China Cotton Institute: In June, The Pformation Of Seedlings Was Accelerated By &Nbsp, But It Was Still 5-7 Days Late.

China cotton and country

First, the growth of seedlings is accelerating, but fertility is still 5~7 days late, and the imbalance between regions is uneven.

The cotton growth index (CCGI) in China was 85 in June (Table 1), and the true leaf number was 7.7 pieces per plant. This month the seedlings were worse than 15% in the same period last year. It was 80 in the whole year (7 years ago), and it was worse than that in the whole year.

From the overall perspective, the first is the acceleration of seedling pformation in June, compared with the 10 day delayed planting and the 10 day lag in May, and 3-5 days after birth, but the growth rate is still 5-7 days late.

The growth of the North Xinjiang and Hexi Corridor is more obvious.

Two, the proportion of seedling area is less than two to 30% in last year's period, and 1~2 branches per fruit branch.

The three is the imbalance between the regions. The North China Plain and Nanxiang basin are the best. The southern Xinjiang is generally relatively poor, and the northern Xinjiang, Hexi Corridor and the lower reaches of the Yangtze River are relatively poor.

From the middle of May to the middle of June, the weather in North China is better than that in North China and Huang Huai.

Two, the temperature in the large cotton area is still low, the precipitation is too much, and the sunshine is relatively small. Compared with the same period last year, the weather is more rainy and sunny, and the sunshine hours are reduced by one to 20%. Among them, the Jianghan Plain and the southern part of Jianghuai are obviously insufficient.

Three, the disaster is heavy and the disaster area is large.

The cotton fields in the Yangtze River affected by flooding and waterlogging increased, and some parts of Xinjiang suffered frostbite. Huang Huai and the cotton aphid in Northwest China occurred more heavily.

The Yangtze River CCGI was 80 in June, 75 for the whole year, and 6.4 pieces per plant.

The situation is worse than 20% in the same period last year, which is 25% worse than that in the whole year.

Because of the "cold May", the Dongting Lake and Jianghan Plain are not yet late, and the area of weak seedlings, old seedlings and stiff seedlings is large. However, the growth of early spring cotton and Poyang Lake area is better in this basin.

In the Nanxiang basin, the area of cotton pplanted with wheat stubble was large and the seedling condition changed well.

The Yellow River CCGI in June was 87, a year-round of 79, and the number of true leaves was 8.4 pieces per plant.

The difference was nearly 15% in the same period last year, which is 20% worse than that in the whole year.

Overall, the North China Plain has the fastest pformation, the best growth and only 5~6 days lag.

Because of late maturing of wheat and more precipitation in mid June, the cotton fields in wheat fields in Huaibei plain were planted 7~10 days later. The main reason for the late occurrence was the prolongation of the symbiotic period.

The Loess Plateau is weak due to drought.

The Northwest CCGI6 month is 88, which is 88 of the whole year.

The early maturing CCGI was 88 in June, 62 in perennial, and 3.8 in leaf per plant.

The situation is worse than 10% in the same period last year, which is worse than nearly 40%.

Two. Strengthen management, promote pformation, coordinate "three long" and set up a high yield shelf.

From late June to the middle of July, it is the key period to build a high yield shelf.

During this period, the weather showed many characteristics of disasters. The alternation of rainstorms, droughts and hailstones was also a major occurrence of "two wilt", and also the recurrence period of Bt bug in cotton and cotton fields.

In view of the large area of weak seedlings and the incompatibility between vegetative growth and reproductive growth this year, we should take balanced growth, vegetative growth and coordination with reproductive growth (i.e. three long) as the main direction. We should focus on drought prevention and waterlogging prevention, implement classified management, promote the combination of control and control, and build a high yield shelf.

Main technical measures:

1. rob wheat stubble, ploughing and stubble, and pruning seedlings.

Because of the late maturing of wheat, the wheat stubble cotton in the Yellow River valley was planted for 7~10 days in late planting.

Cotton stubble cotton, wheat stubble cotton, wheat covered cotton field and late sowing cotton field should grasp the fixed seedlings, and the pplanted cotton should be cut off two plants; advocate rough pruning and early pruning.

The Yangtze River is rainy and the weeds are growing vigorously. It is necessary to cultivate the soil, remove stubble and weeds, clear up the gully and soil moisture, catch up with the bud fertilizer, and the Yellow River should root up the soil.

2. stabilizing bud fertilizer and applying flower boll fertilizer.

In order to stabilize the bud stage, a group of early cotton fields should see the seedlings to stabilize the bud. Three or four kinds of weak seedlings should be increased with nitrogen fertilizer to promote their growth.

The flowers and bolls of the Yangtze River are divided into two applications, one in late June to early July, one in late July and the beginning of autumn. The Yellow River is generally applied at one time in late July.

Fertilizer varieties require nitrogen and potassium coordination, fertilization should be combined with soil cultivation, high soil fertility, irrigation and drainage, and waterlogging.

3. chemical control.

4. forecast and integrate pest control.

The monitoring of Bt cotton fields should be strengthened. The cotton fields with high yield should be measured and reported.

Timely control of Helicoverpa armigera and blind bug should be combined with chemical control.

In Northwest China, we must pay close attention to the outbreak of red spider and Aphis gossypii.

5. drought and waterlogging prevention and disaster mitigation.

For high temperature, irrigation should be strengthened in Northwest cotton area to increase drip irrigation frequency and drip water volume.

Waterlogging in the Yangtze and coastal cotton areas should be cleaned and draining in time to ensure smooth drainage.

6. flood rescue measures.

The first is the lodging of cotton plants.

The two is to grab and drain the water and quickly wash the sediment on the plant.

Three, early tillage and loosen soil, early fertilization, and four postponing topping for 7~10 days.

Four, after the disaster, cotton growth is flourishing and pests are more serious.

7. remedial measures for hail.

Early hailstone harms cotton and leaves branches and nitrogen fertilizer to promote growth.

In late July (mid July), vegetables should be replanted, and the affected cotton fields should be diagnosed, classified and remedied.