How to prevent wheat from lodging? Wheat lodging prevention method

The main cause of wheat lodging:

1. The broadcast volume is too large. With the trend of global warming, the number of warm winters is increasing. Especially in winter and spring, special warm winter and spring warm, wheat not only has green winter, but winter tiller has never stopped, resulting in ineffectiveness, serious consumption, large population, crowds between groups and individuals, and poor permeability. The bases are thin, long and weak, and the straw material is not full. It is expected that the winds will fall, but some growers still guard the more dense the higher the old.

2. Water and fertilizer are not proper. After the Spring Festival, the wheat is green to the jointing stage, which is the key period for coordinating the contradiction between the wheat group and the individual. However, due to the lack of management techniques of “different seedlings, classified guidance, and symptomatic treatment”, the growers do not distinguish between the good and the bad after the new year, see the drought and the pouring, plus the large amount of nitrogen fertilizer applied at the expense of blood, premature and excessive fertilizer. The onslaught violated the corresponding management principles of different types of seedlings and the principle of high yield and resistance to field cultivation techniques of “spring water delay, nitrogen fertilizer shifting”. It has laid a "foreshadowing" for the lodging of wheat in the middle and late stages.

3. Missed opportunities. We all know that wheat is a high-yielding crop, especially in the field of breeding, and that good varieties do not match good methods, and how to achieve high yields. For example, before the end of March, it was the “golden season” of wheat conditioner application in the field. Most farmers did not know that they missed the critical period of “anti-reverse and increase production”, which caused the field group to be too large and the stem base to be weak.

Countermeasures to prevent wheat lodging:

Comprehensive measures must be taken to prevent wheat from lodging: reducing the amount of sowing is the basis, and strengthening the adjustment is the key, and water and fertilizer management is the guarantee. Specifically, there are three points below.

1. Under the strong force to reduce the amount of broadcast. Judging from the current production habits, the average peasant sowing amount is 17.5-20 kg, and the amount of light sown basically meets the needs of the harvested ear number. During the growth period, a large amount of tillers are generated, and the soil consumption is undoubted, which will undoubtedly cause serious lodging in the middle and late period. Therefore, in the appropriate sowing period of October 5-15, the general acre amount should be controlled at 10-12.5 kg. The land with high level of soil fertility and fine land preparation has an abundance of 9-10 kg. The difference in soil level and extensive land preparation can be increased to 12.5-15 kg, which can fully meet the needs of a full seedling. It is forbidden to increase the amount of sowing at random. Otherwise, unfavorable factors such as lodging and disease will follow.

2. Strengthen chemical control measures. For medium and high-yield wheat fields, it is essential to take key chemical control measures in critical periods. This technology is the key to preventing lodging. It is necessary to complete the chemical control tasks around March 25. Specific method: use 15% paclobutrazol wettable powder 50-70 grams plus 50 grams of blue crystal code, evenly spray 30 kg of water. And do not spray, do not leak. The chemical anti-falling purpose is achieved by controlling the excessive elongation between the first and second internodes of the base.

3. Water and fertilizer management is used skillfully. The rational use of the first water and fertilizer management measures in wheat spring is very important. It is necessary to take appropriate measures to control and control according to different seedling conditions. For a type of wheat field (the number of acres in the green period is 800,000-1 million), the first fertilizer in spring is postponed to the jointing stage, that is, the fertilizer and water management is carried out in the first half of April, and 15-20 kg of urea is applied per mu. The second type of wheat field (the total number of acres is 600,000-800,000). The first time of water and fertilizer application in spring should be after the rise, that is, from March 20 to the end of the month. Acre can be used to recover 15 kg of urea. The first three types of wheat fields (the total number of acres in the mu is below 600,000) are used in the first half of the spring in mid-March, and 10 kg of urea is applied in the mu. The spring water will be placed in the flag-raising period in late April, and 5 kg of urea will be applied per mu. For the long wheat field (the total number of acres is more than 1.2 million), the first fertilizer in the spring is delayed until the middle and late stages of jointing, that is, after April 10, 15 kg of urea is applied.