The main points of how to manage the wheat filling period have long been known.

With the arrival of May, winter wheat in all parts of the country has entered the filling stage one after another, which is the key period of wheat growth and directly affects the yield.

So, how to manage the wheat filling period? If you do these things well, you can get high returns!

A, timely pouring grouting water

Generally, it is necessary to water the soil according to the soil moisture during the milk ripening period to the wax ripening period and before the frequent dry and hot winds all the year round. When the relative humidity of soil is lower than 60%, it should be watered in time.

Four principles should be followed: first, pour less water, not too much water each time; Second, it is strictly forbidden to water in stormy weather; Third, stop watering half a month before maturity; Fourthly, irrigation should be strictly controlled in wheat fields with excessive nitrogen application.

Second, topdressing nitrogen fertilizer.

After wheat flowering 10 ~ 15 days, topdressing with nitrogen fertilizer, combined with watering, and applying 35 kg urea per mu.

After 7 days, you can topdress again. During this period, nitrogen fertilizer was supplemented, so that the wheat would not decline prematurely at the filling stage, and the growth potential could increase the filling speed, prolong the filling time and increase the 1000-grain weight, thus significantly increasing the yield.

At the same time, supplementary application of nitrogen fertilizer can enhance the stress resistance of wheat.

Third, spraying foliar fertilizer.

During this period, it is necessary to spray potassium dihydrogen phosphate 1 ~ 2 times on the leaves. No matter in dry land, potassium dihydrogen phosphate can be sprayed from heading to middle filling stage, and the general dosage is 200 grams per mu each time, and 40 ~ 50 kilograms of water is sprayed on the leaves.

For strong gluten wheat, yellow wheat field after fertilizer removal, frozen wheat field and hail wheat field, a proper amount of urea, potassium dihydrogen phosphate, kloc-0/kg per mu and 40-50 kg of water can be mixed and sprayed on the leaves for 2-3 times, and the spraying interval is about 10 day.

The absorption capacity of root system is weakened in the late growth stage of wheat, and foliar topdressing can prolong the functional period of wheat leaves, improve photosynthesis, prevent diseases and lodging, and reduce the harm of dry-hot wind.

Fourth, guard against lodging

The filling period of wheat is generally at the end of April and the beginning of May, so we should pay close attention to the weather forecast. In case of windy weather, we should stop field irrigation immediately.

According to the weather forecast, ditch digging and drainage measures can be taken before the storm to reduce the risk of root lodging and stem lodging of soil and plants due to excessive water content.

In case of lodging in the later stage, manual assistance is strictly prohibited to prevent further damage.

After lodging, the stem will generally grow upward from the most vigorous meristem, restore the head and part of the stem will stand upright, and the photosynthesis and transportation functions will be partially restored.

Five, pest control

Wheat is prone to aphids, midges, powdery mildew, rust, scab and other diseases and insect pests during grain filling.

1, aphid

When the number of wheat spike aphids reaches 800, and the benefit ratio (natural enemy: aphid) is lower than 1: 150, pymetrozine, acetamiprid, imidacloprid, pirimicarb, matrine, damping off, etc. Selected for spray control. In areas where conditions permit, it is suggested that aphid bees and ladybugs be released for biological control.

In areas where a variety of pests and diseases are mixed, appropriate fungicides and pesticides can be selected for scientific mixing and comprehensive application.

2. midges

Before wheat heading, toxic soil made of phoxim granules can be evenly spread on the surface, and then watered for control. After wheat heading, phoxim, beta-cypermethrin and chlorpyrifos can be used for spray control.

3. Powdery mildew and rust

At the early stage of the disease, when the leaf rate of powdery mildew in the field reaches 65,438+00% or leaf rust reaches 5%, timely prevention and control can be organized, such as triadimefon, diniconazole, pyraclostrobin and propiconazole. You can be an agent.

4. scabbing

If the flowering period of wheat is rainy and rainy for more than 2 days, the first application time should be advanced to the heading stage, and pesticides such as cyazoxystrobin, tebuconazole, thiram, thiophanate-methyl and Bacillus subtilis can be selected. , and should use enough dose. If it rains within 3 ~ 6 hours after application, it should be replenished in time after the rain.

In addition, it is also very important to do a good job of weeding in the field during wheat filling. Weeds should be manually pulled out before fruiting to reduce the amount of grass seeds left in the ground and prevent the spread of disasters.

Especially gramineous weeds are harmful, so attention should be paid to the prevention and control of weeds in the field.