Hebei: comprehensive measures should be taken to prevent lodging of wheat spring tube this year

Introduction: Baoding City, Hebei Province recently inspected the wheat fields of Qingyuan, Anguo, Lixian, Boye, Wangdu and other counties and cities in Baonan Through the investigation and combined with the recent weather and the comprehensive analysis of the weather forecast in April, this year's wheat is threatened by lodging The main reasons are as follows: first, the temperature of wheat is higher than that of the whole year, though it is late to turn green According to the forecast of meteorological department, the temperature in April is 0.5-1 ℃ higher than that of the whole year, which promotes the growth of wheat to speed up, easily causes the wheat straw to be thin and the lodging resistance to be reduced Second, there are more tillers and larger wheat population According to this survey, the total stem number per mu in general wheat field is about 1 million, and the height is up to 1.55 million, among which the large tillers account for 60-70%, and the large tillers are significantly higher than the annual average value, so it is estimated that the number of spikes per mu is more this year Third, the amount of topdressing in spring in some wheat areas is relatively large According to the investigation and inquiry of the farmers who are topdressing, the application of ammonium bicarbonate per mu is generally 75-100kg, which is 0.5-1 times higher than the normal application amount Under the condition of large population this year, if the application of fertilizer is early and the amount of fertilizer is large, it is more likely to cause wheat lodging At present, it is the growing period of two leaves in spring, which is in the middle period of wheat rising, about 10 days before jointing At this time, it is the key period of regulating fertilizer and water to prevent wheat from lodging Therefore, the following technical suggestions are put forward to prevent wheat from lodging 1 Smart arrangement of water and fat The first is to arrange the time and order of watering all kinds of wheat fields For the wheat fields with insufficient population or weak yellow seedling, the first water should be poured immediately For the wheat fields with a population of about 1 million and strong growth, the first water should be postponed to the end of getting up and the beginning of jointing Second, arrange the amount and time of fertilization The total amount of topdressing in spring can be determined according to the yield of wheat and the amount of basal fertilizer applied, generally 45-50 kg of ammonium bicarbonate or 15-18 kg of urea, 350 kg per mu yield level and good seedling condition of high-water fertilizer wheat field should promote the cultivation technology of nitrogen late extension and decline, and the topdressing should be mainly applied in jointing stage; the plots with poor seedling condition and low yield can be applied in stages of rising and jointing; high quality and strong gluten wheat In order to ensure the quality of wheat, the measures of 80% first watering and 20% second watering were adopted Do not use too much nitrogen fertilizer in spring to avoid lodging and late ripening 2 Reasonable use of chemical control technology For the wheat field with lodging risk, plant growth retardants can be sprayed at the second leaf stage of spring to reduce plant height and prevent lodging Special attention should be paid to the fact that Paclobutrazol only has the function of preventing lodging Do not spray on the wheat field without lodging risk At the same time, do not spray again or miss spraying on the spraying technology, otherwise, it is easy to cause uneven growth of wheat and deformity of wheat spike 3 Later watering depends on the weather During the wheat filling period, the watering should be combined with the prevention of lodging Pay attention to the weather forecast, and stop the watering before the gale weather If the wheat is lodging, it is better not to hold or bind it.