours. The growth of cotton in the bud stage is very unfavorable, and the cotton growth tends to weaken generally, which makes the seedling situation at the end of 6 reverse, and the increment of plant height, true leaf, fruit branch, fruit node and bud is slower than that of the same period last year. In July 15th, the average plant height was only 47.69 cm, fruit branch 9.07, total fruit section 16.98, bud 12.85, 11.76 cm, 1.44, 7.84 and 8.75 respectively, compared with the same period last year, and the abscission rate of flower buds reached 22.5%, higher than 10.8 percentage points of the same period last year.

At the same time, some key measures in cotton field management can not be put in place in time, and cotton diseases and insect pests tend to be serious, especially cotton Verticillium and Verticillium Wilt in some cotton fields. According to the weather forecast of the meteorological department in the next 7 days, starting from 19, the precipitation will come to an end. But the weather is mainly cloudy and cloudy. The temperature is around 23~29 degrees Celsius. It is very beneficial to the development, growth and spread of the pathogen in cotton fields. It may cause some low-lying, poorly drained and old water plants with high water table.

Three, post disaster management measures

In response to the current adverse weather conditions and the disaster situation in cotton fields, the losses brought by the flood and waterlogging disaster were kept to a minimum. In July 16th, the Sheyang cotton cultivation technology guidance Station issued the cotton field management advice after the disaster.

1, assault drainage, drainage and drainage. We should do everything possible to drain the accumulated water in the flooded cotton fields. We should clear the waterlogging early and reduce the flooding time of cotton and minimize the influence of waterlogging. We should clean up the internal and external trench in order to reduce the water level of the draining ditch in order to effectively reduce the soil water content, eliminate the field waterlogging as soon as possible, improve the environment of root growth, and promote the cotton growth.

2, assault and fill fertilizer, supplement nutrition. Water damage and fertilizer supplement are the successful experiences of disaster resistance accumulated over the years. At present, the root system of cotton is generally affected by waterlogging. The ability of absorbing fertilizer is poor, and the rainfall is heavy and the loss of fertilizer is heavy. Especially cotton itself will enter the peak period of fertilizer demand. Therefore, the most effective measures for post disaster recovery are to add fertilizer and replenish nutrition by assault. All fields with heavy waterlogging were immediately sprayed with nitrogen for nutrition, spraying once every 4-5 days. Generally, 0.5-1% urea solution plus spring spring high efficiency liquid fertilizer 25 milliliter foliar spray is used to quickly alleviate the contradiction between cotton seedling physiology and fertilizer shortage, and promote cotton seedling to restore vitality as soon as possible. When the field is suitable for moisture, classify flower and boll fertilizer immediately.

3, sudden weeding, earth up. The cotton fields were repeatedly subjected to rain and waterlogging, which made the soil hardened, the permeability decreased, and the weeds grew fast in the field. When the soil moisture in cotton fields is good enough to stand up, weeding and loosening the soil should be highlighted to enhance the permeability, moisture dissipation and warming effect of cotton fields and promote the growth of cotton plants. At the same time, combine ploughing or stubble removal to help lodging cotton plants in time, so as to avoid a large number of bud abscission caused by metabolic disturbance. We should continue to do well in raising the soil and raising roots, raising the standard of high ridge and ensuring that the ridge height is above 10 centimeters, so as to effectively enhance the ability of disaster resistance in the middle and later stages of cotton plants.

4, assault prevention and treatment of pests, reduce pests and diseases. Recently, the main disease of cotton is Verticillium Wilt and Verticillium wilt. In recent years, Sheyang is the main cause of Verticillium wilt. Once the disease occurs, it is very difficult to have effective control agents and ideal control effect. Therefore, after flood and waterlogging, we should focus our efforts on prevention and control of cotton fields. We should insist on prevention and increase the disease resistance of cotton by increasing the amount of fertilizer. Drainage and drainage should be taken to reduce the groundwater level, so as to reduce the incidence and control the occurrence and spread of diseases. Attention should be paid to pest control in cotton fields. At present, the three generation of bug bugs should be paid close attention to the occurrence of insect pests and the prediction of plant protection departments. Once the control standards are reached, timely medication and symptomatic medication can effectively control the harm and provide an important guarantee for the healthy growth of cotton.

At the same time, chemical control should be combined with Foliar Spraying Nitrogen and insect control. Chemical regulation is an important measure to capture high yield of cotton, and also an effective means of disaster resistance. Therefore, it is necessary to regulate the seedlings appropriately. In order to promote the healthy growth of cotton and ensure the spanportation of organic materials to bolls and bolls, we can better regulate the growth, reduce the shedding, increase bolls and increase yield.