How to manage the filling period of wheat? If you do well in these points, you can get a high yield!

With the coming of May, winter wheat in all regions of the country has entered the filling period one after another. This period is the key period for wheat growth and directly affects the yield. So how is the wheat filling period managed? Do well these points can get high yield!

I. Pour grouting water in time

Generally watering according to soil moisture during milk ripening period to wax ripening period and before frequent dry and hot wind period. When the relative humidity of soil is lower than 60%, watering should be timely. Four principles should be followed: one is to irrigate less frequently, and the amount of water should not be too large each time; the other is to prohibit watering in rainy weather; the third is to stop watering half a month before maturity; and the fourth is to strictly control irrigation for wheat fields with excessive nitrogen application.

II. Topdressing nitrogen fertilizer

After 10 to 15 days of wheat flowering period, nitrogen fertilizer should be applied, combined with watering, urea 3-5 kg per mu. After 7 days, nitrogen fertilizer can be applied again, so that wheat does not premature senescence at the filling stage, the growth potential can improve the filling speed, prolong the filling time, increase the 1000-grain weight, and thus significantly increase the yield. At the same time, nitrogen fertilizer can enhance the resistance of wheat.

III. Spraying foliar fertilizer

During this period, potassium dihydrogen phosphate should be sprayed on leaves for 1~2 times. No matter whether it is wet or dry, potassium dihydrogen phosphate can be sprayed from heading to middle filling stage. The general dosage is 200 g per mu each time, and 40~50 kg of water should be sprayed on leaves. For strong gluten wheat, defertilized yellow wheat field, frozen wheat field and hail disaster wheat field, appropriate urea mixed spraying can be applied, 1 kg urea and 100 g potassium dihydrogen phosphate per mu, 40~50 kg water, foliar spraying 2~3 times, spraying interval is about 10 days. Foliar topdressing can prolong the functional period of wheat leaves, improve photosynthesis, prevent diseases and resist lodging, and reduce the damage of dry and hot wind.

IV. Strictly prevent lodging

Wheat grain filling period is generally at the end of April and the beginning of May. Pay close attention to the weather forecast. In case of windy weather, immediately stop irrigation in the field. According to weather forecast, ditch drainage measures can be taken before storm to reduce the risk of root lodging and stem lodging due to excessive soil and plant moisture content. If it falls in the later stage, manual help is strictly prohibited to prevent greater damage. After lodging, the culms usually grow upward from the most vigorous meristem, restore their heads and some culms turn to erect, and the photosynthesis and transportation functions are partially restored.

V. Pest control

Wheat grain filling stage easy to occur aphids, midges, powdery mildew, rust, scab and other diseases and insect pests.

1. Aphids

When the number of aphids reaches 800 and the ratio of benefit to harm (natural enemy: aphid) is lower than 1:150, pymetrozine, acetamiprid, imidacloprid, aphimicarb, matrine, auricularia and other pesticides should be used for spraying control. In the area where conditions permit, it is recommended to release aphidius and ladybug for biological control. In the mixed area of various diseases and insect pests, suitable fungicides and insecticides can be selected and scientifically mixed for comprehensive application.

2. midge

Phoxim granules can be used to make poisonous soil before wheat heading, and then watered for control. Phoxim, beta-cyhalothrin, chlorfluor·imidacloprid and other pesticides can be used for spray control before wheat flowering after heading.

3. Powdery mildew, rust

At the early stage of disease, when the leaf rate of powdery mildew disease in the field reaches 10% or the leaf rust disease rate reaches 5%, the control can be organized in time, and the pesticides can be selected from triadimefon, diniconazole, pyraclostrobin, propiconazole, etc.

4. Scab

If there are more than 2 days of continuous rainy weather in wheat flowering period, the first application time should be advanced to heading period, the pesticide can be selected from cyanystrobin, tebuconazole, thiophanate-methyl, Bacillus subtilis, etc., and the dosage should be sufficient. In case of rain within 3~6 hours after application, timely supplement treatment should be made after rain.

In addition, it is also very important to do a good job of weeding in the field during the wheat filling period. It is necessary to manually pull out weeds before they bear fruit, reduce the amount of grass seeds left in the field, and prevent the spread of disasters. In particular, gramineous weeds do great harm, and attention should be paid to the control of weeds in the field.